Nutrient Lossed in Soils on Loess Plateau

编号 zgly0000125817

文献类型 期刊论文

文献题名 Nutrient Lossed in Soils on Loess Plateau

学科分类 220.1040;森林土壤学

作者 PENGLIN  WANGJI－ZENG 

作者单位 NorthwesternInstituteofSoilandWaterConservation 

母体文献 PEDOSPHERE（土壤圈：英文版） 

年卷期 1995,5(1)

页码 83-92

年份 1995 

分类号 S157.1 

关键词 黄土高原  土壤养分流失  径流  沉积物  产量  水土流失 

文摘内容 The soil nutrient losses due to excessive soil loss on Loess Plateau were studied by means of runoff plots and systematical determination of soil nutrients both in sediments and runoff.The results show that the amounts of nutrient losses depended on the amounts of ersoion sediments.Along with sediment,11-197kg nitrogen/hectare and 9-174kg phosphorus/hectare were lost,accounting for 92.46-99.47 percent of the total amount of nitrogen loss and 99.85-99.99 percent of the total amount of phosphorus loss respectively.The nutrient losses,very small in runoff,were mainly attributed to erosion of a few rainstorms during a year.The nutrient level in sediment was mostly higher than that in the original soil.Planting grass evidently redued the losses of soil nutrients.The N level was lower in runoff than in rainfall so that the N loss from runoff could be made up by rainfall.Fertilizer application to crops raised the nutrient level in runoff。