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20 November 2015, Volume 21 Issue 6 Previous Issue    Next Issue

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Metabolomics Research Strategies of Rice Based on GC-MS CHEN Dong-Mei-＃, LI Zhong-＃, ZHANG Zhi-Xing, LIN Wen-Xiong-* 2015, 21(6): 1-6.  DOI: 10.3969/j.issn.1006-8082.2015.06.001 Abstract ( )   PDF (1300KB) ( )   With the continuous development of modern molecular biology techniques, the use of systems biology methods in plant research is promoted in recent years. Taking rice grain as materials, this study based on GC - MS metabonomics method, combining statistics and bioinformatics analysis （heat map, PCA, S - the Plot and MetPA, etc.）, puts forward a set of methods of extracting for rice metabolites, discusses the applicable to rice metabolomics research strategy. This study provides a technical support for revealing the mechanism of plant growth and the molecular mechanism to adapt to adversity in the future.

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Analysis on Characteristics of Rice Varieties Registered in China in 2014 2015, 21(6): 7-12.  DOI: 10.3969/j.issn.1006-8082.2015.06.002 Abstract ( )   PDF (573KB) ( )   469 rice varieties, including 188 three lines indica hybrid rice, 96 two lines indica hybrid rice, 36 conventional indica rice, 17 japonica hybrid rice, 122 conventional japonica rice, 10 sterile lines, were registered by Crop Variety Approval Committee in China in 2014. Average yield of three lines indica hybrid rice is 543.45 kg/667 m2, two lines indica hybrid rice is 557.84 kg/667 m2, conventional indica rice is 479.02 kg/667 m2, japonica hybrid rice is 617.97 kg/667 m2, conventional japonica rice is 612.86 kg/667 m2. Quality compliance rate of japonica rice（63.31%） was significantly better than indica rice（39.38%）, conventional rice quality compliance rate（61.39%） was significantly better than hybrid rice（38.87%）. Varieties with excellent resistance to diseases and insect pests are less.

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The Influence of Different Climatic Ecological Conditions on Rice Quality Traits in Northern China WANG Jiao-1 2 3, WANG Jie-2, QIANG Ai-Ling-3, GUAN Jing-De-4, SUN Guo-Cai-5, SUN Jian-Chang-3, QI Guo-Feng-6, WANG Xing-Sheng-3*, HAN Long-Zhi-2* 2015, 21(6): 13-18.  DOI: 10.3969/j.issn.1006-8082.2015.06.003 Abstract ( )   PDF (736KB) ( )   Taking the rice varieties in northern rice regional test as experimental materials, seven quality traits of medium and early maturity rice variety groups in Yongning site （Ningxia） and Kaiyuan site （Liaoning） from 2001 to 2013 were analyzed. The results showed that the head rice rate and gel consistency in Kaiyuan site are significantly higher than Yongning site, the chalky rice rate and chalkiness degree in Yongning site are significantly lower than Kaiyuan site. There are no significant difference between two sites regarding brown rice rate, milled rice rate and amylose content. Within seven quality traits, the coefficient of variation for the chalky rice rate and chalkiness degree are relatively larger, the coefficient of variation for the head rice rate, amylose content and gel consistency are the medium, the coefficient of variation for the brown rice rate and milled rice rate are relatively smaller. Comparison of the meteorological factor between Yongning site and Kaiyuan site during the heading and filling stage from August to September were conducted, which shows that the mean temperature, max temperature, min temperature and hours of sunshine are similar in two sites. The dekad precipitation and relative humidity in Yongning site are significantly lower than Kaiyuan site. The results of the correlation analysis for rice quality traits and meteorological factors shows that the rice quality traits is more closely related to the meteorological factor in September than in August. The results of the correlation between brown rice rate and relative humidity, head rice rate and relative humidity, head rice rate and the maximum temperature, brown rice rate and precipitation are opposite in Yongning site and Kaiyuan site, which may be caused by the different relative humidity and precipitation in two sites. Therefore, the complexity of the rice quality is the results of coupling effects under different climate ecological background.

