摘要
水体富营养化的发生与农田土壤中磷的淋失有密切的关系。采用模拟降雨试验研究了土壤坡度对地表径流和亚地表径流中磷素浓度的影响。结果表明:在0°—10°范围内,地表径流中总磷、水溶性磷和颗粒态磷浓度和亚地表径流中水溶性磷浓度都随土壤坡度的增加而增加。亚地表径流中总磷和颗粒态磷在坡度为15°时均有一定程度的下降,其下降机理将做下一步分析研究。
There is an important relationship between the occurrence of water eutrophication and phosphorusleaching in farmland soil. The authors studied the effect of soil slope on phosphorus concentration by simulatedrainfall experiments. The results showed that the total phosphorus concentration, water- soluble phosphorusconcentration and particulate phosphorus concentration in surface runoff, and water- soluble phosphorusconcentration in subsurface runoff increased with the increase of soil slope in the range of 0° to 10°. Totalphosphorus and particle phosphorus concentration in subsurface runoff declined to a certain degree when theslope was 15°. The decline mechanism will be analyzed and researched further.
出处
《中国农学通报》
2015年第28期173-178,共6页
Chinese Agricultural Science Bulletin
基金
云南省基金重点项目"滇池磷素表生迁移规律及水生生物响应研究"(2009CC006)
关键词
模拟降雨试验
土壤坡度
磷素浓度
径流
simulated rainfall experiment
soil slope
phosphorus concentration
runoff
