6ARTHUR W SAMPSON. Range and Pasture Manage- ment[M]. New York:John Wiley Sons,1923:328.
7苏大学.天然草地合理载畜量的计算[S].北京:中国标准出版社,2003:2～8.
8Jagtap S, A missah Arthur A. Stratification and synthesis of crop livestock production system using GIS[J]. I999, 47,573-582.
9Millar J, Connell J. Strategies for scaling out impacts from agricultural systems change: the case of forages and livestock production in Laos, A gric Hum Values [J]. 2010,27:213-225.
10Bell R H V. Carrying capacity and off take quotas[C]// Conservation and Wildlife Management in Africa. Wash- ington: US Peace Corps, 1985,74- 101.
