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20 July 2018, Volume 24 Issue 4 Previous Issue    Next Issue

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Discussion on the Related Problems of Rice Planting in Saline-Alkali Soil 2018, 24(4): 1-2.  DOI: 10.3969/j.issn.1006-8082.2018.04.001 Abstract ( )   PDF (255KB) ( )   In the light of the problem of “sea rice” proposed in recent years, the successful experiences of the coastal salt land rice planting in China and the breakthrough innovative development of rice salt tolerance in China were analyzed from the point of view of production and breeding practice. It is pointed out that “sea rice” can not change the basic law of salt washing for rice planting in saline and alkali land, which must depend on fresh water irrigation. The research results provide important reference for the protection of saline-alkali land and the development of grain production.

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Characteristics of High Yield and High Efficiency Root and Regulation in Rice 2018, 24(4): 3-8.  DOI: 10.3969/j.issn.1006-8082.2018.04.002 Abstract ( )   PDF (858KB) ( )   The morphological and physiological characteristics of rice root are closely related to the growth and development of aboveground parts, the formation of yield and quality, and the high efficiency utilization of resource. In this paper, the distribution, morphological and physiological characteristics of high yield and high efficiency root of rice were reviewed, and the characteristics of high yield and high efficiency root and regulation techniques were summarized, which would provide theoretical reference for high yield, high efficiency and good quality cultivation technology and breeding.

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Research Advances of Rice Mechanical Direct-seeding Technology in China 2018, 24(4): 9-15.  DOI: 10.3969/j.issn.1006-8082.2018.04.003 Abstract ( )   PDF (1036KB) ( )   Rice direct seeding has the characteristics of cost-saving, labor-saving and efficient, and it’s conducive to mechanized operation. It provides a new direction for rice planting. In recent years, rice mechanized direct-seeding has developed rapidly in many provinces in China. Several rice varieties integrated with kinds of agricultural machinery and technology have been tested and demonstrated. This paper has reviewed the research status of rice variety selection, seeding machinery, yield traits, cultivation techniques and many other aspects, probed into challenges and future research directions of rice mechanized direct-seeding production in China. It provides some theoretical guidance for further promotion and application of rice mechanized direct-seeding.

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Research Advances in the Influence Factors and Related Genes of Rice Quality Traits 2018, 24(4): 16-21.  DOI: 10.3969/j.issn.1006-8082.2018.04.004 Abstract ( )   PDF (779KB) ( )   Rice is one of the main grain crops in China. With the continuous improvement of living standard and consumption levels, people's demand for rice quality is also increasing. This paper briefly summarized the composition, influence factor, gene mapping and cloning as well as breeding and improvement of rice quality traits. Meanwhile, we also discussed the problems encountered in the process of quality improvement.

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Research and Popularization of Wide and Narrow Row Spacing Cultivation Techniques for Rice 2018, 24(4): 22-23,26.  DOI: 10.3969/j.issn.1006-8082.2018.04.005 Abstract ( )   PDF (331KB) ( )   The wide and narrow row spacing cultivation of rice improved the field microclimate and the utilization ratio of light energy per unit area, thus achieved the effect of increasing yield. The 2ZG-8 self-propelled high speed rice transplanter, which was developed according to the wide and narrow row spacing cultivation technique of rice, changed the traditional planting mode, improved the microclimate in the field, at the same time increased the planting density reasonably, not only increased the yield, but also improved the quality of rice. It makes the high-efficient agronomic technology become the actual productivity through mechanical materialization, and opens a new era of rice cultivation.

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Problems and Technical Approaches of Raising Big Seedlings for Machine-Transplanted Rice 2018, 24(4): 24-26.  DOI: 10.3969/j.issn.1006-8082.2018.04.006 Abstract ( )   PDF (381KB) ( )   Rice is one of China’s major food crops. The development of mechanized rice production is of great significance for enhancing China’s comprehensive agricultural production capacity, ensuring food security, increasing farmers’incomes, promoting agricultural supply-side reform and green development. Regulation of rice seedling age is the limiting factor and the key process of rice mechanization production, which has a very significant impact on precision cultivation of rice mechanization production and yield formation. In order to provide an effective way for the entire mechanization of rice development, this paper summarized the classification of rice seedling for mechanized rice production, clarified the existing problem and its developing technical measures of machine-transplanted rice.

