氮素运筹对免耕移植水稻产量及氮素利用率的影响  

Effects of Nitrogen Application on Yield of No-tillage Transplanted Rice and Nitrogen Utilization Ratio

作　　者：姜新有[1] 周江明[1] 

机构地区：[1]浙江省江山市农技推广中心,浙江江山324100

出　　处：《江西农业学报》2011年第9期104-108,共5页Acta Agriculturae Jiangxi

基　　金：浙江省公益技术应用研究项目(2011C22094)

摘　　要：以水稻品种国稻6号为材料,进行了氮素运筹对免耕移植稻产量及氮素利用率的影响试验。结果表明:免耕条件下,水稻产量与氮水平、氮基蘖肥比重呈单峰曲线关系,通过回归模拟计算出氮用量和基蘖肥氮素比例分别为164.4 kg/hm2和72.2%时水稻产量达最高;基蘖氮肥比例的增加可提高氮肥利用率,本试验条件下,氮肥用量169.8 kg/hm2,基蘖氮肥比例为75.0%时氮肥利用率最高。Taking rice cultivar Guodao No.6 as the tested material,the effects of nitrogen application on the yield of no-tillage transplanted rice and nitrogen utilization ratio were studied.The results indicated that the yield of rice accorded to a single-peak curve with nitrogen level and the rate of basic and tillering fertilizer nitrogen under the condition of no-tillage.Through the regressive simulation,rice could get the highest yield when the application rate of N was 164.4 kg/hm2,and the rate of basic and tillering fertilizer nitrogen was 72.2%.The nitrogen utilization ratio was increased with the increase in the rate of basic and tillering fertilizer nitrogen,and the highest nitrogen utilization ratio was obtained by the combination of N 169.8 kg/hm2 and basic and tillering fertilizer nitrogen rate 75.0%.

关 键 词：氮素 运筹 基蘖肥 免耕稻 产量 氮肥利用率 

分 类 号：S147.2[农业科学—肥料学]