设施条件下灌水量对膜孔灌土壤水氮运移分布影响研究  

Influence of Water Volume on Soil Water and Nitrogen Transport and Distribution Characteristic under Facilities Condition

作　　者：胡浩云[1,2] 程东娟[2] 刘颖[2] 

机构地区：[1]武汉大学,武汉430072 [2]河北工程大学,河北邯郸056021

出　　处：《灌溉排水学报》2012年第4期87-90,共4页Journal of Irrigation and Drainage

基　　金：河北省自然科学基金项目(C2011402042);河北省教育厅自然科学青年基金项目(2011247;2011161);邯郸市科学技术研究与发展计划(0922101023-2)

摘　　要：通过模拟设施条件下不同灌水量灌施硝酸钾肥液试验,分析测定了灌后不同时间的土壤含水率和硝态氮分布。研究表明,不同灌水量的土壤含水率和硝态氮质量分数随着时间延长逐渐减小,以膜孔中心最大,远离膜孔中心逐渐变小;随着灌水量增大,相同位置的土壤含水率变大,而相同位置的土壤硝态氮质量分数变小;增大灌水量对土壤含水率和硝态氮分布的影响有利于植物对水分和硝态氮的吸收。Through the facilities imitating experiment of film hole irrigation with nitric acid potassium solution under different water volumes,the content of soil water and nitric nitrogen was determined and analyzed in the different times after irrigation.The results showed： the contents of soil water and nitric nitrogen under different water volume reduced with time and achieved the maximum at the center while it was reverse away from film hole;soil water content decreased with the increase of water volume at the same position while the nitric nitrogen content was opposite.The influence of the increase of water volume on soil water and nitric nitrogen distribution was good for plant to absorb water and nitric nitrogen.

关 键 词：设施 膜孔灌 灌水量 水氮 运移分布 

分 类 号：S275.3[农业科学—农业水土工程]