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杂交水稻氮肥施用技术研究 被引量:1

Research on the Application of Nitrogen Fertilizer in Hybrid Rice
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摘要 通过不同氮肥施用法对杂交水稻群体、穗粒结构及产量的效应分析,表明重前施肥法能获得较多 的有效穗,但每穗粒数较少、粒重软低.适当降低前期用肥量,增加保花肥、粒肥的施用,可提高成穗率,增加千 粒重,从而提高产量. The results of the nitrogen fertilizer (urea) applying research conducted with Shanyou 48-2 in the early cropping season and Xieyou 46 in the late cropping season of 1991 as the materials showed that the conventional applying method with most N fertilizers in the early growth stage (as basic and tillering) might get more productive panicles but fewer spikelets per panicle and lighter grain weight. Properly decreasing the proportion of N fertilizers used at the early growth stage and increasing the proportion of N fertilizers at the late growth stage (as spikelet developing and grain filling) could increase the panicle-bearing tiller rate by 1.44 %-8. 12% ,seed set by 1.61-7. 52 % and 1000-grain weight by 0. 09-0. 81g. Of the treatments, the applying method of N fertilizer with 70% as hasic, 20% as spilkelet developing and 10% as grain filling obtained the highest yield, 7.61-7.81% higher than the control.
出处 《杂交水稻》 CSCD 北大核心 1993年第6期15-18,共4页 Hybrid Rice
关键词 施氮法 杂交稻 穗粒结构 产量 hybrid rice nitrogen application panicle-spikelet structure yield
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