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20 November 2018, Volume 24 Issue 6 Previous Issue    Next Issue

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Analysis on Characteristics of Rice Varieties Registered in China in 2017 2018, 24(6): 1-7.  DOI: 10.3969/j.issn.1006-8082.2018.06.001 Abstract ( )   PDF (652KB) ( )    767 rice varieties, including 49 conventional indica rice, 224 two lines indica hybrid rice, 268 three lines indica hybrid rice, 169 conventional japonica rice, 39 japonica hybrid rice, 18 sterile lines, were registered by Crop Variety Approval Committee in China in 2017, the number is significantly higher than it was in 2012-2016（the average is 452）. From the main body of variety breeding, 75.10% varieties were bred by enterprises in 2017, China's rice commercial breeding system has achieved remarkable results. Average yield of conventional indica rice, two lines indica hybrid rice, three lines indica hybrid rice, conventional japonica rice and japonica hybrid rice were 468.38, 616.05, 576.18, 647.77 and 678.69 kg/667 m2 respectively, the yield of all varieties except conventional indica rice was higher than that of the previous five years. In 2017, the quality compliance rate of rice varieties was 54.34%, the quality was improved to a certain extent compared with the previous five years. There are few varieties with outstanding comprehensive resistance, but some excellent resistant germplasm resources exist in all provinces.

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Research Progress on Effects of Common Water Saving Irrigation Methods in Paddy Field on Rice Yield and Quality 2018, 24(6): 8-12.  DOI: 10.3969/j.issn.1006-8082.2018.06.002 Abstract ( )   PDF (686KB) ( )   Rice is the important food crop in China, and it is also the largest water consumer. Water management has a significant impact on rice yield and quality. At present, water-saving irrigation methods commonly used in rice production include conventional shallow water irrigation, wet irrigation, alternate wetting and drying irrigation, and dry cultivated management. In this paper, the effects of several water-saving irrigation methods on grain yield and quality were summarized, and the research ideas of future water-saving irrigation for rice were put forward, in order to provide a theoretical basis for high-yielding with good-quality and water-saving cultivation of rice.

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Effects of Mechanical Deep Fertilization Treatment on Yield and Root Distribution of Super Rice 2018, 24(6): 13-17.  DOI: 10.3969/j.issn.1006-8082.2018.06.003 Abstract ( )   PDF (597KB) ( )   In order to study the effects of mechanical deep fertilization treatment on grain yield and root distribution of super rice, a field experiment was conducted by using conventional super rice varieties Yuxiangyouzhan and super hybrid rice varieties Tianyou 998 as materials, the yield and its components, the root volume and dry weight of root in 0~5 cm, 5~10 cm, 10~15 cm and ≥15 cm soil, and total root volume and dry weight of root were study. The results showed that, compared to artificial fertilization and no fertilizer treatment, the yield of mechanical deep fertilization treatment were significantly increased by 7.72% and 15.37% respectively, as a consequence of 1 000-grain weight significantly increased. At booting stage, the root volume of ≥15 cm soil of mechanical deep fertilization treatment was increased compared to artificial fertilization treatment, root volume was increased by 100.78% significantly compared to no fertilizer treatment; total root dry weight was significantly improved by 84.11%（compared to artificial fertilization treatment）and 139.19% （compared to no fertilizer treatment）. At flowering stage, the root volume at 0~5 cm soil of mechanical deep fertilization treatment was significantly increased by 31.99% （compared to artificial fertilization treatment） and 42.43% （compared to no fertilizer treatment）, the total root volume was significantly enhanced by 26.60% （compared to artificial fertilization treatment） and 34.39% （compared to no fertilizer treatment）. At mature stage, the root volume at ≥15 cm soil of mechanical deep fertilization treatment was significantly increased by 142.62% （compared to artificial fertilization treatment） and 158.56% （compared to no fertilizer treatment）, the total root dry weight was significantly enhanced by 104.20% （compared to artificial fertilization treatment） and 163.87% （compared to no fertilizer treatment）.

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Analysis of Grain Characters of Indica Rice Varieties in the Middle and Lower Reaches of Yangtze River 2018, 24(6): 18-20.  DOI: 10.3969/j.issn.1006-8082.2018.06.004 Abstract ( )   PDF (310KB) ( )   Grains of 47 main varieties in the middle and lower reaches of Yangtze River were used as materials in this research, the statistics of each grain character were output by the automatic seed test analysis and 1 000 grain weight instrument. The results showed that, the correlation between length-width ratio and roundness is greatest among grain characters, the correlation index is -0.98. According to the roundness, grains of rice could be divided into 3 types, the circular type’s roundness is more than 0.303, the oval type’s is between 0.248 and 0.303, the long type’s is less than 0.248.