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Effect of Different Cultivation Models on Nutrient Uptake and Utilization and Source-sink Characteristics of Mid-season Hybrid Rice Combination in Winter Water-logged Field  2015, 21(6): 19-27.  DOI: 10.3969/j.issn.1006-8082.2015.06.004 Abstract ( )   PDF (888KB) ( )   The variations of grain yield, source-sink characteristics, dry matter and N, P, K distribution in different organs of above ground plants of mid-season hybrid rice were studied in winter water-logged field. The experiment was conducted with 20 mid-season hybrid rice combinations grown in 3 cultivation models of high-density with low-fertilization（HL）, mid-density with mid-fertilization （MM） and low density with high fertilization （LH）, in a randomized block design with 3 replications. Data were analyzed by the variance and regression.The results showed that the effects of cultivation models and hybrid rice combinations on grain yield and dry matter weight in different organs of above ground plants were much greater than on the N、P、K content. Meanwhile, the effects of cultivation models were bigger than that of hybrid rice combinations. Grain yield and dry matter weight showed HL＞MM＞LH, harvest indexes showed HL＜MM＜LH. N and P were mainly distributed in grain, and K were mainly distributed in stems; N use efficiency showed HL＞MM＞LH, P and K use efficiency showed HL＜MM＜LH. Mid-large panicle type hybrid rice combinations with low chlorophyll content, high spikelets-leaf ratio, high 1 000-grain weight and high grain yield at full heading, had high use efficiency of N, P and K.

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Effects of Biochemical Reagents on Yield, Physiological and Ecological Characteristics of Mechanical-transplanting Rice 2015, 21(6): 28-31.  DOI: 10.3969/j.issn.1006-8082.2015.06.005 Abstract ( )   PDF (624KB) ( )   Using Nanjing 9108 as the experimental material, setting different treatments by spraying 1.5 L/hm2 Jingfeng, 60 g/hm2 bihu, 675 g/hm2 Aizhuangfeng, 750 g/hm2 potassium dihydrogen phosphate, 15 g/hm2 gibberellic acid to study the effects of these treatments on rice yield, physiological and ecological characteristics of blanket seedling mechanical- transplanting rice and nutrition bowl mechanical-transplanting rice. The results showed that aizhuangfeng, potassium dihydrogen phosphate and bihu can increase the rice yield. Aizhuangfeng increases the grain number per spike, seed setting rate and 1 000-grain weight significantly, the rice yields of the two mechanical- transplanting methods are 12.71% and 10.39% higher than the contrast respectively. The nutrition bowl mechanical- transplanting rice has an advantage in the population growth at anaphase and has more dry matter. The yield of nutrition bowl mechanical- transplanting rice is 6.95% higher than blanket seedling mechanical- transplanting rice on average.

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Research on Relationships of Yields and Population Indexes of Different Growth Stage of Rice 2015, 21(6): 32-36.  DOI: 10.3969/j.issn.1006-8082.2015.06.006 Abstract ( )   PDF (566KB) ( )   Effects of fertilizer, transplanting density and planting density on rice yield and leaf area index, stem dry weight and total dry weight of different growth stage were studied using rice variety Mudanjiang 32 and Muxiang 1 as experimental materials. The results showed as follows: the relationships between yields and leaf area index were different at different growth stage. The optimum leaf area index of the grain-filling stage was smallest and fulfilled easily, which would caused yield decreasing when the leaf area index was too big in this stage, and the optimum leaf area index of the mature stage was also small, which was hard to reach because of leaf senescence; among the yield components, leaf area index was significantly positive correlation with the number of panicle, while was negative correlation with the grain number per panicle and 1 000-grain weight, which could be the reason for yield limited improvement with the increase of leaf area index; the stem dry weight and plant total dry weight were also significantly positively correlation with the yield and the number of panicle, but the correlations of different stages were not the same. The study also found that the leaf area index, stem dry weight and total weight in the whole growth were significant positive correlated, and the correlation between total dry weight and leaf area index was smallest in the mature stage, the correlation between total dry weight and stem dry weight was smallest in the grain-filling stage; the differences of the variation coefficient of leaf area index, stem dry weight and total dry weight of different growth stage were obvious, which indicated that we should determine the relations between yield and leaf area index, stem dry weight and the total dry weight according to the different growth stage; the variation of 1 000-grain weight was the smallest and grain number per panicle was the second, while the variation of yield and the number of panicle were bigger.

