江苏省案例地区牲畜养殖养分循环与环境效应

运用案例区域调查法和养分物质分析法,对江苏牲畜养殖场饲料、牲畜排泄物、土壤、地表及地下水体养分状况进行了调查、分析对牲畜规模养殖中的养分循环与管理及其环境效应进行了评价.研究表明,牲畜养殖中液体粪水的排放和露天堆放固体粪便的淋失易造成环境问题.地表水体之间的水力联系和地表径流是造成牲畜养殖废弃物环境问题的主要途径.虽然采取固体粪便与液体粪水相分离的方法在一定程度上减少了对环境的影响,但液体粪水仍是污染环境的主要来源.本文还对液体粪水的处理与利用、牲畜排泄物的利用与养分管理提出了建议.

Nutrient cycling and environmental effect of livestock production in case regions of Jiangsu Province.

Based on investigation and analysis of the feed, excreta, soil and waters of surface and underground in the livestock farms in Jiangsu Province with case region survey and nutrient analysis approaches, the nutrient cycling and management and environmental effect in intensive livestock production were assessed. The studies show that the discharge of liquid manure and the run-off loss of solid manure deposited in the open air are the main environment problems in livestock production. The connection among the surface waters and the surface run-off are two main approaches that the wastes in livestock production cause the environment problems. The liquid manure is still a major source of environmental pollution, although the way of separating solid and liquid manure reduces the environmental effect in certain extent. Suggestions on the treatment and use of liquid waste as well as of livestock excreta use and nutrient management were also proposed.