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- W2394140121 abstract "Based on field investigation and data analysis on input and output of nitrogen and phosphorous of different farmlands in upper-reaches water resource protection zone of Huangpu River,the balance status of nitrogen and phosphorous of farmlands were studied,by using the evaluation method of nutrient surplus and deficit rate.Results indicated that the real nitrogen surplus and deficit rates of paddy field,dryland and orchard were 31.17%,49.78% and 44.33% respectively,and 30.46%,90.18% and 37.34% respectively higher than permissible nitrogen surplus and deficit rates.Real phosphorous surplus and deficit rates of paddy field,dryland and orchard were 9.57%,44.33% and 53.71% respectively,and-15.51%,53.26% and 33.21% respectively higher than permissible phosphorous surplus and deficit rates.The surplus amounts of nitrogen and phosphorous of dryland greatly exceeded the suitable surplus range,which may cause the pollution risk to water quality in the water resource protection zone." @default.
- W2394140121 created "2016-06-24" @default.
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- W2394140121 date "2011-01-01" @default.
- W2394140121 modified "2023-09-27" @default.
- W2394140121 title "Analysis on Nitrogen and Phosphorous Balances of Farmlands in Upper-reaches Water Resource Protection Zone of Huangpu River" @default.
- W2394140121 hasPublicationYear "2011" @default.
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