灌溉排水学报2012，Vol.31Issue(2)：38-42,5.
施肥量对膜孔灌土壤氮素动态变化影响
Effect of Fertilizer Amount on Dynamic Change Characteristic of Soil Nitrogen under Film Hole Irrigation
摘要
Abstract
Though the different urea amount experiment made under film hole irrigation in the testing-hole,the soil nitric nitrogen amount of maize field under different growth period was determined in order to study the dynamical change of soil nitric nitrogen and evaluate the environment effect of soil nitric nitrogen.The result showed： the nitric nitrogen amount on the profile is little as the distance from film hole center is increase and large as the fertilizer amount increase;there is nitric nitrogen accumulation peak on the profiles being 3 cm and 8 cm away from film hole center under different fertilizer.To increase fertilizer postponed the max nitric nitrogen absorption period.The corn yield and nitric nitrogen accumulation amount is large with fertilizer increasing and there is logarithm function relationship between nitric nitrogen accumulation amount and fertilizer amount;shooting stage and heading stage is the dangerous period of nitrogen leaching because the nitrogen amount is large in the lower soil.The result provided the proof for reasonable fertilizer and evaluating effect of nitrogen on environment.关键词
施肥量/膜孔灌/土壤氮素/动态变化Key words
fertilizer amount/film hole irrigation/soil nitrogen/dynamical change分类
农业科技引用本文复制引用
程东娟,刘颖,高然,费良军,贾丽华..施肥量对膜孔灌土壤氮素动态变化影响[J].灌溉排水学报,2012,31(2):38-42,5.基金项目
水文水资源与水利工程科学国家重点实验室基金项目 （）
河北省自然科学基金项目 （）
国家自然科学基金项目（50579064 （）
50179030） （）
