Four components contribute to rice grain yield including the panicles per unit area, the number of spikelets, the percentage of, and the weight of ripe grains.
四个水稻籽粒产量构成因素为单位面积穗数、小穗数、成熟籽粒百分数和成熟籽粒重量。
The effects of nitrogen fertilization levels on rice grain yield and quality were studied under different irrigation methods by using japonica rice cultivar 9325 as material.
以常规粳稻品种9325为材料，研究了大田条件下不同灌溉方式和氮素水平对水稻氮素利用及稻米产量和品质的影响。
Growing azolla has less effect on increasing the grain yield in present cropping season, however, azolla incorporated as manure the rice grain yield of present season increased by 5%.
养萍对当季水稻产量增加效果不大，而养萍后翻压对当季水稻产量可提高近5%。
Results showed that there were significantly genotypic variations in rice grain yield, K utilization efficiency and shoot K accumulation at different growth stage under two different K supply.
研究结果表明，两种供钾水平下，水稻的稻谷产量、钾利用效率和各生育期地上部钾积累都存在显著的基因型差异。
First, rice farmers through participation in grain cooperatives can achieve scale rice production, reducing input costs, increasing rice yield.
第一，水稻农户通过参与粮食专业合作社可以实现水稻生产的规模效应，减少成本投入，增加水稻收益。
The correlation and path action among economic characters to grain yield for 11 mainly promoted hybrid rice in Guangdong were analyzed .
本文研究了11个广东省主推杂交水稻组合主要经济性状间的相互关系及其对产量的通径作用。
Many rice varieties with high yield potential — including 'super-rice', usually with big panicles [large number of grains] — often suffer from bad grain filling.
许多拥有高产潜力的水稻，包括通常具有更大的圆锥花序[更大数量的谷粒]的超级稻，都经常灌浆不良。
The UN FAO has decided to get involved in the work of spreading the coverage of Yuan's high-yield hybrid rice, which it considers the best way to increase the world's grain output.
联合国粮农组织决定参与扩大袁隆平的高产量杂交水稻种植面积的工作，该组织认为这是提高世界粮食产量的最佳途径。
The grain weight is a effective component in the improvement of rice yield.
增加水稻粒重是提高粮食产量的有效途径。
For a given rice variety, the crop harvest index, which is calculated by the grain yield divided by total dry matter produced above ground, may vary with crop management practices used.
对于给定的水稻品种，作物收获指数(由籽粒产量除以地上部分总干物重求得)可能随作物管理措施不同而变化。
Increasing yield level per unit area is forever theme for rice breeding aim, and advancing photosynthesis efficiency is one of key factors for improving grain yield.
提高单位面积的产量是水稻育种目标永恒的主题，提高光合作用效率又是提高产量的关键因素。
Crossing it with Zaohui 89, a new two-line early hybrid rice combination, Jinliangyou 289, was developed and it was characterized with both high yield and good grain quality.
利用该不育系与早恢89配组育成两系杂交早稻新组合金两优289，该组合具有产量高、米质较优、综合性状好等特点。
The grains and grain weight decreased and the blasted rate and yield loss rate of rice increased with the increase of disease grains each ear.
水稻稻曲病随着每穗稻曲球数增加，穗粒数、粒重及千粒重下降，秕谷率上升，产量损失率增加。
Inoculation tests showed that Hirschmanniella oryzae could cause yield losses of rice, especially reduced the number of panicles and grain weight.
接种试验证实潜根线虫侵染水稻能引起减产，主要是减少有效穗和千粒重；
The effect of applying N-fertilizer or not in wheat on soil fertility and grain yield and fertilizer-N use efficiency (FNUE) of rice in the wheat-rice cropping system were studied.
通过对前茬作物小麦设置施用氮肥与不施用氮肥处理研究它对土壤肥力及后茬作物水稻产量和氮肥利用率的影响。
The yield components and grain filling characters of northern large panicle type super japonica hybrid rice Liaoyou 3072 were studied.
对北方大穗型超级杂交粳稻辽优3072进行了产量结构和灌浆特性的研究。
Therefore, genetic analysis of grain shape is of great significance for increase of rice yield.
因此，阐明水稻粒形遗传控制的机理，对提高水稻产量具有十分重要的意义。
The effect of plant density on grain yield was also not significant for rice variety tested, the optimum plant density was about300,000 to375,000 hills per ha .
供试水稻品种的植株密度对籽粒产量的影响也未达到显著水平，最佳植株密度为每公顷300，000~75，000篼。
The experience in exploiting and utilizing new hybrid rice combinations with high yield and good grain quality to strengthen the marketing competitiveness was introduced.
就种子公司如何通过不断开发和利用杂交水稻优质高产新组合，增强市场竞争力的经验作了介绍。
Rice blast and stem borers have done harm to rice production, led to decreased rice yield and inferior grain quality.
稻瘟病和螟虫等病虫害严重危害着水稻生产，导致水稻产量下降，稻米品质变劣。
Grain yield of rice plants had a reducing trend with increasing concentrations of Zn and cr.
水稻籽粒产量随锌、铬浓度的增加呈降低的趋势。
Many rice varieties with high yield potential - including 'super-rice', usually with big panicles [large number of grains] - often suffer from bad grain filling.
许多具有高产潜力的水稻品种——包括通常有着大型圆锥花序的‘超级水稻’——往往受限于灌浆不良。
China accounts for 35% of global rice production and 2/5 of total domestic grain production. About 55% of rice yield is consumed directly as cooked rice. Only 6% is used for processing in China.
我国稻米总产量占世界总产的35％，占粮食总产量的2／5左右，约55％的大米作为口粮直接消费，加工用米仅占总产的6％。
The optimal two-factor saturated D design was conducted to investigate effects of the active organic fertilizer made of grain stillage and other additives on rice yield.
采用二因素饱和D最优设计方法，对酒丢槽制作活性有机肥（以下简称活性有机肥）在水稻上进行了不同基肥和追肥施用量试验。
Since 1987, late rice is planted in extensive area. The meteorological factors influencing the variation of grain yield per unit area from 1987 on differ obviously with those before 1987.
1987年大面积种植单季晚稻以来，影响粮食单位面积产量变化的气象条件与1987年之前有着明显的差异。
Under the field experiment conditions, effects of site-specific nitrogen management(SSNM)on grain yield and grain quality of rice were studied.
在大田试验条件下，观察了实地氮肥管理对水稻产量和稻米品质的影响。
Under the field experiment conditions, effects of site-specific nitrogen management(SSNM)on grain yield and grain quality of rice were studied.
在大田试验条件下，观察了实地氮肥管理对水稻产量和稻米品质的影响。
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