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20 November 2017, Volume 23 Issue 6 Previous Issue    Next Issue

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Analysis on Characteristics of Rice Varieties Registered in China in 2016 2017, 23(6): 1-6.  DOI: 10.3969/j.issn.1006-8082.2017.06.001 Abstract ( )   PDF (624KB) ( )   492 rice varieties, including 36 conventional indica rice, 137 two lines indica hybrid rice, 166 three lines indica hybrid rice, 87 conventional japonica rice, 25 japonica hybrid rice, 41 sterile lines, were registered by Crop Variety Approval Committee in China in 2016. Average yield of conventional indica rice was 501.36 kg/667 m2, increased by 3.86% compared with the control; two lines indica hybrid rice was 592.54 kg/667 m2, increased by 5.46% compared with the control; three lines indica hybrid rice was 552.96 kg/667 m2, increased by 5.16% compared with the control; conventional japonica rice was 624.94 kg/667 m2, increased by 7.48% compared with the control; japonica hybrid rice was 651.96 kg/667 m2, increased by 8.91% compared with the control. The quality of japonica rice was significantly better than indica rice; the quality of conventional rice was significantly better than hybrid rice. The quality compliance rate of japonica rice was 51.79%, indica rice was 43.95%, conventional rice was 56.91%, hybrid rice was 41.77%. Some varieties with good resistance to single disease were listed.

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Progress on High Folate Content Rice 2017, 23(6): 7-12.  DOI: 10.3969/j.issn.1006-8082.2017.06.002 Abstract ( )   PDF (760KB) ( )   Folates deficiency is a global public health problem, has profound effects on human health. Rice is the most important staple crops in the world, and provides most population energy intake in China. Since rice seeds contain very little folates, enhancing folates content in rice would be a cost-effective way to solve folates deficiency in China and some countries and regions where the staple crop is rice. This review introduced the structure and physiological functions of folates, and the influences of folates deficiency. The biosynthetic pathway in plant and progress in folates-biofortification rice were also reported.

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Research Progress on Effects of Cultivation Method on Quality of Rice 2017, 23(6): 13-18.  DOI: 10.3969/j.issn.1006-8082.2017.06.003 Abstract ( )   PDF (883KB) ( )   More and more attention has been paid to the quality of rice. This paper summarized the research results of cultivation measures on rice quality in China since the beginning of this century and sumed up the production technology of high quality rice from sowing date, density, planting methods, fertilizer, water management, planting and breeding patterns, and so on.

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Research Progress on Nondestructive Rapid Nutrition Diagnosis of Crop Nitrogen 2017, 23(6): 19-22.  DOI: 10.3969/j.issn.1006-8082.2017.06.004 Abstract ( )   PDF (525KB) ( )   The nitrogen nutrition diagnosis method is divided into chemical diagnosis and nondestructive testing diagnosis. Chemical diagnosis includes the diagnosis of total nitrogen and rapid diagnosis of nitrate acid of plant; nondestructive testing diagnosis includes Chlorophyll fluorescence dynamic research method, Chlorophyll meter method, machine vision, and spectral remote sensing and so on. According to the development method of crop nitrogen nutrition diagnosis, the authors summarized the merits and demerits of the crop nitrogen nutrition diagnosis methods, and put forward the fast diagnosis technology as nitrogen nutrition test method for crop production, which has a wide range of research and application prospects.

