To understand the livestock waste production status of Chongqing and optimize the layout of regional livestock production structure,this study estimated the livestock carrying capacity of farmland in Chongqing and assessed the risk of livestock scales in each district of Chongqing by using relevant statisti-cal data of the planting and breeding industry of Chongqing in 2019.The estimation was based on the prin-ciple of"determining what livestock to raise on the basis of the crops cultivated"and"nitrogen balance".The results indicated that,in total,Chongqing could accommodate up to 87.7442 million livestock and poultry(sheep equivalent),the risk coefficient of livestock and poultry carrying capacity was 0.78.Over-all,there was no problem of overloading of livestock and poultry,and there is still potential for the devel-opment of livestock and poultry industry under the existing farmland scale.Risk assessments indicated that livestock and poultry carrying capacity varied between districts and counties.The areas with high risk,general risk and potential risk in livestock and poultry raising accounted respectively for 2.6％,23.7％and 73.7％.The results suggest that properly planting crops and forages can improve the farmland's capacity in consumption of livestock waste,which can further coordinate the balanced development between crop-planting and livestock industries in different districts of Chongqing,and finally,promote the circular econ-omy model of grassland husbandry which integrates crop-planting and livestock raising.
维普
万方数据