基于种养结合的大通县畜禽粪污土地承载力研究OA

By evaluating the distribution of the scale of livestock and poultry breeding and the land carrying capacity in each township of Datong county,Qinghai province,this study aims to provide theoretical references for optimizing the regional breed-ing distribution structure and promoting sustainable integrated farming and animal husbandry.The nutrient balance method was used to calculate and analyze the land carrying capacity of livestock and poultry manure,the carrying capacity per unit of agricul-tural land,and the balance between planting and breeding in each township of Datong county.The results showed that the land carrying capacity calculated based on nitrogen nutrient in Datong county in 2023 was 913 800 pig equivalents,and the carrying capacity of livestock and poultry farming land per unit of agricultural land was 20.14 pig equivalents per hectare and the land bearing capacity index was 1.07.Compared with the actual total livestock and poultry breeding capacity of 976 900 pig equivalents and the unit agricultural land carrying capacity of 21.53 heads per hectare in Datong county.The actual breeding quantity has exceeded the theoretical maximum.The land carrying capacity index of livestock and poultry manure in Shishan township,Jile township,Duolin town,Xiegou town-ship,Qinglin township,and Baoku township was all greater than 1.Combined with the GIS spatial analysis map,it was found that the above towns and townships were overloaded.Therefore,it is necessary to optimize breeding and livestock breeding within the county,strengthen the ability to treat livestock and poultry manure,adjust the scale of livestock and poultry breeding,implement collaborative management between townships,optimize the structure of breeding and livestock breeding,and promote the combination of planting and breeding.