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Comparative Studies on Benefit of Rice Production in Zhejiang Province 2015, 21(6): 37-40,44.  DOI: 10.3969/j.issn.1006-8082.2015.06.007 Abstract ( )   PDF (640KB) ( )   Based on the cost-benefit data of rice production in Zhejiang Province from 2004 to 2013, this paper investigated the changes of the cost- benefit of rice production in the past decade, and the differences among varieties and seasons. The results showed that: （1） rice production cost increased greater than the market price, resulting in cost driven price increases in the rice market. （2） the profit margin of double-crop indica rice was lower than the single-crop japonica rice, the trend of single cropping and the preference of japonica rice will be more obvious. （3） with a relative higher profit margin, scale management is the fundamental way to improve rice benefits. （4） it becomes more and more difficult to maintain the rice planting area due to the declining profit margin for rice production. Finally, some suggestions are put forward to improve the benefit of rice production in Zhejiang Province.

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The Development of Rice Breeding in Xinjiang 2015, 21(6): 41-44.  DOI: 10.3969/j.issn.1006-8082.2015.06.008 Abstract ( )   PDF (436KB) ( )   The rice breeding development and the change of rice quality in Xinjiang were researched in this paper, the rice varieties data as the foundation from 1977 to 2014 in Xinjiang, it is of great significance to rice sustainable development, improve the efficiency of rice planting and the farmers’income of Xinjiang.

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The Control Technologies and Fungicides Screening for Rice False Smut Ustilaginoideavirens 2015, 21(6): 45-51.  DOI: 10.3969/j.issn.1006-8082.2015.06.009 Abstract ( )   PDF (859KB) ( )   Field trial for screening fungicides of controlling rice false smut （RFS）（Ustilaginoideavirens） which seriously occurred and damaged increasingly in rice production were carried out. The effects of different stage of pesticide application and different application methods on the control efficacy were investigated. The results indicated that the best control efficacy of fungicide NXF2014-12 to RFS when the use dosage of 750 g/hm2. The control efficacy of panicle infected rate and disease index rate were 78.32% and 83.30%, respectively. The control efficacy of NXF2014-12 to RFS was significantly higher than the control of fungicide 23% kresoxim-methyl·epoxiconazolesuspension concentrate （SC）. Pesticide application for the first time was implemented at the growing stage of “level phyllula”or “zero distance of phyllula”of most rice plants, and second spray of fungicide was carried out at breach stage or begin heading stage （in this experiment, the rice variety was indica / japonica hybrid combination Yongyou 12, the second spraying was actually at 10 d after first application） of the first time pesticide application. The control efficacy of first time pesticide application at “level phyllula”of most rice plants was better than that of the caulis. Fine spray and thick spray were carried out for the first time at “level phyllula” of most rice plants, and second spray was implemented 10 days after first application，the control efficacy both of panicle infected rate and disease index rate show no significantly difference. In order to achieve the ideal control efficacy in rice production, it is necessary to select the special chemicals and spray enough dosage of suspension according to the control targets and their occurred site on the rice plants’ parts and adopt different application methods.

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Analysis of Rice Varieties of Chongqing in Recent Five Years 2015, 21(6): 52-53.  DOI: 10.3969/j.issn.1006-8082.2015.06.010 Abstract ( )   PDF (276KB) ( )   The breeding pattern, rice varieties composition, promotional variety types of examination and approval rice varieties in Chongqing in recent five years were analyzed in this paper. The authors puts forward some suggestions for rice breeding according to the results of the analysis, and hope to provide some references for the rice breeding research in Chongqing.

