不同水氮处理对冬小麦生长及土壤水分利用效率的影响  

Effects of Various Water and Nitrogen Managements on Growth of Winter Wheat and Water Use Efficiency

作　　者：王晓凤[1] 吴文良[1] 潘志勇[1] 陈淑峰[1] 刘光栋[1] 夏训峰[2] 

机构地区：[1]中国农业大学资源与环境学院,北京100094 [2]中国环境科学研究院,北京100012

出　　处：《农业环境科学学报》2007年第B10期741-745,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金重点项目"基于农田生态系统碳氮平衡的环境成本评估模型";"十五"国家科技攻关重大专项项目"区域生态农业技术规范与保障体系研究"(2002BA516A)

摘　　要：以山东省桓台县为试验地点，分别在0、100、200、300kg·hm^-2氮水平和喷灌、漫灌两种灌溉方式下，对冬小麦的叶面积指数、地上部生物量、籽粒产量及水分利用效率进行了研究。结果表明，两种灌溉方式对冬小麦的叶面积指数、地上部生物量、籽粒产量影响不显著，冬小麦的水分利用率在1．16—1．34kg·m^-3之间，喷灌处理略高于漫灌处理。随着施氮量由0增加到200kg·hm^-2冬小麦的叶面积指数、地上部生物量、籽粒产量随着施氮量的增加而增加，但是施氮处理（100、200kg·hm^-2）间差异不显著；当施氮量超过200kg·hm^-2时，随着施氮量的增加，冬小麦叶面积指数、地上部生物量、籽粒产量不受施氮量的影响。Winter wheat LAI, shoot biomass, yield and soil water use efficiency were studied in Huantai, Shandong Province, at four doses of nitrogen applications （0,100,200,300 kg·hm^-2） , under both drip and flooding irrigations. The results showed that winter wheat leaf area index （LAI） , shoot hiomass, yield were not obviously affected by the two water managements. Soil water using efficiency was in a range of between 1.16 and 1.34 kg · m^ -3, revealing that in comparison with drip irrigation, the flooding irrigation accelerated soil water using efficiency Winter wheat LAI, shoot hiomass and yield increased with the increase of nitrogen application levels from 0 to 200 kg·hm^-2. But there was no obviously difference between the ni- trogen applied doses with 100 kg·hm^-2 and 200 kg·hm^-2. When the nitrogen dose over 200 kg·hm^-2, winter wheat LAI, shoot hiomass and yield had no response to the increase of nitrogen application.

关 键 词：水氮 冬小麦生长 土壤水分利用效率 

分 类 号：S147.3[农业科学—肥料学]