施肥与植被覆盖对坡地铵态氮流失的影响

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	施肥与植被覆盖对坡地铵态氮流失的影响
	梁丽 ; 赵梅
刊名	南方农业学报
	2012
卷号	43 期号:12 页码:1986-1990
关键词	铵态氮 ammonium nitrogen 流失 runoff 氮肥 nitrogen fertilizer 植被覆盖 vegetation coverage 坡地 slope land
其他题名	Effect of fertilization and vegetation coverage on ammonium
中文摘要	明确黄土高原地区施用氮肥及不同植被覆盖对坡地土壤NH4+-N流失的影响。【方法】在人工模拟降雨条件下,利用室内可调节坡度的铁皮冲刷槽,研究降雨径流过程中坡面NH4+-N流失特征,以及坡度、植被覆盖、施用氮素肥料对坡面表层土壤NH4+-N流失的影响。【结果】施用到土壤中的NH4+-N会随径流流失,且主要随着泥沙流失而流失,极少部分NH4+-N入渗到土壤深层;施用NH4NO3会增加土壤自身的NH4+-N流失;植被覆盖减少了坡面土壤自身NH4+-N随泥沙流失的数量,但是加剧了添加氮肥中随径流流失的NH4+-N的数量。【结论】在坡地施用氮肥和种植植被,都会加剧坡地土壤自身中的NH4+-N流失,从而对生态环境产生危害。
英文摘要	This research studied and clarified the influential effects of different nitrogen fertilizers and vegetation coverage on NH4 +- N runoff in slope soil over Loess Plateau. 【Method】Under the conditions of simulated rainfall， experiments were conducted with gradient-adjusted sheet scour tanks to study the NH4 +- N runoff character on slope soil and the impacts of slope gradient， vegetation coverage， and foreigner nitrogen fertilizer on NH4 +- N runoff in slope soil. 【Result】NH4 +- N concentration decreased with surface runoff after NH4 +- N application in soil； the NH4 +- N concentration mainly lessened with sediment losses with only few NH4 +- N infiltration into the soil. Application of NH4NO3 could increase the NH4 +- N loss in soil. Vegetation coverage reduced the NH4 +- N loss with sediment runoff but increased the NH4 +- N loss with added-nitrogen water runoff. 【Conclusion】The application of nitrogen fertilizer or plant vegetation will aggravate the NH4 +- N loss on soil slope， which was harmful to the local ecological environment.
语种	中文
公开日期	2014-09-09
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/5451]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	梁丽,赵梅. 施肥与植被覆盖对坡地铵态氮流失的影响[J]. 南方农业学报,2012,43(12):1986-1990.
APA	梁丽,&赵梅.(2012).施肥与植被覆盖对坡地铵态氮流失的影响.南方农业学报,43(12),1986-1990.
MLA	梁丽,et al."施肥与植被覆盖对坡地铵态氮流失的影响".南方农业学报 43.12(2012):1986-1990.