摘要
在定位试验基础上,应用HYDRUS-1D模型对黄淮海平原典型土壤(黄潮土)中土壤水渗漏及硝态氮淋失动态进行了模拟分析。结果表明:在传统水氮管理模式下,黄潮土2m土体深处的土壤水渗漏和硝态氮淋失非常严重,2个轮作期内,土壤水渗漏总量占地表总入水量的23.7%,硝态氮淋失总量占总输入N量的15.9%,冬小麦生长季的硝态氮淋失量大于夏玉米生长季;改良灌溉和改良施肥模式下产生的硝态氮淋失量比传统灌溉和传统施肥模式减少74.7%,节约灌溉水211.5mm、节省施N423.5kg·hm-2。
Based on a stationary experiment,soil water leaching deep drainage and nitrate-N loss with leachate in a soil(yellow fluvo-aquic soil)representative of the Huang-Huai-Hai Plain were simulated with the HYDRUS-1D model.The results showed that under conventional water and nitrogen management,percolation of soil water and nitrate leaching were very serious in the soil,causing a loss of about 23.7% of the total amount of irrigation and precipitation,and about 15.9% of the total N applied during two successive rotations;the amount of nitrate leaching in the season of winter wheat was higher than in the season of summer maize;and the modified irrigation and fertilization management pattern reduces the nitrate-N loss by 74.7% as was compared with the conventional one,thus saving 211.5 mm of irrigation water and N 423.5 kg·hm^(-2).
出处
《农村生态环境》
CSSCI
CSCD
北大核心
2004年第2期28-32,共5页
Rural Eco-Environment
基金
973"国家重点基础研究发展规划项目(G1999011803)
"863"国家高技术研究发展计划课题(2003AA209010)