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Review on the Relationship between Rice Spray Technology and Rice Type 2018, 24(4): 27-30.  DOI: 10.3969/j.issn.1006-8082.2018.04.007 Abstract ( )   PDF (576KB) ( )   Low volume spray, air spray, electrostatic spray and precise spray are main rice spray technology. However, the mix and change of spray technology is the necessity of developing modern agriculture spray technology research trend. Among them, the target characteristics, plant type of crops and crop growth period become the key problems affecting the development of spray technology. Plant type and canopy structure parameters （leaf area index, leaf angle, plant） are key factors affecting the conduct of rice canopy droplets. Therefore, combines the technique of spray droplets transfer with plant type and canopy structure parameters to research transport and deposition is the starting point and important direction of further study of rice canopy droplets behavior.

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Quality and Safety Risk Factors Analysis and Prevention Measures of Exporting Rice in Jilin City 2018, 24(4): 31-34.  DOI: 10.3969/j.issn.1006-8082.2018.04.008 Abstract ( )   PDF (596KB) ( )   Rice is a superior crop of the regional characteristic in Jilin city. As the number of exporting increases，the risk of export trade increases. To reduce the risk of Jilin city rice exports, based on the actual situation of rice export in Jilin city from 2013 to 2017, the existing quality and safety risk factors which would affect the rice export were analyzed, as well as the prevention and control measures for export quality and safety of rice were put forward. The aim of this paper is to provide a valuable reference for regulators and industry of rice.

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Development of Rice Comprehensive Cultivation Techniques in Recent 20 Years in Zhejiang Province 2018, 24(4): 35-39.  DOI: 10.3969/j.issn.1006-8082.2018.04.009 Abstract ( )   PDF (715KB) ( )   Since the middle of 1990s, six cultivation techniques of rice have been introduced, developed and popularized in Zhejiang province according with social and economic changing and production needing, including light cultivation （dry seedling cultivation, throwing seedling cultivation, direct seeding cultivation）, intensive cultivation, “five changes” cultivation of single cropping late rice, early planting techniques of early rice, accurate quantitative cultivation, and “strong in two aspect and high in two aspect”. These techniques played an important role in improving rice yield and planting benefit. This paper discussed the origin and background, core technical measures, application effect, innovation points of these comprehensive cultivation techniques, and their contribution to the development of rice production in Zhejiang province.

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Analysis on the Status of Cultivar Registration and Extension of Conventional Early Indica Rice in Zhejiang Province during 2001-2015 2018, 24(4): 40-44,49.  DOI: 10.3969/j.issn.1006-8082.2018.04.010 Abstract ( )   PDF (703KB) ( )   In order to screen the excellent conventional early indica rice varieties in Zhejiang province in recent years, guide the breeding and application of early indica rice. In this paper, the yield, resistance, rice quality, growth period, grain structure, promotion areas and genetic relationship of 65 conventional early indica rice varieties registered in Zhejiang province during 2001-2015 were compared and analyzed. The results showed that, the cultivars registered during the 12th five year plan period showed a higher plant height, less effective panicles, bigger spike, increased 1 000-grain weight, decreased seed setting rate and delayed growth period compared to the cultivars registered in the 11th and the 10th five-year plan period. All cultivars registered in the three periods showed good resistance to rice blast disease. The number of high quality edible rice cultivars tend to decrease, while that of the processing cultivars tend to increase. The accumulative promoting areas of the 62 cultivars listed in the statistics of Ministry of Agriculture was   9 215 khm2. The cultivars Jiayu 253, Zhou 903 and Zhefu 802 made important contribution to the production. The cultivars registered during the 12th five-year plan period showed problems such as cultivar homogeneity, over-long growth period and small promotion areas. In conclusion, to keep ahead in the conventional early indica rice breeding, Zhejiang province should make more efforts in the germplasm resources creation, continuously adjust breeding aim and increase cultivar popularization.

