河西走廊绿洲—荒漠过渡带生态恢复治理研究

Study on Ecological Restoration Control of Oasis-Desert Transitional Zone in Hexi Corridor

绿洲—荒漠过渡带不仅影响着绿洲的物质循环和能量流动,同时还影响绿洲的稳定性和沙区群众的生存质量。结合遥感技术,对河西走廊绿洲—荒漠过渡带现状的研究结果显示:绿洲—荒漠过渡带地貌主要以流沙、固定沙地、半固定沙地为主;景观的破碎化程度高,各景观要素内部生境面积小,边缘长度短。采用由封沙育林育草带、植物活体沙障阻沙带、固沙林带和前沿防风阻沙带组成的"四带一体"综合模式治理后,在春季,绿洲—荒漠过渡区过境风速下降;生长季植物多样性增加,盖度提高,土壤含水量的变化不明显,治理区的生态环境得到了改善。

Oasis-desert transitional zone affects not only the material circulation and energy flow of oasis,but also affects stability of oasis of life quality of the masses in sand areas.Combination of remote sensing technology,study was conducted on status of oasis-desert transitional zone in Hexi Corridor,the results showed： landform of oasis-desert tran-sition zone mainly including shifting sand,fixed sandy land,and semi-fixed sandy land;the degree of frag-mentation of the landscape was high,interior habitat size of the landscape elements was small and edge length was short.After adopted the ＂four transitional integration＂ integrated mode including the closure forestation and grass with plants living sand barrier blocking sand belt,sand fixation forest and the frontier wind prevention and sand resistance,the spring,boundary wind speed of oasis-desert transition zone was down;plant diversity in growth season increased,change of water soil content was not significant,and ecological environment of control zone has been improved.