密肥条件对水稻产量及种植效益的影响  

Effects of Nitrogen and Planting Density on Yield and Planting Effect of Rice

作　　者：刘建[1] 徐少安[1] 

机构地区：[1]江苏沿江地区农业科学研究所,江苏如皋226541

出　　处：《湖北农学院学报》2004年第1期1-5,共5页Journal of Hubei Agricultural College

基　　金：江苏省"十五"重点科技资助项目(BE2001329)

摘　　要：以优质迟熟中粳稻"通育粳1号"为材料,研究了不同施N量和栽插密度对水稻产量和种植效益的影响。结果表明,大田施N量(0～450)kg/hm2范围内,产量随施N量的增加而增加,但增幅递减,当1hm2施N量≤337.5kg时,基本苗为13.5×106的处理产量最高,施氮量增至450kg时,降低基本苗则利于增产。生产收益在施N量(225～337.5)kg/hm2最高,当施N量225kg/hm2时,以基本苗9×106/hm2收益最大,施N量337.5kg/hm2时,以基本苗4.5×106/hm2收益最大。投N效益随施N量增加而相应降低。The effects of planting density and N application amount on yield and planting effect of rice were studied with high quality and mid-season rice variety Tonggeng 1. The results were as follows: N application in (0～450) kg/hm^(2),the rice yield were increased with the increase of N application , but the increase rate descent. The rice yield were the most high while the N application lower than 337.5 kg/hm^(2) and the 13.5×10^(6)/hm^(2) of the planting density , and the N application at 450 kg/hm^(2) the rice yield were raised with the decrement of planting density. The planting effect were most high while the N application in (225～337.5) kg/hm^(2), the income were the biggest as N application at 450 kg/hm^(2) and the 9×10^(6)/hm^(2) of the planting density , or as N application at 337.5 kg/hm^(2) and the 4.5×10^(6)/hm^(2) of the planting density. The fertilizers effect were decreased with the increase of N application.

关 键 词：水稻 产量 栽插密度 氮肥 种植效益 密肥条件 

分 类 号：S511[农业科学—作物学]