【作者】 刘明允； 王德亭；

【Author】 ． Liu Mingyun； Wang beting（Tibei College of Agricldtural and Animal Husbondry，850400）． Chinese Journal of Ecology， 1993, 12（3）：73－75. In this paper，four basic principles concerning the conservation of ecological agricuIture in Tibet are put forward and some characteristics and operated agrotechniques of Tibe’s ecological agricuIture are summa－rized．Based on these，agro－ecosystems in Tibet are classified into two groups，i．e. ，temperate－humid forestry－agriculture·animal husbandry combined ecosystem and arid－semiarid cold pasture agriculture －animal husbandry combined ecosystem.

【机构】 西藏农牧学院；