Chinese Journal of Rice Science

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Effects of Leaf-cutting and Spikelet-thinning on the Source and Sink of Rice During Grain Filling

Tu Naimei; Zhou Wenxin; Huang Jianliang; Xiao Tieguang; Zou Yingbin   

  • Received:1900-01-01 Revised:1900-01-01 Online:1998-07-15 Published:1998-07-15

水稻灌浆结实期减源疏库对源库关系的影响

屠乃美; 周文新; 黄见良; 肖铁光; 邹应斌   

  1. 湖南农业大学

Abstract: A large-panicle cultivar Chaofengzao and a medium-panicle cultivar Xiangzaoxian 13 were used, by means of leaf-cutting and spikelet-thinning treatments in order to make different sink/source ratio, to study the characters of source-sink interaction, dry matter production and its partitioning, the change trends of activities of source, sink and transport organs. The results indicated that the treatments with higher sink/source ratio and sink capacity had a higher net assimilating rate (NAR), less nonstructural carbohydrate content in stem and leaf, higher transport rate of 14C-assimilate into grains, and higher activities of sink and transport organs.

Key words: assimilate partitioning, physiological index, biochemical index, source-sink relationship, yield components

摘要: 大穗型水稻品种超丰早和中穗型品种湘早籼13,齐穗后进行剪叶疏粒处理创造不同的库源比例,重点考察了源库互作关系,干物质生产和分配,源、库、流活性的动态变化和产量性状等。结果表明,库对源具有反馈促进作用,库/源比高和库容量大的处理净同化率(NAR)较高,茎鞘和叶中非结构碳水化合物滞留量少,14C同化物向籽粒输送比例增加,输导组织和库器官活性趋于增强。

关键词: 源库关系, 同化物分配, 生理生化指标, 产量性状