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Effects of Planting Density with Bowl Mechanical-transplanting Method on Yield and Population Quality of Double-cropping Late Rice 2017, 23(6): 23-31.  DOI: 10.3969/j.issn.1006-8082.2017.06.005 Abstract ( )   PDF (1374KB) ( )   In order to study the effects of planting density with bowl mechanical-transplanting method on yield and population quality of double-cropping late rice and identify the suitable planting density, a field experiment was conducted using indica hybrid rice Wufengyou T025, indica-japonica hybrid rice Yongyou 538 and conventional japonica rice Xiaoyechishu with five planting densities （D1, 33 cm ×12 cm; D2, 33 cm ×13 cm; D3, 33 cm ×14 cm; D4, 33 cm ×15 cm; D5, 33 cm ×16 cm）, and the conventional blanket seedling mechanical-transplanting as control（CK, 30 cm×13.2 cm）. The experimental results were as follows: （1）The yield of the three types of rice increased with the increase of the density, under the same density, the yield of D1 treatment was significantly higher than that of CK, and the average yield of two years increased by 8.13%~9.50%; （2）The number of stems and tillers of nutrition bowl mechanical-transplanting rice were D1>D2>D3>D4>D5, compared with CK, slower reducing rate of tillers after jointing, higher ratio of productive tillers to total tillers at maturity; （3）Dry matter accumulation, population growth rate and photosynthetic potential of nutrition bowl mechanical-transplanting of three type rice were D1>D2>D3>D4>D5 during transplanting to jointing, jointing to heading, heading to maturity, the dry matter accumulation and photosynthetic potential of CK were larger than that of D1 from transplanting to jointing, but the dry matter accumulation, population growth rate and photosynthetic potential of D1 were higher than that of CK from jointing to heading and heading to mature; （4）Dry matter weight of population of nutrition bowl mechanical-transplanting rice during the main growth period showed D1>D2>D3>D4>D5, but the dry matter weight of per stem performed opposite trends; （5）Leaf area index of nutrition bowl mechanical-transplanting rice during the main growth period and the ratio of effective leaf area, ratio of leaf area from flag leaf to 3rd leaf, the ratio of grain to leaf at heading showed a rising trend with the increase of density, the ratio of effective leaf area, ratio of leaf area from flag leaf to 3rd leaf and the ratio of grain to leaf of D1 was significantly higher than that of CK at heading. The results showed that the density of 33 cm×12 cm with bowl mechanical-transplanting of double-cropping late rice is most appropriate.

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Research Progress on the Theory and Technology of “Changing Indica Rice to Japonica Rice” in South Henan 2017, 23(6): 32-36.  DOI: 10.3969/j.issn.1006-8082.2017.06.006 Abstract ( )   PDF (672KB) ( )   This paper briefly introduced the basic situation and theoretical and technological progress of “changing indica rice to japonica rice” in the south of Henan Province. High temperature, rice blast and sheath blight, the three generation of stem borer damage were the three obstacle factors to the low yield and poor quality of japonica rice in South Henan, and early sowing was the root cause, delaying sowing time of japonica rice was the key technology of “changing indica rice to japonica rice”; institutional defects of “indica rice-wheat ”rotation in south Henan could be repaired by delayed sowing time of japonica rice, reduction of output because of the long seedling age transplanting, mechanical transplanting and throw-planting difficult to utilize could be solved; to increase production and improve quality, to adapt to mechanization, light simplification and large-scale production, was the inevitable choice for “changing indica rice to japonica rice ”; “east japonica rice to west ” was an effective way to solve variety utilization of japonica rice in southern Henan; mechanical transplanting and throw-planting were in favor of realizing delaying sowing of japonica rice, and “silt open seedling raising” solved the problem of raising seedlings under high temperature conditions, and improved the seedling quality; rice blast, sheath blight and yellow borer were not the devastating diseases and insect pest in “ changing indica rice to japonica rice” in delayed sowing of japonica rice, bakanae disease, stem tip nematode, rice thrips, rice false smut were rising as the main diseases and insect pests; the two-stages cultivation was a cultivation method of directional cultivation accordance with the vegetative growth and reproductive growth, based on the growth and development of high yield of rice, designed from rice population, shapes, function construction. It could get high and stable yield, reduce fertilizer and pesticides.

