不同肥水条件对水稻生育状况及产量构成因素的影响  

Effects of Fertilizers and Irrigation on Growing Situation and Yield Affecting Factors of Rice

作　　者：郑志广[1] 尹德明[1] 李子芳[1] 程秀文[2] 

机构地区：[1]天津农学院农学系,天津300384 [2]河北省芦台农场实验站,天津301500

出　　处：《天津农学院学报》2003年第2期9-13,共5页Journal of Tianjin Agricultural University

摘　　要：水稻在总施氮肥量相同的情况下,适当减少前期施氮比例,增加中后期施氮比例有利于增产。增产原因主要是无效分蘖减少,中后期水稻群体适中,个体生育健壮,退化颖花数减少,叶片中叶绿素含量提高,功能期延长,最终达到稳穗、增粒、增重的目的。当水稻茎蘖数达到计划穗数的80%时,通过10d左右深水探蘖,成穗率显著提高。Under the equal nitrogen supplies,properly decreasing the proportion of N supplies in the early growing stage and increasing the proportion of N supplies in the middle and late growing stage have benefit to the production increase .The main reasons for it are ineffective tillers decreased,population density in the middle and late growing stage was relatively suitable,the growth of individuals was healthy,the senescence of lower leaves retarded,consequently,the function of the leaves was strengthened,chlorophyll content and nitrogen concentration in leaf increased,thus to avail to accumulate photosynthate.As a result,the number of grains per panicle,percentage of filled grains and the weight of 1 000 grains increased.When the number of tillers reaches 80% of planned,deepwater irrigation can control tilllers effectively and the proportion of effective tillers to total tilers tended to raise.

关 键 词：水稻 氮肥 灌水方式 分蘖 产量 

分 类 号：S511.41[农业科学—作物学]