Abstract: Production of animal manure and pollutants therein, such as chemical oxygen demand (COD_Cr), ammonia nitrogen (NH₃-N), total nitrogen (TN) and total phosphorus (TP), were first estimated using the parametric estimating method based on the numbers of various livestock in the Poyang Lake ecological economic zone in the year of 2011, and then load of animal mature on cropland in each county (city or district) was figured out based on the area of cropland in the county, and in the end, animal matnure load tolerance degree of each county was evaluated in light of the alarming value of animal manture load on cropland. Results show that in 2011, the zone turned out a total of 31 294 200 tons of animal manure, which contained 833 400 tons of COD_Cr, 69 700 tons of NH₃-N, 171 900 tons of TN and 57 900 tons of TP, accounting for about 40% of the total of the province. The analysis in light of the alarming value of animal manture load on cropland indicates that in the Poyang Lake ecological economic zone, 9 counties (cities, districts) were still below the level of animal manure load posing a potential threat to the local environment, while the other 26 counties (cities, districts) theoretically were above or at the level, especially, Qingyunpu district of Nanchang and Xunyang district of Jiujiang.

Key words: animal manure, pollutant production, pollution load, alarming value