Nutrient Losses of Livestock Farms in Jiulong River Watershed
- 海洋环境－已发表论文 
畜牧业的氮磷流失是造成水质污染的重要原因之一.目前国际上多采用养分平衡方法研究畜牧业对环境的影响程度.本文选择福建省九龙江流域的34家生猪养殖系统进行养分(即氮、磷)平衡分析.结果表明:流域范围内,大规模养殖场较中小型养殖场氮、磷流失率低;耕地占有率低的养殖场可以通过出售猪粪,减少氮、磷的流失.饲料是养殖场养分的主要来源,控制饲料的使用量也是减少养分流失的重要途径.同时,针对现状提出减少养分流失的管理措施.Nutrients from livestock production can be a significant source of water pollution. Currently nutrient balance at farm level can be a tool to assessing the influence to environment. The nutrient balance of swine farms in Jiulong River Watershed, Fujian, was analyzed. The results indicated that the nutrient imbalance decreases with size of the farm operation; the operation with limited land resource can get the improved nutrient balance through marketing the manure off-farm to neighboring crop producers. Feed is the main source of nutrient arriving on swine operation, one way to control nutrient losses is to decrease the overloading amount of feed. Meanwhile, some nutrient managements were given in this paper.