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Effects of Different Cultivation Patterns on Grain Yield and Nutrient Utilization Efficiency of Japonica Rice in Xinjiang 2018, 24(6): 21-25.  DOI: 10.3969/j.issn.1006-8082.2018.06.005 Abstract ( )   PDF (658KB) ( )   Field experiments were conducted to explore the integrated cultivation technique which could increase grain yield and nutrient use efficiency of rice in Bulakesu and Mushi townships of Shufu county in Xinjiang province. Using japonica rice variety Xindao 11 and a local red rice Mushihongmi as materials with 2 treatments: local farmer’s practice （FP） and optimized cultivation （OPT）. The results showed that in Bulakesu township, compared to FP treatment, the grain yield of Xindao 11 was 10.6 t/hm2 under OPT treatment, which was increased by 30.7%; the irrigation frequency was reduced 6 times, which was decreased by 24.1%; the partial factor productivity of N, P and total fertilizer were enhanced by 113.8%, 257.9% and 94.3%, respectively. In Mushi township, compared to FP treatment, the grain yield of the red rice variety was 3.0 t/hm2 under OPT treatment, which was increased by 44.3%; the irrigation frequency was reduced 6 times, which was decreased by 27.3%; the partial factor productivity of N, P and total fertilizer were enhanced by 136.1%, 295.1% and 112.2%, respectively. Through the integrated optimization of cultivation techniques, the yield and fertilizer utilization rate of rice could be improved simultaneously, and the high yield and high efficiency cultivation model （OPT） could be further demonstrated and applied in Xinjiang.

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Effects of Rice Straw Wet Compost on Grain Quality of Rice 2018, 24(6): 26-29.  DOI: 10.3969/j.issn.1006-8082.2018.06.006 Abstract ( )   PDF (471KB) ( )   The effects of different fertilizer types and fertilization methods on grain quality of rice were compared and studied, and the appropriate amount of rice straw wet compost was also discussed in this paper. The results showed that rice chalkiness, protein content and other indicators were significantly different between different fertilization treatments, the treatments with rice straw wet compost had higher taste value, among them, the taste value of the treatment with 50% rice straw compost + 25% fertilizer was the highest. Rice straw wet compost had great effects on improving rice chalky, taste and reducing the amount of fertilizer, it could be used as one of the important measures for high quality rice production.

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Development Status and Characteristics of Direct Seeding Cultivation in Japan 2018, 24(6): 30-36.  DOI: 10.3969/j.issn.1006-8082.2018.06.007 Abstract ( )   PDF (984KB) ( )   Direct seeding cultivation is a key technology to solve the problems of the shortage of labor force and production costs rising in China（because it does no need to seedling raising and transplanting）. The research and development of direct seeding cultivation in Japan is advanced in Asian. This paper reviewed the significance and development history of direct seeding cultivation in Japan，introduced its classification, compared the characteristics of direct seeding cultivation and transplanting cultivation from the characteristics of emergence, growth, yield, quality, taste and so on. Combined with China's domestic situation and pointed out its guidance on the development of direct seeding cultivation in China.

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Effect and Estimation of the Soil Rapid Nutrient Content on Basal Yield of Rice 2018, 24(6): 37-39.  DOI: 10.3969/j.issn.1006-8082.2018.06.008 Abstract ( )   PDF (398KB) ( )   The correlation and influence of soil available nutrient on base yield were analyzed, using 1748 data of rice “3414” fertilizer test of Hunan province in recent years. The results showed that the soil available nutrients were highly significant positive correlated with the yield of rice in the non fertilization basal yield and no N, P, K basal yield among them, the content of alkali hydrolyzable nitrogen had the greatest correlation with basal yield, followed by available K and available P. The path analysis showed that total fertilization yield had the greatest direct effect on yield. Therefore, the regression mathematical model can be used to estimate the basal yield by its significant correlation, the non fertilization basal yield and no N, P, K basal yield could be obtained, Then, the use efficiency of N, P, K fertilizer, soil effective nutrient correction coefficient and relative yield were calculated. It could calibrate and develop recommendation fertilization scheme, and guide scientific fertilization of rice production.

