我国羊养殖量及其粪尿资源化利用潜力分析

Analysis of sheep breeding volume and the potential utilization of sheep manure and urine resources in China

为了解我国各地区羊粪尿产量及其资源化利用潜力,本研究依据统计年鉴数据和粪尿产排污系数,估算了2021年我国各省份羊粪尿产生量、羊粪尿肥料化和能源化利用潜力,进一步测算了羊粪尿养分农田耕地负荷。结果表明,2021年全国羊粪尿总产生量达2.91亿t,其中总氮(TN)、总磷(TP)、总钾(TK)含量分别为91.08万、19.28万t和73.89万t,可有效替代氮肥(以尿素计)255.31万t、磷肥(以P_(2)O_(5)计)108.45万t、钾肥(以K_(2)O计)191.82万t,可产沼气165.95亿m^(3),具有较高的肥料化与能源化利用潜力。青海和西藏两省份农田耕地负荷居全国第一和第二,消纳羊粪尿时,应充分考虑耕地、农牧交错带、林地和草地等多种土地类型。

In order to understand the potential utilization of sheep manure and urine,in this study manure and urine production,potential fertilizer and energy utilization of manure and urine and the cropland load of manure and urine in the sheep industry in China in 2021 were estimated.Related data was obtained from the statistical yearbook and the pollutant producing and discharging coefficient.The results show that in 2021,the total sheep manure and urine amount produced in China reached 291 million tons,of which the total nitrogen(TN),total phosphorus(TP)and total potassium(TK)contents have reached 910800,192800 tons and 738900 tons respectively,which can effectively replace 2.5531 million tons of nitrogen fertilizer(calculated by urea),1.0845 million tons of phosphorus fertilizer(calculated by P_(2)O_(5)),and 1.9182 million tons of potassium fertilizer(calculated by K_(2)O),as well as producing 16.595 billion cubic meters of biogas.The potential fertilizer and energy utilization of sheep manure and urine is high.The cropland loads in Qinghai and Tibet rank first and second,respectively,in China.When utilizing sheep manure and urine,full consideration should be given to various land types,such as cultivated land,farming pastoral ecotone,forest land and grassland.