不同灌溉畦长对麦田灌水均匀度与土壤硝态氮分布的影响  

Effect of different border lengths on the irrigation homogeneity and soil nitrate-N distribution on wheat field

作　　者：崔振岭[1] 陈新平[1] 张福锁[1] 石立委[2] 李俊良[2] 

机构地区：[1]中国农业大学资源与环境学院,北京100094 [2]莱阳农学院农学系,莱阳265200

出　　处：《中国生态农业学报》2006年第3期82-85,共4页Chinese Journal of Eco-Agriculture

基　　金："十五"国家攻关重大专项(2002BA516A02);国家自然科学基金重大项目(30390084);农业部948重大国际合作项目(2003-Z53)资助

摘　　要：试验研究不同灌溉畦长对灌水量、灌水均匀度与土壤NO3--N分布的影响。结果表明,在农民习惯灌水条件下,短畦处理(90m)灌水量为102mm,而长畦处理(180m)灌水量为132mm,且灌水明显增加了长畦处理田块水分、养分的空间变异。长畦处理比短畦处理多损失44mm灌溉水,N素损失增加20kg/hm2。在农民习惯的大肥大水条件下,由灌溉畦长引起的水肥田块空间变异未对冬小麦产量造成明显影响。但缩短畦长是推广应用节水节肥优化生产体系的首要措施。The effect of different border lengths on the irrigation quantity, irrigation homogeneity and soil nitrate-N distribution was studied. The results show that the irrigation amounts in the longer border （180m） and shorter border （90m） are 132mm and 102mm, respectively. And the spatial variabilities of water and N are enlarged by irrigation in the longer border. Compared to the shorter border, 44mm irrigation water and 20kg/hm^2 N are lost in the longer border. Under conventional irrigation and N fertilization management condition, the spatial variabilities in the water and N do not affect the winter wheat grain yield because of excessive water and N input. Shortening the length of border is the first-line measure if popularizing the optimized production system with N fertilizer and water.

关 键 词：畦长 灌水均匀度 NO3^- -N分布 

分 类 号：S275.3[农业科学—农业水土工程] S572[农业科学—农业工程]