不同施氮比例对‘花优14'产量及其构成因素的影响  

Effects of different N fertilization proportions on the yield and yield components of hybrid keng rice 'Huayou 14'

作　　者：冯加根[1] 周燕[1] 龚才根[1] 

机构地区：[1]崇明县农业技术推广中心,上海202150

出　　处：《上海农业学报》2013年第6期154-156,共3页Acta Agriculturae Shanghai

基　　金：上海市崇明县科学技术发展资金项目(CK2011-06)资助

摘　　要：在施氮量300kg/hm^2条件下,研究了氮肥运筹对水稻‘花优14'大田生长及产量的影响。结果表明:前期施氮比例过高,则无效分蘖多,穗型小,产量较低;适当提高后期施氮比例,虽然一定程度上使有效穗数有所减少,但能促进幼穗分化,有利大穗形成,更易获得高产;基蘖肥与穗肥比为6.5:3.5~5.5:4.5时‘花优14'产量最高。Field experiments with hybrid keng rice ‘Huayou 14＇ were carried out under a total of 300 kg/hm2 N fertilizer rate and various N fertilization proportions at different stages.The results showed that when the N fertilization proportion at the early stage was excessively high,the ineffective tiller number increased and the panicle size was small,making the yield reduce.Appropriately increasing the N fertilization proportion at the later stage could promote the panicle differentiation and the large panicle formation and thus make the yield increase though the effective panicle number somewhat decreased.It was most conducive to a high yield that the proportion of basal fertilizer rate and tillering-stage fertilizer rate to heading-stage fertilizer rate was 6.5：3.5-5.5：4.5.

关 键 词：杂交稻 产量 产量构成因素 施肥量 基肥 分蘖肥 穗肥 

分 类 号：S511[农业科学—作物学] S506.2