墨西哥 6 0 %以上的水土资源处于严重退化状态 ,为探求墨西哥中部陡坡上的农用土地的最佳管理措施 ,进行农地生产力恢复的研究。在坡度为 8%的坡地上实行作物残茬覆盖和采用免耕与传统耕作方式相比 ,可减少土壤流失 80 % ,径流 76 %。降雨模拟试验表明 ,采用免耕水分入渗能力几乎增加了 30 % ,水分入渗能力和深水渗透的增强表明当地湖泊水文特征和耕作区土壤湿度有明显改善。利用水文基本模拟和卫星图像以及地理信息系统 ,将试验点数据向全流域推广应用。这项工程为发展墨西哥的土壤保护计划和制定一个全国性的保护耕作规划提供了决策依据 More than 60% of Mexico’s land and water resources are in a state of serious degradation, and research on the restoration of farm productivity has been conducted to explore best management practices for agricultural land on steep slopes in central Mexico. Compared with the traditional tillage method, no-tillage can reduce the soil loss by 80% and the runoff by 76% on the slope of 8%. Rainfall simulation tests showed that the no-till water infiltration capacity increased by almost 30%. The increase of water infiltration capacity and deep water infiltration showed that the hydrological characteristics of the local lakes and the soil moisture in the tillage areas improved obviously. The use of basic hydrological simulation and satellite imagery and geographic information system, the pilot point data to promote the application of the whole basin. This project provides the basis for decision-making on the development of a soil conservation program in Mexico and the development of a national program of conservation farming