摘要
为了解肥料中氮素流失特征,设计不同水肥处理,并对不同去向(径流、渗流和渗漏到泥沙)氮素进行了跟踪监测。结果表明:渗流水中肥料氮素含量最高,占总流失量的36.55%～42.86%,泥沙中肥料氮素含量占30.77%～40.00%,随径流水流失的肥料氮素量占23.45%～26.59%;径流、渗流水、泥沙中NO3--N含量与施氮量密切相关,施氮量越高,NO3--N浓度越高;渗流中的肥料氮素含量及NO3--N浓度均高于径流水,表明施用氮肥对地下水环境构成较大威胁。
To understand the characteristics of fertilizer nitrogen（N） leaching under artificial rain- fall conditions,different water-nitrogen treatments were designed to track N. The results showed that the fate of fertilizer N leaching could be divided into three parts： runoff, seepage and sediment brought by seepage,the fertilizer N content in the seepages was the highest, accounting for 36.55M--42.86% of the total fertilizer N leaching,and fertilizer N content in the sediment and the runoffs took up 30.77%--40.00% and 23.45%--26.59% ,respectively. The NO;--N concen- tration in the runoffs, seepages,and sediment was significantly positively related with the N application; the fertilizer N content and NO;--N concentration in the seepages were notably higher than those in the runoffs, suggesting that the fertilizer nitrogen application would threaten the groundwater environment.
出处
《河南农业科学》
CSCD
北大核心
2013年第10期63-65,共3页
Journal of Henan Agricultural Sciences
基金
江苏省新型环保重点实验室开放课题(AE201023)
关键词
氮素流失
肥料
水环境
农田
模拟降雨
nitrogen leaching
fertilizer
water environment
farmland
artificial rainfall
