元谋干热河谷区旱坡地生态农业模式的水土保持效益研究

Study on Soil and Water Conservation Benefit of Models of Eco-agriculture on Dry Slope Land in Yuanmou Dry Hot Valley

对元谋干热河谷区4种旱坡地生态农业模式的水土保持效益进行了系统的研究。结果表明:与对照模式“罗望子+裸地”相比,建立的4种模式均体现了良好的水土保持效果,其中,“罗望子+木豆+柱花草”模式截持降雨,增加地表盖度,改善土壤物理性状,提高蓄水保水能力,防治水土流失效果最佳,其余3种模式均有明显的生态效益。根据需要,若重新对套入模式的主栽灌草层作物进行科学合理的搭配,重建后的优化复合生态农业模式,无论是生态效益,还是经济和社会效益都将得到充分的体现。

The paper systematically studied the benefits of soil and water conservation on 4 different models of compound eco-agricuhure on dry slope land. The results showed that their effects of soil and water conservation were better than the compare model which was Tamarindus indica ＋ bare ground. Among them, the model, Tamarindus indica ＋ pigeonpea ＋ Stylosanthes gracills, had the best effects on intercepting rain, increasing cover degree of the earth＇s surface, improving soil physical characteristics, increasing the performance of impoundment and controlling water retention and soil erosion. Other 3 models had the obvious ecological benefits. If the plants which was some different shrub and grass are disposed reasonably again, the optional compound eco-agriculture models by rebuild will produce good ecological ,economic and social benefit.