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Comparison of Yield and Quality about Different Panicle Type Rice Variety in Cold Region 2015, 21(6): 54-57.  DOI: 10.3969/j.issn.1006-8082.2015.06.011 Abstract ( )   PDF (479KB) ( )   The yield and quality of different panicle type rice in cold region was compared, with 34 rice varieties in the third accumulated temperature belt of Heilongjiang Province as materials. The results showed that the grain yield performance dense panicle type > semi panicle type > loose panicle type. The grains per spike, the numbers of first and secondary branches and grains of dense panicle type varieties were higher than that of loose panicle type rice and semi panicle type rice. The protein content performance dense panicle type> semi panicle type > loose panicle type. The amylose content and taste value is opposite with the protein content.

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Analysis of Aromatic Rice Varieties in Heilongjiang Province 2015, 21(6): 58-61.  DOI: 10.3969/j.issn.1006-8082.2015.06.012 Abstract ( )   PDF (431KB) ( )   The yields and quality traits of 22 aromatic rice varieties in Heilongjiang Province were analyzed in this paper. The results showed that increase the grains per spike appropriately is conducive to improve the yield. The 1 000-grain weight has less effect on grain yield. There is no variety come up to the first national standard on the quality traits. We should decrease the chalky grain rate and chalkiness degree, and increase the length of gel consistency to improve rice taste. These aromatic rice were mainly bred by Wuyoudao 1 and Suijing 4, the varieties which derived from Wuyoudao 1 are accounted for 36.0% and the varieties derived from Suijing 4 are accounted for 59.0%. The genetic basis of aromatic rice is stenosis, we should widen the germplasm resources of aromatic rice and enrich genetic bases.

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Effects of Different Cultivation Methods on Yield and Dry Matter Production of Late Hybrid Rice 2015, 21(6): 62-65.  DOI: 10.3969/j.issn.1006-8082.2015.06.013 Abstract ( )   PDF (437KB) ( )   The yield, dry matter accumulation and growth characteristics of medium maturing late japonica rice variety Ning 81 were studied under different cultivation methods. The results showed that the yield of Ning 81 with hand-transplanting was higher than that of the other two cultivation methods. Hand-transplanting and machine-transplanting rice got higher spike rate of over 70%. The tiller spikes on the main stem 4 to 7 leaf position had more contribution to yield in throw seedlings and machine-transplanting rice, while the 6 to 8 leaf position had more contribution to yield in hand-transplanting rice. Throw seedlings had more dry matter accumulation in jointing stage than others, in jointing to heading stage, hand-transplanting method performed best, in heading to maturity stage, machine-transplanting method had higher dry matter accumulation.

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Study on High Yied Construction of Songjing 20 and Song 08378 in the First Accumulated Area in Heilongjiang Province 2015, 21(6): 66-71,76.  DOI: 10.3969/j.issn.1006-8082.2015.06.014 Abstract ( )   PDF (810KB) ( )   Using Songjing 20 and Song 08378 as materials, its high yield and fine quality construction were discussed in this paper. The results showed that Songjing 20 and Song 08378 would get high yield when planted with 24 point/m2 and 5 seedlings / point. There was a significant negative correlation between yield and plant spacing. Plant spacing and the number of seedlings had greater effects on the panicle traits and yield components

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Effects of Optimized Fertilizer and Water Management on Yield Formation and Population Quality in Direct-sowing Rice 2015, 21(6): 72-76.  DOI: 10.3969/j.issn.1006-8082.2015.06.015 Abstract ( )   PDF (600KB) ( )   Field experiments were carried out to study the effects of two kinds of fertilizer and water management mode on yield formation and population quality in direct-sowing rice, using Wuyunjing 23 as material. The results showed that: （1） On the basis of access to appropriate panicle number, the grain number per panicle and grain weight increased under optimized management of fertilizer and water. The average yield achieve 619.5 kg/667 m2 by optimized management, increasing 44.5 kg/667 m2 and 7.74 percent compared with the conventional management of fertilizer and water. （2） Through reasonable management of water and fertilizer, optimized management controls the occurrence of low tiller on main stem, boosts median tiller becoming panicle, reduces the peak seedlings, improves the spike rate, promotes strong stalk and big spike, increases dry matter accumulation after heading, and significantly increases the yield of direct-sowing rice.

