| Taking Changling County in south-west Songnen Plain as an example,with the principles of regional agriculture sustainable development,ecological economics,feedback control theory and system dynamics,the article sets up the model of optimal adjustment for agricultural eco-environment system in arid and semi-arid regions.Six adjustment schemes are designed,including present trend maintaining,ecological constructing,water saving,leaning to stockbreeding,leaning to farming,and farming and stockbreeding promoting.The simulating results show that the scheme of farming and stockbreeding promoting is the best adjustment scheme for agricultural eco-environment system in arid and semi-arid regions. |