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Progress on Application of NAC Transcription Factors in Rice Stress Tolerance Genetic Engineering 2017, 23(6): 37-42.  DOI: 10.3969/j.issn.1006-8082.2017.06.007 Abstract ( )   PDF (736KB) ( )   Rice often encounters drought, high salt, low temperature, pathogen stress, which influences the growth and yield of rice.NAC transpription factors are the plant-specific and one of the largest families, which play an important role in regulation of plant growth and a variety of abiotic and biotic stresses response. This paper systematically and comprehensively elaborated the structure, classification and chromosomal location of NAC transpription factors, reviewed the application of NAC transpription factors in plant drought, salt, cold and disease resistance, so as to provide some references for the utilization of NAC transcription factors and stress tolerance genetic improvement and breeding.

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Planting Information Extraction of Rice by Object-oriented Classification Method based on GF-1 Images 2017, 23(6): 43-46.  DOI: 10.3969/j.issn.1006-8082.2017.06.008 Abstract ( )   PDF (960KB) ( )   Rice planting information extraction by remote sensing is an important part of agricultural remote sensing. GF-1 satellite WFV data provides a new way for agricultural information extraction, object-oriented classification method is an important method of remote sensing interpretation. This research takes Yangzhou as the research area, based on the GF-1 image data, uses the object-oriented classification method, extracts the rice planting information, and carries on the field investigation verification test result. The feasibility of GF-1 data oriented object classification in extracting rice planting information and the factors affecting extraction precision are discussed. The results showed that GF-1 data can be used to extract rice planting information in Yangzhou by object-oriented classification method. Rice planting area was 214 524 hm2 in Yangzhou City, the overall accuracy of rice was 98.5%, Kappa coefficient was 0.95, area accuracy was 97.5%. Field investigation can improve the extraction accuracy. The degree of terrain fragmentation affects the extraction accuracy, with the decrease of terrain fragmentation, the extraction accuracy is increased.

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Effects of High Temperature on Germination Rate of Rice Seed 2017, 23(6): 47-52.  DOI: 10.3969/j.issn.1006-8082.2017.06.009 Abstract ( )   PDF (603KB) ( )   The effects of high temperature on germination rate of rice seed were studied, using the ultra dry seeds, dry seed, fresh seed, wet seed, white seed of two early indica rice varieties as materials. The results showed that there were significant differences in high temperature tolerance ability of ultra dry seeds, dry seeds, fresh seeds, wet seeds and white seeds, performance for ultra dry seeds＞dry seeds＞fresh seeds＞wet seeds＞white seeds. The effects of water temperature on germination rate was more significant than temperature. The germination rate was decreased with the increase of treatment temperature and treatment time significantly in a certain range. The seed germination rate of different rice showed the same trend after temperature treatment, but there were also significant individual differences. The seed moisture content restricts the ability of high temperature resistence, the higher the moisture content of seeds, the weaker the resistance to heat.

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Investigation on Precision Bowl Carpet Seedling Raising and Mechine Transplanted Late Season Rice 2017, 23(6): 53-56.  DOI: 10.3969/j.issn.1006-8082.2017.06.010 Abstract ( )   PDF (458KB) ( )   A field experiment was carried out to solve the problems of high sowing rate, bad seedling quality and seriously machine-transplanted damage of late season rice, using indica-japonica hybrid rice Yongyou 538 and Yongyou 1540 as materials. The results showed that compared with conventional carpet seedling raising, the precision bowl carpet seedling raising could reduce the sowing rate, seedling damage rate and leakage rate, raise seedlings with soil. Under the condition of reducing planting density, the leaf area index at heading stage, dry matter accumulation from heading to maturity and effective panicles of bowl carpet seedling machine transplanted rice were higher than that of conventional carpet seedling machine transplanted rice, and the yield were increased by 5.42%~6.40%.

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Effects of Drought in Tillering Stage on Yield of Hybrid Rice and Its Mitigation Techniques 2017, 23(6): 57-59.  DOI: 10.3969/j.issn.1006-8082.2017.06.011 Abstract ( )   PDF (352KB) ( )   The effects of drought in tillering stage on yield and its mitigation techniques were studied in the field in dry-season conditions of Lingshui County of Hainan Province，the medium indica hybrid rice combination Yixiangyou 300 and Chuanguyou 642 as materials. The results showed that the effective panicles and spikelets per panicle were significantly reduced by drought in tillering stage, which were the main factors of yield lost. The average soil moisture content during the drought stage can be used as the basis for predicting the yield loss. The yield increased with the increase of nitrogen rate and transplanting density. The yield loss degree of drought in tillering stage could significantly reduce by appropriate nitrogen rate and transplanting density.