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Effects of Leaf-cutting and Sticking Treatments on Leaf SPAD Value about Two Sides of Main Vein of Flag Leaf and Grain Yield of Rice 2018, 24(6): 40-46.  DOI: 10.3969/j.issn.1006-8082.2018.06.009 Abstract ( )   PDF (799KB) ( )    In order to compare the effects of two sides （smooth side and rough side） of flag leaf on grain yield of rice, the authors set up five treatments（cutting smooth side away from 2 cm leaf cushion, cutting rough side away from leaf cushion 2 cm, sticking 10 cm on the middle of smooth side, sticking 10 cm on the middle of rough side, and CK）by the method of cutting and sticking flag leaf, using Q you 6 and Zhunliangyou 527 as materials with three nitrogen levels， and analyzed their total grain weight, ratio of grain weight and leaf length, 1000-grain weight, seed setting rate, and change of SPAD value. The results showed that, the total grain weight of cutting or sticking smooth side was lower than cutting or sticking rough side, but there was no significant difference on total grain weight, 1000-grain weight, grain number per panicle,  seed setting rate of this treatment under the same rice variety and nitrogen level. The ratio of grain weight and leaf length of Q you 6 and Zhunliangyou 527 was 1.00~1.20 g/cm and 0.90~1.00 g/cm, respectively. The ratio of grain weight and leaf length treatment of cutting and sticking a side of flag leaf was lower than blank control in Q you 6, and that was higher in Zhunliangyou 527. The absolute value of chain growth rate of SPAD value of rough side was greater than that of smooth side, and some situation that of cutting or sticking smooth side was higher than cutting or sticking rough side. Generally, the contribution of smooth side of flag leaf on grain yield was higher than that of rough side in rice.

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Study on Techniques for Germination of Brown Rice of Salt Tolerant Germplasm Haidao 86 2018, 24(6): 47-49.  DOI: 10.3969/j.issn.1006-8082.2018.06.010 Abstract ( )   PDF (368KB) ( )   The best techniques for germination of brown rice of Haidao 86 was determined by orthogonal test, namely, soaking temperature 30℃, soaking time 10 h, germination temperature 30 °C, germination time 12 h. On this condition, the germination rate reached 97.3%. The optimum techniques for the compounding of germinated brown rice flour of Haidao 86 was determined by orthogonal experiment, namely, xylitol 2.0%, oligoisomaltose 5.0%, sucrose 3.0%, edible salt 1.0%. In this way, the taste of germinated brown rice flour of  Haidao 86 was the best.

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Discussing of Suitable Measuring Time on Dry Paddy by Grain Moisture Measuring Apparatus 2018, 24(6): 50-52.  DOI: 10.3969/j.issn.1006-8082.2018.06.011 Abstract ( )   PDF (345KB) ( )   Five rice samples were selected and baked in a drying box oven at 80℃ for 0.5 h, 1.5 h, 3.5 h, 6.5 h, 10.5 h, 22.5 h and 34.5 h after drying, obtain the data by weighing and measuring moisture content respectively. The results indicated that the moisture content measured immediately after drying is lower than measured after a certain period of time，and converted to the standard water yield is too high through PM-8188New Capacity Grain Moisture Measuring Apparatus. From the test results, it is advisable to measure the moisture content 22.5 h after the drying.

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Practice and Discussion on the Application of Corn Hot-air Dryer in Drying Rice 2018, 24(6): 53-55.  DOI: 10.3969/j.issn.1006-8082.2018.06.012 Abstract ( )   PDF (332KB) ( )   In order to explore the drying technology of rice grain, a text was conducted with 3 500 t newly acquired japonica rice, using corn hot-air dryer, and measured indicators of the water content, fatty acid value, color, odor, taste score before and after drying, as well as the correlations. The results showed that corn hot-air dryer could effectively reduce the water content of rice; there is no significant difference on the fatty acid value before and after drying, T test P value remains 0.706; taste score T test P value remains 0.788; color, odour and other detection indexes were normal after drying. From all aspects of indicators, using corn hot-air dryer to dry rice, could ensure that the rice grain reaches the safe storage standard, and guarantee the original quality of rice grain.

