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《Journal of Anhui Agricultural Sciences》 2006-23
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Distribution of Soil Nutrient and its Environmental Impact under Different Land Utilization in Dounan of Dianchi Watershed

GAO Ming et al(Geography College of Nanjing Normal University,Nanjing,Jiangsu 210097)  
In order to analyze nitrogen,phosphorus and organism in soils under different land-using,5 typical land-using patterns were chosen and 25 soil samples were collected in Dounan of Dianchi watershed.The trends discovered were as follows:there was distinctive difference in nitrogen,phosphorus and organism in soils under different land utilizations.It was characterized with high contents in vegetable and flower lands,having high correlations with fertilization.The next was in waste land after vegetable and flower planting.Wheat land and woodland were rarely fertilized as food supplies and water and soil conservation because of low value.Soil nutrient was decreasing greatly.However,the soil nutrient was abundant in the channel,which was connected with Dianchi,resulting in eutrophication in Dianchi Lake.It may be suggested that wasteland,vegetable and flower land be major Non-point Source Pollutions.In addition,in the paper the theories base for the control of pollution in Dianchi and planning design of land utilization were provided.
【Fund】: 国家自然科学基金重点项目(40473052)
【CateGory Index】: S158
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