Inventory of apparent nitrogen and phosphorus balance and risk of potential pollution in typical sloping cropland of purple soil in China—A case study in the Three Gorges Reservoir region

Ecological Engineering(2017)

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摘要
•Phosphorus balance is put in previous model and used to calculate nutrients balance.•Recycling nitrogen and phosphorus is concerned as the source of nutrients balance.•Input of nitrogen and phosphorus by parent-rock weathering are taken into account.
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关键词
Purple soil,Sloping cropland,Nutrient balance (N and P balance),Three Gorges Reservoir region
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