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Effects of Salt Stress on Seed Germination and Seedling Growth of Different Wild Rice 2017, 23(6): 60-63.  DOI: 10.3969/j.issn.1006-8082.2017.06.012 Abstract ( )   PDF (520KB) ( )   The effects of different concentrations of NaCl on seed germination and seedling growth of wild rice were studied with 3 wild rice varieties （series） and conventional rice variety Jigeng 301 （CK）. The results showed that the effects of low concentration of salt stress on seed germination and seedling growth of wild rice and conventional japonica rice was different. When the concentration of NaCl≤0.3%, the effects of salt stress on seed germination and seedling growth of wild rice were little, but it improved the seed germination and seedling growth of Jigeng 301; when the concentration of NaCl≥ 0.5%, with the increase of NaCl concentration, the germination rate, length of root, the height of seedling, root/shoot ratio of wild rice were decreased; the concentration of NaCl had a negative correlation with the germination rate of wild rice; the inhibitory effect of NaCl on the root of wild rice seedling was stronger than that of seedlings; different wild rice varieties had different tolerance to NaCl solution, from big to small, which is MY-3, Yanyinhong, HY-1.

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Effects of Meteorological Factors on Rice Sheath Rot in Cold Region 2017, 23(6): 64-65.  DOI: 10.3969/j.issn.1006-8082.2017.06.013 Abstract ( )   PDF (396KB) ( )   In order to define the main meteorological factors affecting the occurrence of rice sheath rot in Heilongjiang Province, the authors investigated the occurrence of rice sheath rot from 2007 to 2016 by the point-survey way, and collected the meteorological factors and disease index during rice sheath rot occurrence period. By means of path analysis, the meteorological factors and the disease index of rice sheath rot were studied. The results showed that the average temperature in August was the most influential meteorological factor to rice sheath rot, followed by the average rainfall in August and the average sunshine hours in September. The test results lay a foundation for the proper control of rice sheath rot disease.

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Effects and Countermeasures of Waterlogging on Growth and Yield of Rice at Regreening Stage 2017, 23(6): 66-68.  DOI: 10.3969/j.issn.1006-8082.2017.06.014 Abstract ( )   PDF (370KB) ( )   In order to explore the effects of complete plant submergence at regreening stage on growth and yield of japonica rice, the authors conducted a systematic investigation. The results showed that, with the increasing of complete plant submergence duration at regreening stage, the plant height decreased, initial heading stage delayed, the effective panicles, grains per panicle, thousand grain weight and yield decreased. The longer the flooding last, the deeper of the damage would be. But the rice plant can be utilized within 5-days of submergence. Severe flooding field could choose the short growth period varieties with machine transplanting or water direct seeding.

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Effects of Plant Immune Inducer ATaiLing on the Seedling Quality and Yield of Hybrid Rice 2017, 23(6): 69-72.  DOI: 10.3969/j.issn.1006-8082.2017.06.015 Abstract ( )   PDF (658KB) ( )   In order to explore the effects of plant immune inducer Atailing on the seedling quality and yield of hybrid rice, a field experiment was carried out, using the ratooning rice cultivar Liangyou 6326 as material. The results showed that, Atailing could not only improve the rice germination rate and seedling quality, and enhance the ability of resistance to rice sheath blight, but also increase the yield and economic efficiency of rice, the treatment of seed soaking with Atailing diluted 800 times was the best treatment.