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Cultivation Techniques and Application of Zhongzao 39 with Yield Exceed 700 kg/667 m2 2015, 21(6): 77-79.  DOI: 10.3969/j.issn.1006-8082.2015.06.016 Abstract ( )   PDF (404KB) ( )   Field experiments were carried out to approach the yield potential and accelerate the pace of promotion of zhongzao 39, based on 3 years of precise and quantitative cultivation and demonstration of machine transplanting rice. In 2013, the yield of zhongzao 39 exceed 700 kg/667 m2, and create a new record of Zhejiang Agricultural Guinness in early rice. The high yield and high efficiency cultivation techniques of zhongzao 39 were summarized.

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Effects of Base Tiller Fertilizer and Panicle Fertilizer Ratio on the Yield of Super Rice 2015, 21(6): 80-82.  DOI: 10.3969/j.issn.1006-8082.2015.06.017 Abstract ( )   PDF (434KB) ( )   The effects of base tiller fertilizer and panicle fertilizer ratio on the yield and yield formation of super rice Tianyou 3618 was studied in the fields. The results showed that the yield of basic tiller fertilizer and panicle fertilizer ratio of 7∶3, 6∶4, 5∶5 treatment significantly higher, compared to ratio of 10∶0, 9∶1, 8∶2 treatment. The main reason for the yield increase was increase of effective panicle number, panicle rate, high harvest index and grain plumpness. Therefore, appropriate increase in panicle fertilizer application rate will increase rice yield.Considering the security of the medium-term fertilization, base tiller fertilizer and panicle fertilizer ratio 7∶3 was the suitable ratio for super rice Tianyou 3618.

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Effects of Different Harvesting Methods and Fertilization Time on Yield of Ratooning Rice 2015, 21(6): 83-84,87.  DOI: 10.3969/j.issn.1006-8082.2015.06.018 Abstract ( )   PDF (357KB) ( )   The effects of different harvesting methods and fertilization time on middle-season rice regeneration season production was compared and analysed. The results showed that the ratooning rice has higher yield by using artificial harvesting method in the first season rice, and application germination fertilizer in 7～10 days before the first season rice harvest.

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Effects of Acid Soil Conditioner on Yongyou 538 2015, 21(6): 85-87.  DOI: 10.3969/j.issn.1006-8082.2015.06.019 Abstract ( )   PDF (396KB) ( )   In order to find out the effects of soil conditioner on soil physical-chemical properties and the yield of continuous cropping late rice, exploit high yield potential of Yongyou 538, the 32% soil conditioner application amount experiment was carried out. The results showed that the yield of Yongyou 538 was accelerated with the increase of soil conditioner application, about 8.31% to 9.52%. The soil conditioners not only improved the chemical and physical properties of acid soil, increased the soil available organic, nitrogen, phosphous and ptotassium, but also increased the effective panicles and 1 000-grain weight. The suitable amount of acid soil conditioner is 600~900 kg/hm2.

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Effects of Silicate Bacterium on Biological Character and Nutrients Accumulation of Rice 2015, 21(6): 88-90,93.  DOI: 10.3969/j.issn.1006-8082.2015.06.020 Abstract ( )   PDF (553KB) ( )   A pot experiment was conducted to study the effect of silicate bacterium on biological character and nutrients accumulation of rice. The results showed that, compared with the control, the root dry weight increased by 30.3%, the spike dry weight increased by 10.1%. Silicate bacterium application significantly increased the nutrient content in the main growth stages of rice, compared with the control, the total nitrogen content increased by 7.4%~31.7%, the total phosphorus increased by 7.4%~14.3%, the total potassium increased by 3.7%~18.3%, the total silicon increased by 5.9%~7.9%. The available silicon content in soil can be maintained at a high level with silicate bacterium application, the content of available silicon in soil increased by 2.8% after the rice harvest. Therefore, silicate bacterium can promote the growth of rice, increase the main nutrient accumulation of rice and the content of available silicon in soil. Silicate bacterium has a good application prospect.

