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利用统计资料和文献数据,结合国内外研究,估算了重庆市巫溪县畜禽粪尿产生量及其排出的氮磷养分、生化需氧量(BOD5)、化学需氧量(CODCr)、氨态氮(NH3-N)总量和单位耕地污染物承载量。结果表明:2006年巫溪县畜禽粪尿BOD5、CODCr、NH3-N排出总量分别为2.55万t、2.76万t、0.24万t;畜禽粪尿耕地承载量为42.97t/hm2、单位耕地粪尿N承载量为179.28kg/hm2、单位耕地粪尿P承载量为57.34kg/hm2。全县耕地畜禽粪尿承载量在空间上分布极不平衡,承载量大的主要分布在徐家镇、花台乡、城厢镇等地。
Using the statistical data and the literature data, combined with the research at home and abroad, the livestock manure excrement production and the N, P, BOD5, CODCr, ammonia Total nitrogen (NH3-N) and pollutant loading per unit of arable land. The results showed that the total amount of BOD5, CODCr and NH3-N excreted in livestock and poultry in Wuxi in 2006 was 25,500 tons, 27,600 tons and 24,000 tons, respectively. The carrying capacity of animal manure and urine was 42.97 t / hm2, The N carrying capacity of arable land was 179.28kg / hm2, and the P carrying capacity of arable land was 57.34kg / hm2. County farmland livestock and poultry excrement carrying capacity in the spatial distribution of very uneven, the main bearing large load in the town of Xu, Huapai Township, Chengxiang and other places.