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Comparison of Grain Moisture Analyzer for Direct Determination of Fresh Wet and Dry Grains of Rice 2017, 23(6): 73-75.  DOI: 10.3969/j.issn.1006-8082.2017.06.016 Abstract ( )   PDF (267KB) ( )   Taking grain samples after harvesting, the weights and moisture contents of gross wet grain, net wet grain and net dry grain were measured. The results showed that the drying rate and standard moisture yield of gross wet grain were higher than net dry grain when application of grain moisture measuring instrument for direct measurement. Under the experimental conditions, the average drying rate and yield of gross wet grain were increased by 2.8 percentage points and 3.3% respectively.

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Effect of Enzyme Reagent on Pesticide Residue of Rice 2017, 23(6): 76-79.  DOI: 10.3969/j.issn.1006-8082.2017.06.017 Abstract ( )   PDF (579KB) ( )   There are great effects of pesticide residues on rice quality and people's health. Through the introduction of an enzyme reagent, a study was carried out to explore the effects of using time and dosage of the reagent on pesticide residue in rice. The results showed that the suitable dosage of the enzyme reagent was 5 400~9 000 mL/hm2 and applied in 5 days before heading and after heading, could reduce the pesticide residue, different varieties had different suitable dosages.

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Current Status of Rice Industry in Thailand and Its Revelation 2017, 23(6): 80-83.  DOI: 10.3969/j.issn.1006-8082.2017.06.018 Abstract ( )   PDF (571KB) ( )   We analyzed the current status of rice production, rice research, rice processing and quality control technology in Thailand. Combining the actual situation of rice industry in Guangdong Province, we put forward some suggestions for future development of the rice industry in Guangdong Province.

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Effects of Sowing Method and Planting Density on Yield and Photosynthetic Production of Carpet Seedling Machine Transplanting Rice 2017, 23(6): 84-87.  DOI: 10.3969/j.issn.1006-8082.2017.06.019 Abstract ( )   PDF (459KB) ( )   The effects of different sowing method and planting density on the yield and photosynthetic production of machine transplanting rice were studied, using Nangeng 9108 as material. The results showed that, compared with conventional sowing method, the yield of printing-sowing method was increased by 1.9%~6.3% significantly, which depended on the long growth period, great amount of spikelets in population and higher accumulation of dry matter. The suitable low planting density was easier to acquire higher yield under printing-sowing method with machine transplanting, and the best plant spacing was 30.0 cm ×13.0 cm.

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Study on 13.50 t/hm2 High Yield Cultivation Techniques of indica-japonica Hybrid Rice Yongyou 12 on a Large Scale 2017, 23(6): 88-89.  DOI: 10.3969/j.issn.1006-8082.2017.06.020 Abstract ( )   PDF (281KB) ( )   Yongyou 12 is an indica-japonica hybrid rice, it has the characteristics of ideal plant type, large panicle and more grains, high seed setting rate, high and stable yield, good grain quality and multiple resistance, and made a new record with an average yield of 14.56 t/hm2 in a larger area of 7.8 hm2 in 2016 in Jiangshan city, Zhejiang province. In this paper, the characteristics and the high yield cultivation techniques of Yongyou 12 were introduced.

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Preliminary Study of Bud Fertilizer on Agronomic Characteristics and Yield of Regeneration Season of Huanghuazhan 2017, 23(6): 90-92.  DOI: 10.3969/j.issn.1006-8082.2017.06.021 Abstract ( )   PDF (550KB) ( )   A field experiment was carried out to explore the effects of bud fertilizer on agronomic traits and yield formation of ratoon rice, using Huanghuazhan as material, urea as nitrogen fertilizer. The results showed that: in the application of the same seedling fertilizer （urea 225 kg/hm2） conditions, with the increase of the amount of bud fertilizer, the yield, plant height, ear length, spike rate and final regeneration rate of Huanghuazhan were increased in the regeneration season, and the grains per panicle and seed setting rate were increased first and then decreased, but 1 000-grain weight had no obvious change. There were significant positive correlation between the amount of bud fertilizer and the yield and effective panicles of Ratoon rice. When bud fertilizer is 300 kg/hm2, the yield of ratoon rice was the highest（4 633.8 kg/hm2）, and increased by 22.69% compared with no bud fertilizer treatment.

