3Boyazoglu J. Livestock fanning as a factor of environmental, social and economic stability with special reference to research[J]. Livestock Production Science, 1998, 57:1-14.
4Miller G T. Living in the environment: an introduction to environmental science. 7th Edition[M]. Belmont: Wadsworth Publishing Company, 1992.
5Ongley E D. Control of water pollution from agriculture[R]. Rome: Food and Agriculture Organization of the United Nations, 1996.
6Kronvang B. Diffuse nutrient losses in denmark[J]. WaterScience and Technology 1996, 33(4/5): 81-88.
7Atsushi I, Kiyoshi Y. Study on characteristics of pollutant runoff into Lake Biwa[J]. Japan. Water Science and Technology, 1999, 39(12): 17-25.
8Boers P C M. Nutrient emission from agriculture in the Netherlands: Causes and remedies[J]. Water Science and Technology, 1996, 33(4/5): 183-189.
9Kuipers A, Mandersloot F, Zom R L G. An approach to nutrient management on dairy farms[J]. Journal of Animal Science, 1999, 77(Suppl.2): 84-89.
10Mallin M A, Cahoon L B. Industrialized animal reductio major source of nutrient and microbial pollution to aquI ecosystems[J]. Population and Environment, 2003, 240 369-385.