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Achievements, Problems and Prospects of Conventional Rice Breeding in Guangxi Province 2018, 24(6): 56-59.  DOI: 10.3969/j.issn.1006-8082.2018.06.013 Abstract ( )   PDF (543KB) ( )   Through the analysis of the quality, yield and resistance of conventional rice varieties bred in Guangxi during 1983-2017, the achievements and existing problems in the breeding of conventional rice in the past thirty years in Guangxi are summarized. In the future, it is necessary to select the conventional fragrant rice varieties with high resistance to rice blast, high yield and high quality. Meanwhile, it is necessary to select the functional rice varieties, such as iron-rich, selenium-rich, zinc-rich varieties and nitrogen high efficiency varieties.

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Study on Farmers' Willingness to Adopt Rice Direct Seeding Technology and its Influencing Factors 2018, 24(6): 60-66.  DOI: 10.3969/j.issn.1006-8082.2018.06.014 Abstract ( )   PDF (897KB) ( )   Farmers as adopters of rice direct seeding technology, their adoption attitude and willingness are directly related to the effective promotion. According to the survey data of 312 farmer households in three major rice cultivation counties in Hunan province, using the technology acceptance model analysis framework, the structural equation model was used to empirically analyze the willingness and influencing factors of farmers' adoption of rice direct seeding technology. The results showed that farmers' willingness to adopt rice direct seeding technology is directly and positively affected by factors, such as perceived usefulness, perceived ease of use and adopting attitudes. At the same time, it was indirectly positively affected by other factors, such as adoption conditions and social influences. Among them, perceived ease of use and social influences are the most important psychological factors and external factors, respectively. According to this, we should aim at the actual demand of farmers from the actual situation of rice production in Hunan province, through the research and development of simple, practical and efficient technology, reconstruct the technology diffusion social network, improve the service ability of agricultural science and technology, and take the digital innovation service as the means, and promote the effective popularization of rice direct seeding technology.

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Effects of Water, Density and Fertilizer Interaction on Yield and Yield Components of Rice 2018, 24(6): 67-69.  DOI: 10.3969/j.issn.1006-8082.2018.06.015 Abstract ( )   PDF (428KB) ( )   Field experiments were conducted to explore the effects of the interaction among water, density and fertilizer on yield and dry matter accumulation of rice, using Xiangwanxian 13  and Fengyuanyou 299 as materials in Meihua village of Hengyang city. The results showed as follows, the yield was the highest under the condition of W2D3F1, which was  7 788.0 kg/hm2; the yield was the lowest under the condition of W1D1F0, which was 4 527.5 kg/hm2. The average yield of W2 was 338.3 kg/hm2 higher than W1. The average yield of D1 was 504.7 kg/hm2 higher than D3 and 142.2 kg/hm2 higher than D2. The average yield under the condition of F1 was 1 650.5 kg/hm2 higher than F0. The effective panicles per unit area were greatly influenced by planting density and fertilizer, only water management was not significant, but under the condition of interaction between moisture and density, the increase was especially significant. The increase of fertilization and density could effectively increase the total grain number per panicle. With the increase of planting density, the seed setting rate was reduced. The change of 1 000-grain weight was not significant under the interaction of water, density and fertilizer. Under the condition of fertilization, the production could be promoted significantly. The yield under F1 was higher than the yield of F0. In a certain range, the yield increased gradually with the increase of density. Under the interaction of the intermittent irrigation and the density, there was no significantly different in total grain number per panicle. In summary, fertilization, flooding and appropriate density could effectively improve rice yield, and there is a certain interaction effects among the three factors.

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Effects of Activated Water on Agronomic Characteristics of Rice by Drip Irrigation under Mulch Film 2018, 24(6): 70-72.  DOI: 10.3969/j.issn.1006-8082.2018.06.016 Abstract ( )   PDF (359KB) ( )   To reveal the effects of activated water on the main agronomic traits of rice and promote the rice cultivation level of drip irrigation under mulch film, an experiment was conducted using T-43 as material. The plant height, tiller number, growth period and main yield components were determined in this study. The results showed that activated water could improve the 6 indexes, such as plant height, tiller number, effective panicle number, seed setting rate, grain number per spike and yield of rice by drip irrigation under mulch film, and shorten the growth period of rice, but had no significant effect on thousand-grain weight of rice.