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Study on Application Period and Control Effects of Frequently-used Fungicides on Rice Blast 2017, 23(6): 93-96.  DOI: 10.3969/j.issn.1006-8082.2017.06.022 Abstract ( )   PDF (466KB) ( )   Rice blast is the main rice disease, and chemical control is the most effective measures at present. This study tested the control effects of some rice blast control specific fungicides and broad-spectrum fungicides, discussed the optimal control period of rice blast, the possibility of combination control rice false smut and rice neck blast through the method of field control experiment combination with indor test. The results showed that tricyclazole was still the best fungicide to control rice neck blast. The broad-spectrum fungicides, such as azoxystrobin, trifloxystrobin·tebuconazole and azoxystrobin·difenoconazole, showed better performance in controlling leaf blast; initial heading stage was the best stage for controlling rice neck blast, it was necessary to give another chemical spray in full heading stage when neck blast very serious. 5~7 days before heading stage was the best stage to control false smut of rice, there was also some effects for controlling rice neck blast. Therefore, it is feasible to control rice neck blast and rice false smut at one time.

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Effects of Different Seedling Ages on Seedling Quality and Yield Components in Double-cropping Late Rice in Middle and Lower Reaches of Yangtze River 2017, 23(6): 97-100.  DOI: 10.3969/j.issn.1006-8082.2017.06.023 Abstract ( )   PDF (545KB) ( )   The effects of different seedling ages on seedling quality, growth, tillering dynamics and yield components of double-cropping late rice in the Yangtze River were studied in this paper, by blanket-seedling mechanical transplanting technique, using Shangnonggeng 2 and Zhendao 18 as materials. The results showed that the number of green leaves, stem width and root trophic force of the two cultivars increased gradually with the increase of seedling age. Compared with the 20 days, 24 days and 28 days seedling age treatments, the maturity date of 32 days seedling age treatment was earlier 4~5 days, and the tiller peak stage was 15 days in advance, the seed setting rate was significantly increased. Compared with the 24 days seedling age treatment, the yield of Shangnonggeng 2 and Zhendao 18 of 32 days seedling age treatment increased by 10.26% and 20.82%, respectively. The seedling age of blanket-seedling mechanical transplanting in the Yangtze River could extend to 32 days.

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Effect of Different Nutritional Soil on Seedling Quality of Early Rice 2017, 23(6): 101-103.  DOI: 10.3969/j.issn.1006-8082.2017.06.024 Abstract ( )   PDF (357KB) ( )   A field experiment was carried out to explore the effects of different nutritional soil and fertilizer rate on seedling quality and yield of early rice, using Zhongzao 39 as material. The results indicated that seedbed fertilization had significant effects on seedling quality and yield. Using native yellow soil for seedling raising with 12 g/disc fertilizer or local farmland soil seedling raising with 8 g/disc fertilizer would get better seedling quality and higher yield.

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Performance of the Stigma Traits of Indica PTGMS Lines 2017, 23(6): 104-107.  DOI: 10.3969/j.issn.1006-8082.2017.06.025 Abstract ( )   In order to investigate and contrast the stigma characters of indica PTGMS Lines, using 5 indica PTGMS as materials, we observed and measured the exposure rate of stigma, stigma length, stigma width, stigma size, stigma volume and stigma vigor. The results showed that the stigma characters performance of F168S was best, then followed by Xinai10-4S, Aiqing 34S, Guangzhan 63-4S, Xinfeng 9826S, based on the exposure rate of stigma as the primary index.

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Effects of Mixed Sowing Amount on Seedling Quality and Yield between Longgeng 39 and Longgeng 31 2017, 23(6): 108-110.  DOI: 10.3969/j.issn.1006-8082.2017.06.026 Abstract ( )   PDF (314KB) ( )   The mixed cropping way of 4∶6 proportion between Longgeng 39 and Longgeng 31 is widely used in the third temperature zone of Heilongjiang Province, the effects of different sowing amount on seedling quality and yield were studied in this paper. The results showed that, with the increase of seeding amount, seedling height increased, leaf number, root number, stem width, stem plumpness, and dry weight and fresh weight decreased, while the root set strengthened, disease rate and disease index of seedling blight increased. The yield of the treatment by 110 g/disk dry seed was the highest, up to 9 282.45 kg/hm2.

