The coverdegree above 30%, the degraded community was resumed to the better degree and the coverdegree below 30%, the degraded community was not resumed;
植被盖度大于30 %以上的退化群落可以得到不同程度的恢复，低于30 %的仅通过封禁难以恢复；
2
Simulations showed that size of cover set obtained by synchronous scheduling algorithm is 76% of asynchronous scheduling algorithm's, and average coverdegree is near to optimization.
In terms of being favorable to soil and water conservation, we confirm the rainfall, vegetation coverdegree , thickness of litter and the amount of soil erosion as monitoring projects.