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Effects of Varieties，Cultivation Methods and Meteorological Factors on Protein Content of Rice 2018, 24(4): 45-49.  DOI: 10.3969/j.issn.1006-8082.2018.04.011 Abstract ( )   PDF (470KB) ( )   In this paper, a field experiment were conducted under two cultivation patterns in 5 sowing dates, using mid-season hybrid rice varieties Ⅱyou 602 and Jingyou 127 as materials, to study the effects of meteorological factors at different growth stages on grain protein. The results indicated that, the sowing dates, cultivation patterns and varieties had significant effects on the protein content of rice, and the effect on grain protein content ranged from big to small order for sowing dates, varieties, cultivation patterns. There were increasing trend for the protein as the sowing date delayed, the protein increased significantly of the high-nitrogen and low-density treatment than those of low-nitrogen and high-density treatment. The protein content of Ⅱyou 602 were significantly higher than that of Jingyou 127, but the interaction effects of them were not significant at 0.05 level. It is good to the accumulation of grain protein in the condition of higher temperature and more precipitation before earing, and the key weather factors is different between different rice varieties, more precipitation in the whole growth period of rice is beneficial to the accumulation of protein for Jingyou 127, but Ⅱ you 602 would improve rice protein content in the condition of higher daily minimum temperature from jointing to full heading stage, less sunshine time from transplanting to jointing stage and from full heading to mature stage.

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Nutrition Quality Analysis of Three Different Colored Rice 2018, 24(4): 50-54.  DOI: 10.3969/j.issn.1006-8082.2018.04.012 Abstract ( )   PDF (587KB) ( )   8 kinds of mineral elements content, polyphenol content and amylose content of 17 black rice varieties, 16 red rice varieties and 30 white rice varieties was measured in the experiment. The results showed that the contents of the macro-element P of colored rice was higher than that of white rice, the content of black rice was the highest. The contents of the micro-element Fe, Mn, Zn and Cu of colored rice were higher than that of white rice. This study showed that there was a certain correlation between different elements, such as, there was negative correlation between Ca and K, but there was positive correlation between Mg and P. Moreover, there were positive correlation for Fe and Mg, Ca, Cu, P; Mg and Mn, Ca; Mn and P. This study also found that the average polyphenol content of red rice was the highest. The average amylose contents of these rice were in a low and medium level, the average amylose contents of white rice and red rice were significantly higher than that of black rice. But there was no significant correlation between amylose content and polyphenol content.

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Study on the Content and Correlation of Fatty Acid in Rice, Brown Rice and Rice Husk 2018, 24(4): 55-56.  DOI: 10.3969/j.issn.1006-8082.2018.04.013 Abstract ( )   PDF (234KB) ( )   Rice consists of rice husk and brown rice, the content of fatty acid in brown rice is an important index to evaluate whether rice grain is suitable for storage. In order to find out the relations and correlation of the fatty acid content of rice，brown rice and rice husk, 26 samples were selected in this experiment. The results showed that the fatty acid content of rice was positively correlation with the fatty acid content of brown rice and rice husk, the correlation coefficient of the fatty acid content of rice and brown rice reached 0.9207; the fatty acid content of brown rice was negatively correlated with the rice husk. It is feasible to determine whether the rice grain is suitable for storage by measuring the fatty acid content of rice in place of the fatty acid content of brown rice.

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Effects of Magnesium and Zinc Microelement Fertilizer on the Yield and Accumulation of Six Elements of Japonica Rice 2018, 24(4): 57-63.  DOI: 10.3969/j.issn.1006-8082.2018.04.014 Abstract ( )   PDF (789KB) ( )   A field experiment was conducted to study the effects of microelement fertilizer（Mg fertilizer, Zn fertilizer, and Mg-Zn mixed fertilizer） at different fertilizing stage（basic fertilizer, tillering fertilizer and panicle fertilizer） on yield, the content and accumulation of N, Mg, Zn, Mn, Ca and Cu in white rice of japonica rice, using Nangeng 9108 and Nangeng 505 as materials. The results showed that the effect of Zn fertilizer applied at different fertilizing stage on rice yield were not significant. The content and accumulation of the six elements in white rice were significantly increased when the Zn fertilizer was applied as basic fertilizer. With the delay of fertilizing period of Zn fertilizer, it showed a gradual downward trend. The use of Mg fertilizer simultaneously increased the rice yield, the accumulation and content of the six elements, the yield reached the highest when the Mg fertilizer was applied as panicle fertilizer. With the delay of fertilizing period of Mg fertilizer, it showed a gradually rising trend. Mg-Zn mixed fertilizer could also increased yield, the accumulation and content of six element in milled rice. The rice yield, the accumulation and content of six element reached the highest when the Mg-Zn mixed fertilizer was applied as panicle ferlilizer, with the delay of fertilizing period of the Mg-Zn mixed fertilizer, it was descend first and then rise. Magnesium and Zinc Microelement fertilizer could increase the yield and the accumulation of nitrogen and microelements. The Mg-Zn mixed fertilizer applied as panicle fertilizer would be a better method for farmers to increase the rice yield and the accumulation of nitrogen and microelements.