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Effects of Controlled-release Fertilizer on Growth and Yield of Machine Transplanted Rice 2015, 21(6): 91-93.  DOI: 10.3969/j.issn.1006-8082.2015.06.021 Abstract ( )   PDF (368KB) ( )   In the same amount of nitrogen conditions, the tillers, effective panicles and chlorophyll content increased by the application of controlled-release fertilizer in the middle-later period, but the spike rate decreased significantly. The yield of controlled-release fertilizer and urea fertilizer treatment was the highest in machine transplanted rice, and it had no obvious differences with split application of conventional fertilization, but had significant differences with one time application of conventional fertilization.

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Effects of Modified Fertilizer Application on Rice Pests, Diseases and Yields 2015, 21(6): 94-97.  DOI: 10.3969/j.issn.1006-8082.2015.06.022 Abstract ( )   PDF (485KB) ( )   The effects of different fertilization application on rice main pests, diseases and yields of rice were compared by using rice cultivars Zhejing 88 and Chunyou 84 as materials. The results indicated that the population and damage of rice main pests （planthopper and leaffolder） and main diseases （sheath blight and rice false smut） in the fields with modified fertilizer application were significantly lower than those in control fields. Meanwhile, the yields of Zhejing 88 and Chunyou 84 were increased by 7.21% and 1.68%, respectively. The effects of modified fertilizer application, which based on local fertilization application of Xiaoshan district in Hanzhou city, the modified fertilizer application including nitrogen fertilizer applied later, increasing the proportion of nitrogen application during panicle and granular periods and utilizing more phosphatic and potassic fertilizer.

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Demonstration and Exploration of “More Early Rice” Diseases and Pests Control Technology 2015, 21(6): 98-99.  DOI: 10.3969/j.issn.1006-8082.2015.06.023 Abstract ( )   PDF (301KB) ( )   Field trials indicated that “More Early Rice” solution had ideal effects on controlling diseases and pests during the whole rice growth stages, as well as increasing seed setting rate and thousand seed weight, the yield increased by 15.6%, the income increased by 141.6 yuan/667 m2, the pesticides decreased by 195 g/667 m2. This applying pesticide solution has low toxicity, low residue, and significant economic, social and ecological benefits.

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High-yielding Cultivation Techniques of the New Three-line Hybrid Rice Combination Changyoujing 6 2015, 21(6): 100-102.  DOI: 10.3969/j.issn.1006-8082.2015.06.024 Abstract ( )   PDF (375KB) ( )   The high-yielding cultivation techniques of three-line hybrid japonica combination Changyoujing 6 were sunmarized in this paper, by rice precise quantitative cultivation theory as the guide, through the application of soil conditioners, plant amino acid fertilizer and nutrition conditioner. The study will accumulate experience for large area promotion of Changyoujing 6.

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Characteristics and Cultivation Techniques of New Indica Hybrid Rice Combination Jinguyou 3301 2015, 21(6): 103-104.  DOI: 10.3969/j.issn.1006-8082.2015.06.025 Abstract ( )   PDF (268KB) ( )   Jinguyou 3301 is a new indica hydrid rice variety with fine quality and high resistant, bred by Sichuan Agricultural University High-tech Agricultural Co. Ltd. Jinguyou 3301 has excellent characteristics, such as moderate growth period, anti-rice blast, anti-heat with the tolerant of drought, anti-chilling with the tolerant of cold, the characteristic of lodging-resistance, wide adaptability with high and stable yield, especially with high quality rice. The characteristics and cultivation techniques of Jinguyou 3301 were introduced in this paper.

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Planting Performance of Fine Quality Indica Hybird Rice E-zhong 5 in Xiaogan City 2015, 21(6): 105-106.  DOI: 10.3969/j.issn.1006-8082.2015.06.026 Abstract ( )   PDF (311KB) ( )   E-zhong 5 was approved by Hubei Provincial Crop Variety Appraisal Committee in 2004. E-zhong 5 is a late maturity indica rice, the whole growth period is about 148 d, it has stable yield and high yield potential. The production should be strictly in accordance with the implementation of technical regulations for production of high yield and non pollution rice.

