氮肥运筹对春玉米生长动态与产量及经济效益的影响  

Effects of Nitrogen Application Regime on Growth Dynamics,Yield and Economical Benefit of Spring Maize

作　　者：董智[1] 靖凯[1] 邓林军[1] 董俊[1] 向午燕 侯志研[1] 

机构地区：[1]辽宁省农业科学院耕作栽培研究所,辽宁沈阳110161

出　　处：《辽宁农业科学》2017年第3期15-18,共4页Liaoning Agricultural Sciences

基　　金：国家科技支撑计划项目(2013BAD07B03);水体污染控制与治理专项(2015ZX07103-007)

摘　　要：在辽宁省农业科学院大固本玉米综合试验示范基地,通过田间试验研究氮肥运筹对春玉米的生长、产量及经济效益的影响。结果表明:氮肥施用比例适当后移,有利于叶面积指数的稳定,进而提升玉米的株高及地上部干物质的积累。氮肥追施两次(N_(1:6:3))的产量最高,较一次性施氮的产量提高16.9%,经济效益达14 146元/hm^2,增收17.4%,产投比提高0.1%。随着玉米专用缓释肥的发展、玉米价格的波动及劳动成本的上升,玉米一次性施肥还有很大的发展空间。A spring maize field experiment was carried out in Fu xin of Liaonmg province efects nitrogen application regime on growth dynamics, yield and economical benefit. The results show that rea-sonable postponing nitrogen application increased plant height and dr matter accumulation, with better leaf ar-ea index. The treatment of nitrogen topdressing twice which the nitrogen ratio is 1 tduction , economical benefit was 14 146 yuan/hm2, which the average yield increase was 16. 9 % , the incomeincrease was 17.4% and the input-output ratio increase was 0. 1% compared to nitrogen single fertilize. The way of single fertilization will be used more and more with the using of slow-release fertilizer, lower corn price and higher labour cost.

关 键 词：玉米 产量 氮肥运筹 经济效益 

分 类 号：S513.01[农业科学—作物学] S143.1