施用缓释氮肥对夏玉米产量和氮肥利用率的影响  

Effect of Controlled-release Nitrogen Fertilizer on Summer Corn Yield and Nitrogen Use Efficiency

作　　者：李敏[1,2,3] 叶舒娅[1,2] 刘枫[1,2] 袁嫚嫚[1,2] 郭熙盛[1,2] 

机构地区：[1]安徽省农业科学院土壤肥料研究所,安徽合肥230031 [2]安徽养分循环与资源环境省级实验室,安徽合肥230031 [3]安徽农业大学,安徽合肥230036

出　　处：《安徽农业科学》2012年第16期8895-8896,8936,共3页Journal of Anhui Agricultural Sciences

基　　金：施可丰长效稳定肥料产业技术联盟资助

摘　　要：[目的]为夏玉米合理施用氮肥提供理论依据。[方法]以夏玉米为试验材料,通过田间小区试验,研究了缓释氮肥对夏玉米产量和氮肥利用率的影响。[结果]缓释氮肥掺比普通氮肥及缓释氮肥减量施用可以在0.05水平显著提高夏玉米产量和氮肥利用率。缓释氮肥掺混普通氮肥以SCU70%+PU30%处理玉米产量、籽粒吸氮、秸秆吸氮、吸氮总量和氮肥利用率最高,在0.05水平显著高于其他等氮处理,产量为7 284.0 kg/hm2,增幅达10.63%～33.02%,氮肥利用率为33.13%,增幅达7.81%～23.09%。缓释氮肥处理则以SCU70%处理玉米产量、秸秆吸氮、吸氮总量和氮肥利用率最高,在0.05水平显著高于其他缓释氮肥处理,产量为6 937.0 kg/hm2,增幅达6.54%～18.85%,氮肥利用率为37.65%,增幅达11.55%～18.00%。[结论]缓释氮肥配施普通氮肥SCU70%+PU30%及缓释氮肥减量30%施用均能在0.05水平显著提高夏玉米产量和氮肥利用率。[ Objective ] To provide theoretical basis for the reasonable application of nitrogen fertilizer for summer corn. [ Method ] A field plot experiment was conducted to study the impact of slow-release nitrogen fertilizer on the yield and nitrogen use efficiency of summer corn. [ Re- sult ] The combined application of common nitrogen and slow-release nitrogen fertilizer as well as the reduction of slow-release nitrogen fertilizer application increased corn yield and N use efficiency significantly at 0.05 level compared with common fertilizer. The maize yield, N uptake in grains, N uptake in straw, total N uptake and N use efficiency were the highest under the treatment of SCU70% ＋ PU30%. The yield and N use efficiency of SCU70% ＋ PU30% were 7 284.0 kg/hm2 and 33.13% , which were 10.63% -33.02% and 7.81% - 23.09% over the con- trol respectively at 0.05 level. The yield and N use efficiency of SCU70% were 6 937.0 kg/hm2 and 37.65% , which were 6.54% - 18.85% and 11.55% - 18.00% over the control respectively at 0.05 level. [ Conclusion] The combined application of common nitrogen and slow-re- lease nitrogen fertilizer as well as the 30% reduction of slow-release nitrogen fertilizer application had higher yield of maize and N use efficien- cy than others at O. 05 level.

关 键 词：缓释氮肥 夏玉米 产量 氮肥利用率 

分 类 号：S143[农业科学—肥料学] S506.2[农业科学—农业基础科学]