华北农学报Issue(2)：180-185,6.
玉米不同冠层结构下产量及水氮利用效率分析
Yield,Water and Nitrogen Use Efficiency under Different Canopy Structure
摘要
Abstract
The experiment was employed with main plot of plant density (low,medium,and high respectively), sub-plot of cultivar(CF008,Zhengdan 958,Jinhai 5 respectively),studied the effect of different density on canopy structure,yield,water use efficiency(WUE) and recovery of N fertilizer(RNF).The objective to obtain high yield , high water and N efficiency simultaneously through regulating canopy structure under suitable planting density .The main results showed that the high-yielding canopy structure was obtained under both low and medium densities of the three cultivars.Percent transmission of ear layer leaf was high ,and LAI developmental dynamic were rational , and grain yield and grain number per ear were high because of the even light distribution within canopy under both low and medium densities.Water consumption increased with the increase in density ,but WUE was higher under medium density.Shoot N,N uptake efficiency(NUPE),N use efficiency(NUE),and RNF were significantly higher under low or medium densities for three cultivars .Our results confirmed that proper higher planting density can in-crease grain yield and efficiency of water and N ,and proper planting density of CF008,Zhengdan 958 and Jinhai 5 were below 11.25 ×10 4 ,9.75 ×104 ,8.25 ×104 plants/ha respectively.关键词
夏玉米/密度/产量/水分利用效率(WUE)/氮效率Key words
Summer maize/Density/Grain yield/WUE/Nitrogen efficiency分类
农业科技引用本文复制引用
吕丽华,贾秀领,梁双波,王璞..玉米不同冠层结构下产量及水氮利用效率分析[J].华北农学报,2013,(2):180-185,6.基金项目
农业部公益性行业专项（201203100）；河北省财政项目（2012055002）；河北省科技支撑计划项目 （）
