Analysis on Land Carrying Capacity of Livestock and Poultry Manure in Shanwei City

【Objective】The study was conducted to investigate the status of land carrying capacity of livestock and poultry manure in Shanwei City, and to provide a theoretical basis for the combination of planting and livestock and poultry breeding and the rational development of breeding scales.【Method】According to the data in the Shanwei Statistical Yearbook, the nutrient supply of livestock and poultry manure, the demand of livestock and poultry manure nutrients for crops and the land carrying capacity of Shanwei City from 2017 to 2020 were analyzed.【Result】From 2017 to 2020, the livestock and poultry stocks in Shanwei City increased from 664 100 to 878 900 pig equivalents, and the breeding scales of Haifeng County and Lufeng City in 2020 increased greatly compared with those in the previous three years. The total nitrogen and phosphorus nutrient demand for crops in Shanwei City converted into livestock and poultry manure has increased from 15 200 t and 3 600 t to 17 600 t and 4 100 t, respectively. During this period, the supply of nitrogen and phosphorus in livestock and poultry manure increased from 4 600 t and 800 t to 6 200 t and 1 100 t, respectively. The land carrying capacity indexes of livestock and poultry manure based on nitrogen and phosphorus in Shanwei were 0.30-0.35 and 0.22-0.26, respectively.【Conclusion】The overall scale of livestock and poultry breeding in Shanwei City still has great development potential. The land carrying capacity could be the basis for the agricultural departments to adjust the planning of the development of livestock and poultry breeding.