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Effects of Nitrogen Fertilizer on Yield and Nitrogen Uptake of Different Types of Rice 2018, 24(4): 64-67.  DOI: 10.3969/j.issn.1006-8082.2018.04.015 Abstract ( )   PDF (537KB) ( )   The application of nitrogen fertilizer according to the growth characteristics and nitrogen requirement of rice has important significance to reduce rice nitrogen fertilizer, nitrogen loss, improve economic efficiency and protect the environment. A field experiment was conducted to study the effects of different nitrogen application rates on rice yield and nitrogen uptake, using hybrid indica rice Zhongzheyou 1 and conventional japonica rice Nangeng 5055 as materials. The results showed that there was a significant difference in the nitrogen demand between the two types of rice. Among them, the yield of Nangeng 5055 under the condition of 225 kg N/hm2 was higher than that of 180 kg N/hm2 significantly, while Zhongzheyou 1 was opposite. The ratio of nitrogen application also had a significant effect on rice yield. The increase of the proportion of panicle fertilizer promoted the growth of rice shoot, nitrogen uptake and yield of two kinds of rice. The above results showed that the optimum nitrogen application of rice should be adjusted according to the variety, and higher nitrogen application ratio at panicle stage would be beneficial to the increase of yield.

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Effects of Tillage and Salt Washing on Growth and Yield of Rice in Saline-alkali Soil 2018, 24(4): 68-71.  DOI: 10.3969/j.issn.1006-8082.2018.04.016 Abstract ( )   PDF (501KB) ( )   Decreasing the salt content was the key measure for rice planting in saline-alkali land. A field experiment was conducted to study the effects of tillage and salt washing on growth and yield of rice in saline-alkali soil. The results showed that soil electrical conductivity significantly decreased in winter tillage treatment compared with no-tillage treatment, and winter tillage combined with salt washing had further effects. Winter tillage treatments has low yellow leaf percentage, but leaf area index, biomass and nitrogen uptake increased significantly compared with no-tillage treatment. Salt washing decreased soil electrical conductivity and improved rice growth and yield in different tillage treatments. However, the differences of these parameters were not significant in salt washing treatment under winter tillage, and significant differences were found in salt washing treatment under no-tillage. Winter tillage treatment increased rice yield by 66.7% than no-tillage treatment.

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Effects of Salt Stress on Seedling Growth and Photosynthetic Characteristics of Wild Rice 2018, 24(4): 72-75,80.  DOI: 10.3969/j.issn.1006-8082.2018.04.017 Abstract ( )   PDF (543KB) ( )   The effects of various salt stresses on the plant growth and photosynthetic characteristics of wild rice were studied. The result showed that the low concentration of neutral salt accelerated the growth of wild rice to a certain extent, while basic salt restrained the growth of wild rice; the high concentration of salt stress seriously restrained the growth of wild rice. The effect of basic salt stress was stronger than neutral salt stress. It showed strong negative correlation between plant height, root length, root number, root-shoot ratio, net photosynthetic rate, stomatal conductance, transpiration rate, limitation of stomatal for wild rice and two salt stress degree. The intercellular CO2 concentration was very significant positive correlated with the salt stress degree. The wild rice were still retain a certain amount of the growth and biological accumulation, and showed more adaptable to salt stress.

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Effects of Sodic Soil on Stability of Chalky Rice Rate and Chalkiness Degree Using AMMI Model 2018, 24(4): 76-80.  DOI: 10.3969/j.issn.1006-8082.2018.04.018 Abstract ( )   PDF (559KB) ( )   In order to provide the scientific basis for the improvement of appearance quality of rice in sodic soil, AMMI model was used to study the stability of chalky rice rate and chalkiness degree with 5 saline-alkali tolerance rice varieties（Longdao 16, 13G028, 13G030, 13G040, Changbai 9） as materials. The results showed that the stability of chalky rice rate and chalkiness degree were different in different varieties, and the effects of environment on chalkiness character was different. The effects on the total variation of chalkiness character was in the order of genotype（G）＞environment （E）＞G×E. Quadratic sum of PCA1, PCA2 and PCA3 of chalky rice rate and chalkiness degree explained 99.65% and 99.80% of the total variance quadratic sum respectively. The variety stability of Longdao 16 was the best in different saline-alkali environment, 13G030 was the second, followed by 13G028 and Changbai 9, 13G040 was the worst.

