辽西北土壤沙化的治理对策和措施

The Countermeasures for Soil Sandification in Northwestern Liaoning

辽西北土壤沙化发展的主要原因是［１］：在脆弱的农牧交错区生态环境中，人类过度的经济活动与落后的主产技术的相结合，造成对环境资源的压力过大，导致农业生态系统结构不合理，系统内部平衡失调，直至耕地、草场退化、沙化．其对策是：把它作为一个复杂的农业生态经济技术系统，应用系统分析的方法，治本与治标相结合，以治本为主的原则，通过对农业生态系统结构的全面调整，变社会经济系统与环境资源系统不协调为协调，使经济再生产与自然再生产相适应，从而达到根源性治理土壤沙化的目的。

The main reasons for the worsening soil sandification are the over economic activities and the irratio -nal cultivation in the interdistributing areas for agricultural and graziery practices in Northwestem Liaoning, which led to the environment resources being under the high pressure. The fundamental approaches should be: to change the social - ecological- economic complex system from disaccord to coordinatg: to make the economic reproduction adapting to the natural reproduction, and to readjust the agro-eco-system structure.