Analysis of Nitrogen Cycle in Jiangxi Yufeng Beef Cattle Farm

摘要：

　　The Yufeng Beef Cattle Farm, the largest grass-cattle farm in Jiangxi Province, has an area of about 200 ha, including a pasture of 100.67 ha and an orchard of 10 ha, with an annual silage herbage production of 31,700 tons.The herd kept at the farm was around 2200 heads and the number of slaughtered cattle was up to 3000 heads per year.Through the two main models including Manure-Herbage and Manure-Fruit, nitrogen from cattle manure has been fully recycled at the farm.When excluding the external factors such as atmospheric nitrogen deposition, the total nitrogen surplus of the farm was-44,095 kg; the nitrogen surplus of the soil in pasture and orchard was-43,930 kg.The fact that nitrogen surplus was negative indicated a continuous decline of the total amount of soil-surface nitrogen.Thus, the farm needed a certain amount of nitrogen fertilizer input, in order to maintain the nitrogen balance for grass planting.

关键词： Nitrogen cycle nitrogen balance nitrogen surplus cattle manure treatment

作者: Run-hang Li Shi-tang Yang Yu-jie Lou

作者单位: College of Animal Science and Technology, Jilin Agricultural University,Changchun, Jilin Province, C Yufeng Beef Cattle Farm, Gaoan, Jiangxi Province, China

会议类型: 国际会议

会议名称: The 2015 International Symposium on Animal Environment and Welfare(动物环境和福利国际研讨会)

会议地点: 重庆

会议语种:英文

页码: 159-165

在线出版日期: 2015-10-23（万方平台首次上网日期，不代表论文的发表时间）