金沙江干热河谷退耕地植被恢复模式初探

以金沙江干热河谷退耕地为研究对象 ,在金沙江一级支流———小江流域进行了植被恢复模式的探讨 ;初步筛选了 10余种适应于干热生境和退化耕地植被恢复的乔、灌、藤、草植物物种 ;对其开展了乔草、灌草、藤草、草草、乔灌草等复层植物群落模式研究。结果表明 :该植被恢复模式的建立 ,对水土保持效益明显 ,试验区的泥沙流失量平均减少 5 7% ,其中以草草及藤草模式的泥沙减少量最大 ,分别达 73%和 5 1% ;同时 ,由于所营建植被为生态经济型植物群落 ,既改善了环境 ,又给当地增加了经济收入 ,促进了小流域生态和社会经济的持续发展

Revegetation Models of Cultivated Land in Jinshajiang Dry and Hot Valley

Experiments were conducted at Xiaojiang watershed to study the revegetation models in Jinshajiang dry and hot valley. More than ten species of tree, shrub and grass adapted to dry and hot habitats were selected out. Different community models, including tree shrub, shrub grass, ratten grass, grass grass, tree shrub grass, were tested and analyzed. The study results implied that the soil and water conservation effect of plant community established was significant, averagely, the soil and water loss of experimental sites decreased by 57%. Two ideal vegetation models, grass grass and ratten grass, had the value of 73% and 51%. The communities constructed had the double function of increasing the income of locals and improving ecological environment, which promoted the sustainable development of the small watershed.