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Effects of Dry Seeding and Drought Irrigation on Grain Yield and Quality of Rice 2018, 24(6): 73-75.  DOI: 10.3969/j.issn.1006-8082.2018.06.017 Abstract ( )   PDF (353KB) ( )   Effects of both dry seeding and drought irrigation（DSDI） and wet seeding and moist irrigation（WSMI） on the yield and quality of rice were studied with seven indica cultivars as materials. The results showed that compared with WSMI, the yields of DSDI treatments were reduced by different degrees, the spike number, spikelet number per panicle and 1 000-grain weight of DSDI treatments were significantly lower than WSMI treatments, the seed setting rate performance different of different varieties; the amylose content, milled rice rate and head rice rate were increased significantly, DSDI has a positive effect on improving rice quality.

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Effects of Biochar on Yield and Quality of Kengeng 5 2018, 24(6): 76-79.  DOI: 10.3969/j.issn.1006-8082.2018.06.018 Abstract ( )   PDF (448KB) ( )    In order to explore the effects of biological carbon on yield and quality of Kenggeng 5, a single factor complete random test was designed. The results showed that when the amount of biological carbon was 7 500 kg/hm2, the yield of rice was the highest, up to 13.90 g per hill, which was significantly higher than the control; the effective panicles were 13.86 per hill, which were significantly higher than that of the control; the protein content was the lowest, which was 2.56% lower than the control, and the taste score was the highest, which was 1.04% higher than the control. The head rice rate of all treatments was higher than that of the control, and when the amount of biological carbon was 16 500 kg/hm2, the head rice rate was the highest, which was 7.09% higher than the control. When the amount of biological carbon was 12 000 kg/hm2, the chalkiness degree and chalky rice rate were the lowest with 7.30% and 13.90%, respectively, which were 28.76% and 20.11% lower than the control. The yield, effective panicles, grain number per panicle, seed setting rate, head rice rate and taste score of rice were increased when the application of biological carbon was 7 500 kg/hm2.

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Effects of Different Planting Patterns on Seedling Quality and Yield Components of Rice 2018, 24(6): 80-82.  DOI: 10.3969/j.issn.1006-8082.2018.06.019 Abstract ( )   PDF (381KB) ( )   The productivity comparison tests of three planting patterns of pot-seedling mechanical transplanting, pot-seedling throwing and conventional carpet seedling mechanical transplanting were carried out in Zhenjiang City, three main local rice varieties were used as the test materials. The results showed that, the quality of dry nursery pot-seedlings was higher compared with the conventional dry-nursery carpet seedlings; the transplanting quality of mechanical transplanted pot-seedlings and threw pot-seedlings were higher compared with mechanical transplanted carpet seedlings, and could obtain higher spikelets and higher seed plumpness. Finally, the yields were increased by 8.4% and 6.8%, respectively.

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Correlation Analysis of Agronomic Traits and Quality Traits of Early Japonica Rice in Cold Region 2018, 24(6): 83-86.  DOI: 10.3969/j.issn.1006-8082.2018.06.020 Abstract ( )   PDF (419KB) ( )   In order to promote the breeding of early japonica rice with high quality in cold region, the main agronomic traits and quality traits of the early japonica rice germplasm resources were analyzed. The results showed that plant height and eating score was significantly negative correlation, increased inverted one and three internode thickness of rice could improve milling quality and appearance quality. The leaf base angle has great influence on quality traits, reducing leaf base angle could increase the milling quality, appearance quality and taste score. The characters of panicle have the great influence on milling quality, which was positively correlated. There was significant negative correlation between the seed setting rate of primary branch and secondary branch and appearance quality.

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Identification of Rice Germplasm Resources for Cold Tolerance at Seedling Stage under Natural Low Temperatures in Heilongjiang Province 2018, 24(6): 87-89.  DOI: 10.3969/j.issn.1006-8082.2018.06.021 Abstract ( )   PDF (537KB) ( )   Rice germplasm resource is one of the most important bases for breeding. Cold resistance of rice cultivar in Heilongjiang province is a critical characteristic for adapting to cold climate. In this study, the authors evaluated 888 rice germplasm resources for cold tolerance at seedling stage under natural low temperature happened in 2017 of Heilongjiang province, which could provide a good material reference for cold resistant breeding. The results showed that 804 accessions were classed into the high-level tolerance （Grade 1） at seedling stage, accounting for 90.5% of total accessions. Among them, 128 accessions seedling survival rate was 100%, in which Heilongjiang, Jilin, Liaoning, Ningxia, Jiangsu, Japan, Korea, India has 56, 40, 8, 4, 1, 16, 4, 1 accession, respectively, accounting for 14.6% of total accessions; 40 accessions were classed into Grade 2, accounting for 4.5% of total accessions; 23 accessions were classed into Grade 3, accounting for 2.6% of total accessions; 11 accessions were classed into Grade 4, accounting for 1.2% of total accessions; 5, 3, 2 accessions were classed into Grade 5, Grade 6, Grade 7, accounting for 0.6%, 0.3%, 0.2%, respectively.