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Population Dynamics and Yield Components of Pot-seedling Mechanical Transplanting Rice 2018, 24(4): 81-83.  DOI: 10.3969/j.issn.1006-8082.2018.04.019 Abstract ( )   PDF (404KB) ( )   Through the introduction of a certain type of rice transplanting machine from Northeast China, the population development dynamics and yield formation advantages of pot-seedling mechanical transplanted rice were studied. The results showed that compared with the conventional blanket seedling mechanical transplanted rice, pot-seedling mechanical transplanted rice had wide range of variety selection, strong seedling, elastic seedling age, grow fast after transplanting, sturdy stem, easy to get enough panicle and big spike, the average yield was 646.8 kg/667 m2, increased by 9.9%.

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Effects of Seedling Raising Technology with Tray Overlay in Dark Room and Thin Sowing on Single Cropping Late Rice 2018, 24(4): 84-85,101.  DOI: 10.3969/j.issn.1006-8082.2018.04.020 Abstract ( )   PDF (317KB) ( )   Effects of seedling raising technology with tray overlay in dark room and thin sowing on single cropping late rice were studied, using single cropping late rice Yongyou 1540 as material. The results showed that, the seedling raising technology with tray overlay in dark room and thin swoing could increase seedling quality, accelerate the speed of tiller, increase the number of productive panicles, and increase yield by 3.0% compared with traditional rice seedling raising technology.

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Cadmium Accumulation and Transfer Capacity among Different Types of Rice Cultivars at Seedling Stage 2018, 24(4): 86-90.  DOI: 10.3969/j.issn.1006-8082.2018.04.021 Abstract ( )   PDF (665KB) ( )   Cadmium pollution incidence in rice had become a widespread concern of the state and society. In order to understand the soil Cd2+ adsorption characteristics in the different types cultivars, a water culture experiment was established with the high Cd accumulation cultivars （HCAs） Yuzhenxiang （A1）and Tianyouhuazhan （A2） and the low Cd accumulation cultivars （LCAs） Xiangwanxian 12 （B1）and Jinyou59 （B2） as materials, to examine the Cd absorption and transfer time kinetic characteristics at seedling stage. The results showed that the root and shoot Cd accumulation time kinetic characteristics of the 4 cultivar were all described with Michaelis-Menten equation, α value of their root and shoot all showed like HCAs> LCAs. After 72 h of Cd stress, the total Cd accumulation in all cultivars followed the order of A1> B2> A2> B1, in which the cumulative amount of A2 did not reach the saturation level at seedling stage. The Cd translocation efficiency showed a significant downward trend with prolonging of stress time, and HCAs were higher than those of LCAs. The correlation analysis showed that there was a significant positive correlation among Cd concentration in shoots and roots and Cd translocation efficiency of root to shoot in different rice varieties. It can be seen that the characteristics of high and low cadmium accumulation in rice have a certain time limit, and the low cadmium and low transport types represented by low cadmium varieties, such as Xiangwanxian 12, have high practical value in the cadmium polluted paddy fields planting.

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Conservation and Management System of Rice and Other Important Crop Seeds 2018, 24(4): 91-95.  DOI: 10.3969/j.issn.1006-8082.2018.04.022 Abstract ( )   PDF (783KB) ( )   Crop seed industry is a national strategic and basic core industry. It is the fundamental of promoting the long-term and stable development of agriculture and ensuring the national food security.China is a large agricultural country, crop cultivation has a long history, the earliest planting dates back to 10 000 years ago in the Neolithic period. At present, China has very rich crop germplasm resources, including tens of thousands of local varieties and many varieties imported from abroad. These valuable materials are the most valuable and important strategic resources of a country. If improperly stored or lack of proper storage management method, it will make serious losses in the preservation of germplasm resources. In the course of preservation of germplasm resources, the establishment and utilization of modern germplasm resource bank is the key to the effective preservation of excellent germplasm resources.In recent decades, many countries have made great efforts to protect germplasm resources, and a lot of low-temperature germplasm banks have been built.In this paper, the status of seed preservation of rice and other crops at home and abroad is reviewed, and the current situation of seed storage in China National Rice Research Institute is investigated and analyzed, which could provide base for better and more efficient conservation of germplasm resources.

