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《Southwest China Journal of Agricultural Sciences》 2006-03
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Preliminary analysis of the hybrids with smaller panicle in the system of rice intensification

XU Fu-xian,XONG Hong~*,ZHU Yong-chuan,WANG Gui-xiong(Rice and Sorghum Institute,Sichuan Academy of Agricultural Sciences,Sichuan Luzhou 646000,China)  
Grain yield and yield component traits of 18 rice hybrids were evaluated under the system of rice intensification(SRI) and traditional cultivation(CK).The increasing yield effect of SRI to CK was very significantly and negatively correlated with the grains per panicle of hybrids.The hybrids with smaller panicle had positive yield effect under SRI because the grains per panicle and total number of spikelets increased.The hybrids with bigger panicle under SRI,however,showed negative yield effect due to largely declining in effective panicle and seed set percentage.A suggestible criterion is that the hybrids with grains per panicle less than 170 in CK,may more be suitable to SRI.The relation between soil fertility level and SRI effect was also investigated.
【Key Words】: hybrid mid-season rice type of variety system of rice intensification
【Fund】: 农业部农业结构调整重大技术研究专项(2003-01-01B);; 四川省青年基金(03ZQ026-070);; 四川省水稻攻关后补助;; 泸州市农业科技资助项目
【CateGory Index】: S511.32
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