干旱地区农业研究2017，Vol.35Issue(5)：250-255,6.DOI:10.7606/j.issn.1000-7601.2017.05.37
施氮量对复播青贮玉米光合特性和产量的影响
Effects of nitrogen application rate on photosynthetic characteristics and yield of silage maize
摘要
Abstract
In this study,a field experiment used a tube of two lines (80 + 40) spaced mode,irrigation quota of 288 mm,to study the effects of N application rate (CK～ 14.04 kg·hm-2,F1 ～97.56 kg·hm-2,F2～ 167.16 kg·hm-2,F3 ～ 236.76 kg· hm-2,F4 ～ 306.36 kg· hm-2,F5 ～ 375.96 kg· hm-2) on silage maize and photosynthetic characteristics.At the jointing stage (08.20) and tasseling stage (09.13),photosynthesis characteristic indexes,fertility of the final quality of dry matter,leaf area,the leaf level of water use efficiency,photosynthetic potential and net assimilation rate were calculated.When the N application rate was 236.76 kg· hm-2,silage maize yield was the largest and when photosynthetic active radiation was 1 500 ～ 2 000 μmol· m-2· s-1,N application rate was 236.76 kg· hm-2,silage corn WUE was larger;at spinning tasseling stage,photosynthetic active radiation was 1 500～ 2 000 μmol· m-2· S-1,and N application rate was 236.76 kg·hm-2,the WUE was larger;when N application rate was 236.76～ 306.36 kg·hrn-2,silage maize photosynthetic potential and net assimilation rate achieved the maximum level.When the N application rate was increased,photosynthetic potential and net assimilation rate decreased significantly.Therefore,in Shihezi area,the photosynthetic active radiation of 1 500 ～ 2 000 μmol· m-2· s-1,and N application rate of 236.76 kg· hm-2,are the appropriate level to achieve the maximum silage corn yield and WUE.关键词
施氮量/复播青贮玉米/光合特性/产量Key words
N application/multiple cropping silage maize/photosynthetic characteristics/yield分类
农业科技引用本文复制引用
王久龙,王振华,李文昊,裴磊,赵波,扁青永,朱延凯..施氮量对复播青贮玉米光合特性和产量的影响[J].干旱地区农业研究,2017,35(5):250-255,6.基金项目
国家科技支撑计划项目(2015BAD20B03) （2015BAD20B03）