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Decomposition Characteristics of Rice Straw in Western Heilongjiang 2018, 24(4): 96-98.  DOI: 10.3969/j.issn.1006-8082.2018.04.023 Abstract ( )   PDF (348KB) ( )   Three consecutive years of straw decomposition test was carried out with nylon bag to study the decomposition characteristics of rice straw in Western Heilongjiang. The results showed that, the decomposition of rice straw into stagnation period between every October to May the next year; the straw was into decomposition of from June to September. The change of the decay rate of rice straw is “fast - slow -slow”. On the first anniversary of decomposition, the rate of decay was greatly improved, the rate was 44.3%; on the second anniversary of decomposition, the rate of decay was relatively slow, the rate was 19.5%; on the third anniversary of decomposition, the change of decay was tends to be stable, the decomposing rate was 5.7%.

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Analysis of Meteorological Factors on Rice Blast in the Sanjiang Plain of Heilongjiang Province 2018, 24(4): 99-101.  DOI: 10.3969/j.issn.1006-8082.2018.04.024 Abstract ( )   PDF (367KB) ( )    In order to clarify the relationship between meteorological factors and rice blast in Sanjiang plain, this study collected the occurrence of rice blast and meteorological factors of rice blast infection period by fixed-point investigation method in 2006-2015. The results showed that the sunshine hours in June, precipitation in August and average temperature in July were the main meteorological factors affecting the occurrence and prevalence of rice blast in Sanjiang plain, and the effect of different meteorological factors could lay a foundation for short-term prediction of rice blast in Sanjiang plain.

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Investigation and Analysis of the Dosage of Pesticides for Controlling Rice Diseases, Insect Pests and Weeds in Northern Xinjiang 2018, 24(4): 102-104.  DOI: 10.3969/j.issn.1006-8082.2018.04.025 Abstract ( )   PDF (382KB) ( )   In order to grasp the application level of pest control of rice, provide the scientific basis for the green control of diseases, pests and weeds in paddy fields in northern Xinjiang, the situation and characteristics of controlling diseases, pests and weeds in paddy fields in northern Xinjiang were statistically analyzed, by means of questionnaire survey of farmers and field investigation of paddy. The results showed that the chemical pesticide control of rice field in the main rice area of northern Xinjiang was more targeted and the dosage was within the controllable range. It was necessary to pay attention to the research on the control technology of the newly occurring harmful species, and to improve the level of green control technology.

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Growth and Yield of Chinese Hybrid Rice in Cambodia 2018, 24(4): 105-108,112.  DOI: 10.3969/j.issn.1006-8082.2018.04.026 Abstract ( )   PDF (533KB) ( )   In order to study the growth performance and production value of Chinese hybrid rice in Cambodia, 13 Chinese hybrid rice varieties were planted in Bakan county of Pursat province, Cambodia in 2016. The results showed that 13 Chinese hybrid rice varieties could grow normally in test plots. The whole growth period was 86~98 d and the total leaf number of main stem was 14~15. With the fully and coordinately supply of water and fertilizer during the growth period, the seedling were transplanted with the 24 cm row spacing and 10cm planting spacing, and the final plant height was 80~105 cm, the elongated internode number was about 5, the panicle rate of the stem tillers ranged from 51% to 76%, the panicle number was 6.9~9.9 per plant. The main panicle length was 22~30 cm, the total grain number per panicle was 161~253 and the filled grain number per panicle was 154~238. The seed setting rate was about 90%. The thousand grain weight was 19.7~30.1 g, the panicle weight was 2.37~4.59 g, the yield was 21.8~37.7 g per plant. In the trial field, the yield of rice was 6.8~10.5 t/hm2.

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Effects of Nitrogen Fertilizer Amounts and Urea Types on Yield and Yield Components of Shuyou 217 2018, 24(4): 109-112.  DOI: 10.3969/j.issn.1006-8082.2018.04.027 Abstract ( )   PDF (455KB) ( )   Reasonable application of nitrogen fertilizer is the important measure for high yield cultivation of rice. In order to promote the popularization of Shuyou 217, the effects of different nitrogen amounts and urea types on yield and its components were studied in the double cropping area of rice and wheat in Chengdu Plain in 2016 and 2017. The results showed that the different nitrogen amounts, urea types and their interaction significantly affect the yield of Shuyou 217. The yield was not increased synchronously with the increasement of nitrogen fertilizer, and there were significant differences in yield of different types of urea, low nitrogen amounts of humic acid urea could also obtain higher yield. Therefore, in the production of Shuyou 217, the N-fertilizer management with humic acid urea and  pure nitrogen 8 kg/667 m2, base fertilizer ∶ tiller fertilizer ∶ panicle fertilizer were 6∶2∶2, could obtain better yield and environmental effect.