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Breeding of New Indica Rice Variety Lirenzi with Brown Rice 2015, 21(6): 107-108.  DOI: 10.3969/j.issn.1006-8082.2015.06.027 Abstract ( )   PDF (294KB) ( )   Lirenzi is a new rice variety with purple-black seed coat, directionally bred from progenies of Zimi 132 crossed with Youfeng 162. It’s an outstanding variety with stable yield, moderate plant height and good plant type, and reached the first class of national standard in black and glutinous rice. This variety was approved by the Hainan Province Crop Varieties Committee in 2013.

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Breeding and Cultivation Techniques of Wuyunjing 31 2015, 21(6): 109-110.  DOI: 10.3969/j.issn.1006-8082.2015.06.028 Abstract ( )   PDF (256KB) ( )   Wuyunjing 31 is a new early-maturing late japonica rice, bred by Jiangsu （Wujin） Rice Research Institute. The new variety has the characteristics of high productivity, good quality, high resistance, suitable maturing stage. The characteristics and high yield cultivation techniques of Wuyunjing 31 were introduced in this paper.

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Characteristics and Cultivation Techniques of “Changnongjing” Series Japonica Rice Combinations 2015, 21(6): 111-113.  DOI: 10.3969/j.issn.1006-8082.2015.06.029 Abstract ( )   PDF (367KB) ( )   “Changnongjing” series japonica rice combinations have the characteristics of high productivity, good quality, high resistance, anti-lodging, etc. The characteristics and high-yielding cultivation techniques were introduced in the paper, which including planting timely, raising vigor seedlings, transplanting reasonable density, increasing the population quality, suitable cultivation method, scientific fertilization and irrigation, integrated disease control.

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The Influence of Different Fertilization Methods on the Yield and Quality of Diantun 502 2015, 21(6): 114-116.  DOI: 10.3969/j.issn.1006-8082.2015.06.030 Abstract ( )   PDF (345KB) ( )   Test of different fertilization methods on the yield and quality of Diantun 502 was carried out in the main rice producing areas of Huangping county.The results indicated that the treatment 4 （farmyard manure + fertilizer） has the highest yield, the second is the treatment 1 and treatment 5. In terms of the quality, the treatment 1 is the best.

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Regulation of Greenhouse Matrix Seedling Raising Techniques of Machine Transplanting Rice in Taihu Area 2015, 21(6): 117-119.  DOI: 10.3969/j.issn.1006-8082.2015.06.031 Abstract ( )   PDF (403KB) ( )   Greenhouse seedling raising can avoid rain effects on rice seedling plate quality, timely provide seedlings, and ensure the success of machine transplanting. Matrix seedling raising would reduce or avoid the damage to cultivated land, reduce the weight of seedling plate, decrease labor intensity, and contribute to reach the yield potential of machine transplanting rice. This paper introduced the regulation of greenhouse matrix seedling raising techniques of machine transplanting rice in Taihu area, including standards of greenhouse, matrix index, operation process and seedling management.

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Concentrative Commercialization Seedling Raising Techniques for Machine Transplanted Rice by Using River Mud 2015, 21(6): 120-121.  DOI: 10.3969/j.issn.1006-8082.2015.06.032 Abstract ( )   PDF (297KB) ( )   The concentrative seedling raising techniques for machine-transplanted rice by using river mud was summarized. This techniques mainly including four key steps： fine soil preparation, seed selection, precision sowing and intensive management.

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The Causes and Control Measures of Rice Blast in NingDu County 2015, 21(6): 122-123.  DOI: 10.3969/j.issn.1006-8082.2015.06.033 Abstract ( )   PDF (288KB) ( )   Ningdu is a large county of rice cultivation, with serious occurrence of rice blast. This paper explains the reason of serious occurrence of rice blast in the aspects of variety resistance, climatic condition, soil types and cultivation measures, and put forward some concrete countermeasures and methods to control or reduce the occurrence and harm of rice blast.