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Effects of Different Treatments of Preparation on Seedling Quality of Rice 2017, 23(6): 111-113.  DOI: 10.3969/j.issn.1006-8082.2017.06.027 Abstract ( )   PDF (424KB) ( )   The results of pot experiments showed that there were no significant difference of the seed germination rate, root length and plumule length of hybrid combination Yongyou 12 and Zhongzheyou 1 when the seeds were treated with Luoxiaowang dilution suspension. There were also no evident difference of the seedling height, root length, fresh weight of overground part and underground part when the seedlings were sprayed with Luoxiaowang but without combined using of nitrogen fertilizer. However, when Luoxiaowang was sprayed after application of urea fertilizer, the plant height, fresh weight of overground part and underground part, and chlorophyll content were significantly higher than the treatments with Pulvtong, Keshade-3000 and the blank control （fresh water） after 10 day application. In conclusion, the experimental results indicated that the conbination of Luoxiaowang and urea could improve the fertilizer efficiency, rice resistance to pests, promote the growth of roots and plants, improve tillers of rice, and has long durability of efficiency.

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Application Effects of Mechanical Planting Technique of Bowl-blanket Rice Seedling in Xinjiang 2017, 23(6): 114-116.  DOI: 10.3969/j.issn.1006-8082.2017.06.028 Abstract ( )   PDF (341KB) ( )   Application effects of mechanical planting technique of bowl-blanket rice seedling in Xinjiang were discussed with Xindao 11 as material, through the field comparison trial. The results showed that, compared with the conventional ordinary flat plug seedling, the yield of bowl shaped blanket seedlings machine-transplanted rice increased by 7.74%, the benefits increased by 177.99 Yuan/667 m2; compared with the traditional artificial seedling transplanting by hand, the yield of bowl shaped blanket seedlings machine-transplanted rice increased by 13.04%, the benefits increased by 383.04 Yuan/667 m2.

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Breeding Status and Development Strategy of Fragrant Rice in Guangxi Province 2017, 23(6): 117-120.  DOI: 10.3969/j.issn.1006-8082.2017.06.029 Abstract ( )   PDF (464KB) ( )   In order to find the present situation and existing problems of fragrant rice breeding in Guangxi Province, the yield, quality and resistance of the fragrant rice varieties which were bred in Guangxi Province since 2000 to 2016 were analyzed. The result showed that there were small number of fragrant rice varieties bred by Guangxi Province, and these varieties were almost conventional varieties. The high quality rate of fragrant rice varieties was low in Guangxi Province, mainly because of the low amylose content. The yields of lately bred rice were higher than early ones, which were mainly through the breeding of large panicle varieties. Most of these fragrant rice varieties had poor resistance to rice blast, the bacterial blight resistance of early rice were stronger than lately rice. From now on, we should strengthen the breeding ability of fragrant rice varieties, especially the breeding ability of hybrid rice varieties, and coordinate the quality indexes of rice varieties; accelerate the research and utilization of identification technology of fragrant rice varieties; strengthen the selection and breeding of fragrant rice varieties with medium-low amylose content, establish the local standards related to high quality rice especially for the amylose content according to market demand in Guangxi Province; improve the resistance to rice blast and so on.

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Problems and Countermeasures of High Quality Rice Industry in Hanzhong City 2017, 23(6): 121-123.  DOI: 10.3969/j.issn.1006-8082.2017.06.030 Abstract ( )   PDF (434KB) ( )   Hanzhong is the main rice producing area in Shaanxi Province, and the high quality rice has become the mainstream of people's consumption. This article elaborated the present situation and significance of developing high quality rice industry in Hanzhong City, analyzed the main problems and put forward the main measures to promote the high quality rice industry in Hanzhong City.