摘要
为定量研究农田径流中氮磷负荷,通过野外采样和室内分析相结合的方法,研究了赣江尾闾区休耕期农田沟渠径流中氮、磷含量水平及其迁移特征。结果表明,农田沟渠径流中总氮(TN)、总磷(TP)含量均值分别为1.177mg/L、0.044mg/L,与同时期下游河渠水体中氮、磷含量(TN为0.936mg/L,TP为0.032mg/L)相比,农田沟渠径流中氮、磷含量较高,对河渠水体中氮、磷含量水平具有重要贡献;在沿程变化上,其含量虽然有起伏变化,但总的趋势为沿程下降。农田沟渠系统对氮磷均有一定的截留去除效果。
The nitrogen phosphorus concentration levels and migration of farmland ditch runoff in Ganjiang river were investigated based on field sampling and experimental analysis.Results showed that the mean values of total nitrogen（TN） and total phosphorus（TP） were 1.177 mg/L and 0.044 mg/L,respectively.In comparison with rivers（TN=0.936 mg/L,TP=0.032 mg/L）,the nitrogen phosphorus contents of farmland ditch runoff were higher,which could contributes greatly to river nitrogen phosphorus.In spatial distribution of nitrogen phosphorus concentration,the changes of their contents fluctuated,but the general trend was decreasing gradually.The farm ditch system had a good interception and removal efficiency of nitrogen and phosphorus.
出处
《河南农业科学》
CSCD
北大核心
2012年第3期72-74,共3页
Journal of Henan Agricultural Sciences
基金
国家自然科学基金项目(51148006)
江西省科技支撑重点项目(2010BNA09600)
江西省自然科学基金项目(2009GZH0023)
华东交通大学铁路环境振动与噪声教育部工程研究中心资助项目(09TM11)
关键词
赣江尾闾区
农田地表径流
氮磷负荷
迁移特征
Ganjiang river
farmland ditch runoff
nitrogen ＆ phosphorus loading
migration