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Evaluation of Yield and Field Resistance to Heat of Regengyou 35 in Single-season Rice Areas of Jiangxi Province 2018, 24(6): 90-92.  DOI: 10.3969/j.issn.1006-8082.2018.06.022 Abstract ( )   PDF (377KB) ( )   The resistance to heat of Regengyou 35 was evaluated by natural high temperature in 2016-2017, at Rice Foundation Seed Farm of Dengjiabu of Jiangxi province. The results indicated that the resistance to heat of Regengyou 35 was signficiant better than Y Liangyou 1, during two weeks of 36℃~38℃, and the seed setting rate exceeded 75%. It has adequate grouting and full grains, the yield is similar to Y Liangyou 1. Therefore, this variety shows good resistance to heat in single-season rice areas of Jiangxi province and has good prospects of popularization and application.

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Effects of Side Deep Fertilization Technology on Yield of Machine Transplanted Early Rice 2018, 24(6): 93-94.  DOI: 10.3969/j.issn.1006-8082.2018.06.023 Abstract ( )   PDF (337KB) ( )   An experiment was conducted to study the effects of different base-manure fertilization methods on yield, using indica rice Zhongzao 39 as material. Compared with traditional base-manure fertilization method, the side deep base-manure fertilizing method with machine transplanting could reduce the quantity of base-manure fertilizer, enhance effectiveness of fertilizer, speed up the growth of tillers, increase the number of effective panicles, and the yield was increased by 11.31%.

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Process Flow of Rice Factory Darkening Nursery Technology in the West Bank of the Yellow River 2018, 24(6): 95-99.  DOI: 10.3969/j.issn.1006-8082.2018.06.024 Abstract ( )   PDF (703KB) ( )   The rice factory darkening nursery is the important embodiment of modernization, large-scale and intensive production of rice. It has achieved the effective combination of modern agricultural equipment and agricultural technology, and also plays an important role for quality, efficiency and reduction of cost. Based on the practice of rice scale planting in the west bank of the Yellow River, the authors made a comprehensive review and summary of the process flow of rice factory darkening nursery technology. It plays a guiding role in the effective extension and efficient planting of rice in the west bank of the Yellow River.

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Effects of Different fertilizer on Growth and Yield of Rice with Pot Seedling Raising 2018, 24(6): 100-102.  DOI: 10.3969/j.issn.1006-8082.2018.06.025 Abstract ( )   PDF (458KB) ( )   In order to provide a basis for the cultivation of strong seedlings and explore the reasonable fertilization techniques of rice with pot seedling raising, an experiment was conducted using Ⅱ you 118 and Liangeng 7 as materials, the nitrogen absorption rate and efficiency under different fertilizer at seedling stage were measured, and the emergence of rice seedlings of different treatments was investigated. The results showed that it had high yield and fine seedling quality when applying urea 30 kg/667 m2, diammonium 20 kg/667 m2 and seedling bed fertilizer 30 kg/667 m2 at seedling stage of Liangeng 7 and Ⅱ you 118.

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The Selection of Organic Rice Cultivars in North of Guangdong 2018, 24(6): 103-107.  DOI: 10.3969/j.issn.1006-8082.2018.06.026 Abstract ( )   PDF (612KB) ( )   To select the cultivars with good quality, strong resistance, moderate growth period and higher yield is the prerequisite for organic farming. Under the condition of organic farming, several conventional rice varieties in the North of Guangdong were tested. The results showed that Meixiangzhan was accounted for preferred variety in organic rice cultivation in the North of Guangdong, while black rice was suggested as a special nutrient rice in production.

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Screening of Imazethapyr-resistant Rice Resources 2018, 24(6): 108-109.  DOI: 10.3969/j.issn.1006-8082.2018.06.027 Abstract ( )   PDF (297KB) ( )   Application of herbicide-resistant rice varieties is beneficial for improving the production problems of rice, including the disaster of the weed, weedy rice and the confounding of the faking hybrid seed. However, few herbicide-resistant rice germplasm had been found. In this study, the authors screened 7,403 rice collections varieties by imazapic（70 g/hm2） spraying treatment at 2～3 leaves stage, and successfully obtained 1 new imazethapyr -resistance rice germplasm.