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Effects of Nitrogen Fertilizer Amount on Canopy Structure and Grain Yield of Hybrid Indica Rice Y Liangyou 886 2018, 24(4): 113-116.  DOI: 10.3969/j.issn.1006-8082.2018.04.028 Abstract ( )   PDF (520KB) ( )   In order to make clear the appropriate amount of nitrogen and ideal population canopy structure of indica hybrid rice Y liangyou 886, the yield, leaf area index （LAI）, SPAD value, photosynthetic radiation utilization and some other parameters were investigated and analyzed under six nitrogen levels. The results indicated that LAI and SPAD value showed a gradually increasing trend, PAR interception efficiency, net dry matter accumulation, PAR conversion efficiency and PAR utilization efficiency at filling stage showed a trend of increasing at first and then decreasing, with the increase of nitrogen fertilizer. Under 390 kg/hm2 of nitrogen, the grain yield of Y Liangyou 886 was the highest, and LAI, SPAD value, PAR conversion and utilization efficiency also reached a high level. 390 kg/hm2 is the appropriate nitrogen fertilizer amount for Y Liangyou 886, which is beneficial to the high yield and high efficiency cultivation.

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Effects of Increased Transplanting Density with Reduced Nitrogen Fertilizer on Yield and Nitrogen Use Efficiency of Plateau Japonica Rice 2018, 24(4): 117-120.  DOI: 10.3969/j.issn.1006-8082.2018.04.029 Abstract ( )   PDF (435KB) ( )   The traditional rice production has been changing to reduce the amount of nitrogen fertilizer and increase the use efficiency. Therefore, a field experiment was conducted in 2016 and 2017 to study the integrated effects of dense planting with less nitrogen application on grain yield and nitrogen use efficiency, using plateau japonica rice Luyu 4 as material． The results indicated that the rice yield was improved, N agronomic efficiency （NAE）, N partial factor productivity（PFPN） and N recovery efficiency was significantly improved by properly increasing the transplanting density with decreasing the amount of nitrogen fertilizer within certain range. Compared with traditional practice（CK）, the yield was increased by 6.37%, and N recovery efficiency was increased by 5.84% significantly, when planting density was increased by 20% and N rate was reduced by 10%; the yield was increased by 4.07% and N recovery efficiency was increased by 8.63% significantly, when planting density was increased by 30% and the N rate was reduced by 20%.

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Effects of Nitrogen Fertilizer Levels and Application Methods on Yield of Shuyou 217 2018, 24(4): 121-123.  DOI: 10.3969/j.issn.1006-8082.2018.04.030 Abstract ( )   PDF (366KB) ( )   The reasonable nitrogen application method is an effective measure for high yield cultivation of rice. In order to better play the high yield potential of the new rice variety Shuyou 217 in Chengdu plain, an experiment was conducted to study the effects of nitrogen fertilizer levels and application methods on yield of Shuyou 217. The results showed that the yield is highest when the amount of Nitrogen was 10~12 kg/667 m2 and the proportion of basal fertilizer, tillering fertilizer and panicle fertilizer was 7∶0∶3.

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Effects of Planting Density on Disease Occurrence and Yield of Liaogeng 212 2018, 24(4): 124-127.  DOI: 10.3969/j.issn.1006-8082.2018.04.031 Abstract ( )   PDF (527KB) ( )   The effects of three planting densities（D1: 30.0 cm×20.0 cm, D2: 30.0 cm×16.7 cm, D3: 30.0 cm×13.3 cm） on the occurrence of rice blast and sheath blight and yield components of Liaogeng 212 were analyzed. The results showed that the rice blast and sheath blight disease of Liaogeng 212 were gradually aggravated with the growth of rice. Compared with D3 treatment, the incidence of sheath blight of D1 treatment was decreased by 26.15 percent point and the disease index was decreased by 5.91 percent point, the incidence of leaf blast was decreased by 43.71 percent point and the disease index was decreased by 21.51 percent point, the incidence of panicle blast was decreased by 42.47 percent point, the disease index was decreased by 16.41 percent point. The order of yield under different plant densities were D1>D2>D3. The incidence of leaf blast and sheath blight had extremely significant correlation with planting density, the incidence of panicle blast had significant positive correlation with planting density, the yield and planting density showed a significant negative correlation. It is possible to control the occurrence of rice blast and sheath blight of Liaogeng 212 by reducing planting density, and the yield of Liaogeng 212 could be improved.

