Case Studies on High Yields of Paddy Rice in Jiangsu Province, China : I. Characteristics of grain production

[摘要] Analysis of the characteristics of grain production of 965 gm-2 obtained by Shan You 63 (F1 hybrid rice) in 1991 was carried out Absorption of nitrogen reached 21 gm-2 up to the time of heading, and a large capacity of grain yield (50, 360 spikelets per m2) was obtained. Efficiency of increase in spikelet number per m2 by absorbed nitrogen up to heading was essentially the same as in west Japan. Mean Leaf Area Index 10 days before heading became exceptionally large (10.18). A large amount of translocation of accumulated assimilation products before heading improved the percentage of ripened grain. Increase in translocation of assimilated products stored in the culm and leaf before heading may remarkably increase yield in China.

[学科分类] 农业科学（综合）

[关键词] China;移行量;Grain production;子実生産;High yield;水稲;Paddy rice;汕優63号;Shan You 63;多収穫;Translocation.;中国.