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Adaptability Experiment of Several Rice Varieties in the Saline-alkali Soil 2018, 24(6): 110-111.  DOI: 10.3969/j.issn.1006-8082.2018.06.028 Abstract ( )   PDF (259KB) ( )   A salt-tolerance and adaptability experiment （in which 6 rice varieties were used as materials） was conducted in the saline-alkali soil. The results indicated that the salt-tolerance and adaptability of 9K-210 and 7K-339 were stronger than other rice varieties, Nangeng 9108 was the worst. Yandao 12 was good at the salt-tolerance and adaptability, but the yield was low. Ninggeng 8 and Nangeng 5055 could be cultivated in saline-alkaliland as alternative varieties.

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Effects of Direct Sowing and Transplanting on Growth and Yield of Heigeng 10 in High Latitude and Cold Region 2018, 24(6): 112-113.  DOI: 10.3969/j.issn.1006-8082.2018.06.029 Abstract ( )   PDF (250KB) ( )   A field experiment was carried out to explore the effects of direct sowing and transplanting on growth and yield of rice in Heihe city in 2016-2017, the early maturing rice variety Heigeng 10 was used as material. The results showed that both types of cultivation could be mature safely in Heihe city, Heigeng 10 will have a broad prospect for direct sowing in local areas.

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Breeding and Application of a New Japonica Rice Xingeng 18 with High Yield and Good Quality 2018, 24(6): 114-115.  DOI: 10.3969/j.issn.1006-8082.2018.06.030 Abstract ( )   PDF (292KB) ( )   Xingeng 18 is a new japonica rice, derived from female parent Fangxin 1 and male parent Zhendao 88. It was approved by Henan Provincial Crop Variety Approval Committee in 2016. It shows the charateristics of high yield, high quality and better resistance in regional trial and production test. The high yield and good quality cultivation techniques of Xingeng 18 are suitable sowing, reasonable planting density, balanced fertilization and timely harvesting.

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Breeding and Key Cultivation Techniques of Jianghangsimiao with Good Quality 2018, 24(6): 116-117.  DOI: 10.3969/j.issn.1006-8082.2018.06.031 Abstract ( )   PDF (377KB) ( )   New rice variety Jianghangsimiao was selected by system breeding, derived from the progeny of new good strain Huahang 35, which was bred through cross breeding of new germplasms H-31 and Huahang 131. It was approved by Guangdong Provincial Variety Approval Committee in 2017. It has the characteristics of high and stable yield, dwarf and strong stem, lodging resistance, disease resistance, wide adaptability and good eating quality. The grain quality reached the National standard and Guangdong standard of quality 1. It is suitable for planting as early and late season rice in all Guangdong province except northern area.

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Analysis on Combining Ability of Main Economic Characters of Three-line Sterile Line De66A 2018, 24(6): 118-121.  DOI: 10.3969/j.issn.1006-8082.2018.06.032 Abstract ( )   PDF (410KB) ( )   In order to analyze the combining ability of major economic characters of three-line sterile line De 66A, 18 cross combinations from 3 sterile lines and 6 restorer lines were used by the 3×6 NCII genetic mating design. The results showed that the general combing ability value （GCA） of effective panicles, 1 000-grain weight, seed setting rate and grain weight per plant of De 66A were significantly higher than Ganxiang 1A and Luxiang 618A. The special combining ability value of effective panicles, 1 000-grain weight and grain weight per plant of De 66A/ Chenghui 727 were the highest in all of 18 hybrid combinations. 18 hybrid combinations heterosis of main economic traits were greatly influenced by the sterile lines than the restorer lines. The narrow sense heritability ranged from great to small as follows: grain weight per plant, effective panicles, seed setting rate, 1000-grain weight, panicle length and full grain per panicle.

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Present Situation of the Union of Specialized Cooperatives of Grain and Oil in Ruian City and Its Countermeasures 2018, 24(6): 122-124.  DOI: 10.3969/j.issn.1006-8082.2018.06.033 Abstract ( )   PDF (498KB) ( )   The union of specialized cooperatives of grain and oil is one of the main bodies of new-type agricultural management. The author has investigated the operation of seven unions in the past two years, and collected some data. This paper analyzed the present situation of the union of specialized cooperatives of grain and oil in Ruian city, and put forward some countermeasures and suggestions.