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以云南省巧家县发拉村坡度约25°的不同石漠化程度的天然草地为研究区,通过封育、免耕补播、人工种草和种植农作物等措施的防治水土流失量和地表径流量、草地生产力及不同降雨量对土壤的冲刷能力等进行了对比研究。结果表明:与种植一年生牧草或传统农作物相比,免耕补播多年生混播牧草和封育产草量较低,但有更好的截流效应,能显著减少地表径流,有效控制水土流失;降雨对土壤的冲刷能力随着降雨量和降雨强度增大而增大;经封育、免耕补播、人工种草等措施后,草地生产力以人工种草最高,免耕补播次之,封育相对较差,但草地生产力受当地降水量及其分配状况影响,恢复效果存在平、丰、歉年差异。
Taking natural grassland of different rocky desertification degree of about 25 ° in Hela Village, Qiaokou County, Yunnan Province as study area, the amount of soil and water loss and the amount of soil and water loss by means of enclosure, no-tillage replanting, artificial grass planting and planting of crops, Runoff, grassland productivity and the ability of different rainfalls to scour the soil were compared. The results showed that compared with planting annual forage or traditional crops, no-tillage replanted perennial mixed grass and lower yield, but better interception effect, which can significantly reduce surface runoff and effectively control soil erosion; rainfall The scouring ability of soil increased with the increase of rainfall and rainfall intensity. After closed-cultivation, no-tillage and sowing, artificial grass planting and other measures, the grassland productivity was the highest with artificial grass-planting, However, the productivity of grassland is affected by the precipitation and its distribution, and there are some differences in recovery effect between the two years.