巢湖流域规模化养殖场畜禽粪便污染负荷研究——以居巢区为例

Study on Waste Load of Farmland for the Development of Scale Breeding Farm in Chaohu Basin

以巢湖流域内的安徽省居巢区作为研究区域,结合当地规模化养殖小区的畜禽饲养量、排污量以及有效耕地面积,对畜禽粪便的耕地最大污染负荷量进行了估算,并与当地畜禽粪便的实际负荷量进行比较,对现有养殖规模条件下的环境风险进行了评价。结果表明,2007年该区畜禽养殖全年产生的粪尿合计624 857.37 t;采用耕地畜禽粪便负荷预警值对畜禽养殖污染进行了评价,除夏阁镇、散兵镇和槐林镇以外,该区其他各乡镇街道均已受到畜禽粪便一定程度的污染。应对畜禽粪便污染加以控制,以实现畜牧业的健康发展。

For the purpose of environment protection and reasonable development of scale breeding, Juchao District in Anhui Province, which is situated by the middle of Chaohu Basin, was taken to be studied. The maximmn waste load of farmland was estimated through the breeding numbers and respective excretive coefficients. By comparing the actual load of livestock nkanure with the maxinum admissible load, environmental risk of actual breeding scale in each corrruanity was evaluated. The results showed that there were 624 857.37 tom livestock manure from breeding in 2007. The assessment for breeding pollution was gone with the pre-warning value and the result showed that most communities in the county were polluted on some certain except the towns of Xiage, Sanbing and Huailin. The livestock excreta pollution should be control to realize the health development of animal husbandry industry.