Research on the Land Carrying Capacity of Livestock and Poultry Manure Based on Nitrogen-Phosphorus Nutrient Balance——A case study of FK County
In order to scientifically adjust the scale and layout of plantation and aquaculture in the region,and to promote the cyclic development of the combination of plantation and aquaculture,this paper based on the nitrogen-phosphorus nutrient balance method,takes the"Technical Guidelines for Measuring Land Carrying Capacity of Livestock and Poultry Manure"as the calculation basis to measure the average land carrying capacity of livestock and poultry manure in 2020～2023 in FK County and its townships,and to evaluate the early warning of environ-mental pollution.The results show that:the land carrying capacity of FK County based on nitrogen nutrients is 2 880 329 pig equivalents,phosphorus nutrients is 2 015 232 pig equivalents,and the current scale of aquaculture is 1 322 075 pig equivalents,so the amount of livestock and poultry farming in FK County has not yet been over-loaded,but from the viewpoint of townships,Township D is in an overloaded state;the environmental pollution early warning level of FK County based on nitrogen and phosphorus nutrients is all Class I,and there is no pollu-tion risk.However,from the viewpoint of each township,the risk warning level of D is Class Ⅲ or Ⅳ respective-ly,and the pollution is more serious.Township B、E、N、Rand S are all of Class Ⅱ risk and slightly polluted.
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