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Effects of Sowing Rate on Yield of Direct Seeding Rice Zhuliangyou 831 2018, 24(4): 128-129.  DOI: 10.3969/j.issn.1006-8082.2018.04.032 Abstract ( )   PDF (235KB) ( )   Effects of sowing rate on yield of direct seeding rice Zhuliangyou 831 was explored in this paper by regional contrast test. The results showed that the yield of Zhuliangyou 831 was increased first and then decreased with the increase of sowing rate, 22.5 kg/hm2 is the suitable sowing rate.

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Discuss of Suitable Sowing Date of Precision Hill-drop Drilling Early Rice in the Southern of Zhejiang Province 2018, 24(4): 130-131.  DOI: 10.3969/j.issn.1006-8082.2018.04.033 Abstract ( )   PDF (239KB) ( )   The experiment results showed that sowing date had a great effect on yield, effective panicles, seed setting rate and 1000-grain weight, but had no obvious effect on total grain number per panicle of precision hill–drop drilling early rice Zhongzao 39. The development stages were postponed correspondingly, the whole growth periods were obviously shortened with the delay of sowing date. The suitable date of precision hill–drop drilling early rice is April 5-12 in Ruian city.

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Effects of Panicle Fertilizer Application Stage on Yield and Agronomic Characteristics of Hybrid Rice in Karst Region 2018, 24(4): 132-134.  DOI: 10.3969/j.issn.1006-8082.2018.04.034 Abstract ( )   PDF (333KB) ( )   A field experiment was conducted to explore the application stage of panicle fertilizer on yield and agronomic characteristics of hybrid rice in 2015, using Y-Liangyou-1, Yuyou 7109 and  Jiangyou 919 as materials. The results showed that, applying panicle fertilizer at inverse 3rd leaf could get highest yield in all the three hybrid rice, and the yield were increased by 4.26%~9.01%, 2.12%~19.22%, 3.43%~9.93% compared with the other treatments; the 1000-grain weight and panicle length were also highest in applying panicle fertilizer at inverse 3rd leaf; the plant height, the length and the width of the top three leaves were decreased with the delaying of panicle fertilizer application period.

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Breeding and Application of New Japonica Rice Cultivar Yanggeng 113 2018, 24(4): 135-136.  DOI: 10.3969/j.issn.1006-8082.2018.04.035 Abstract ( )   PDF (277KB) ( )   Yangjing 113 is a new mid-maturity and mid-season japonica rice cultivar with high yield, stable yield, multi resistance and wide adaptability, bred by Jiangsu Lixiahe Regional Agricultural Research Institute. In national group of huanghuai japonica rice regional test, it showed good comprehensive performance, high yield, suitable for planting in Xinyang and along the Yellow River in Henan, South Shandong, Jiangsu Huaibei, Anhui Huaibei and along the Huaihe River.

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Breeding and Application of indica-japonica Hybrid Rice Combination Puyou 201 with Super High Yield 2018, 24(4): 137-139.  DOI: 10.3969/j.issn.1006-8082.2018.04.036 Abstract ( )   PDF (456KB) ( )   The indica-japonica hybrid rice combination Puyou 201 was bred by Pudong New District Agro-technology Extension Center, using BT-type CMS line Pugeng 06A as female parent and T201 as male parent. It has the characteristics of large panicle, fine quality, good disease resistance, optimum maturity and super high yield. This paper summarized the breeding procedure of Puyou 201, the key points of high yield cultivation techniques and seed production techniques.

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Performance and High Yield Machine Transplanting Cultivation Techniques of Huazheyou 1 in Wuyi County 2018, 24(4): 140-142.  DOI: 10.3969/j.issn.1006-8082.2018.04.037 Abstract ( )   PDF (376KB) ( )   In 2017, a demonstration on high yield of single cropping rice Huazheyou 1 was carried out in Wuyi county, and the average yield reached 757.5 kg/667 m2. The yield components and technical index of Huazheyou 1 as single cropping rice with 750 kg/667 m2 were determined. Based on the planting performance, high yield machine transplanting techniques of Huazheyou 1 in Wuyi region were put forward.