河西走廊50a治沙措施应用中出现的问题及未来思路  

Problem and Future Thinking on Utilization of Desert Control Method During 50 Years in Hexi Corridor

作　　者：常兆丰[1] 刘虎俊[1] 

机构地区：[1]甘肃省治沙研究所,甘肃武威733000

出　　处：《中国沙漠》2001年第z1期87-91,共5页Journal of Desert Research

基　　金：国家"九五"林业科技攻关项目 (960 170 10 10 3 )子专题"河西走廊荒漠化土地治理技术研究与示范"资助

摘　　要：河西走廊的防沙治沙在我国西北沙区具有一定的代表性。 5 0a的防沙治沙也是对所采用治沙措施的检验。 5 0a来河西走廊沙区采用的治沙措施主要有植物治沙、机械沙障固沙、封沙育草、机械沙障与栽植灌木相结合以及营造沙区护田林网等。治沙措施的应用在实践中表现出来的问题主要是 :①植物治沙的适用范围不清 ,提取地下水造林成为生态环境继续恶化的因素之一 ;②造林密度过大 ,导致人工固沙植被大面积衰败死亡 ;③机械沙障的应用受到限制 ;④封沙育草的预期结果不明 ,实际应用存在盲目性 ;⑤措施的选用和措施之间的搭配凭借主观经验 ,其功能得不到充分发挥 ;⑥打井开荒大量提取地下水 ,是治沙进一步生态环境退两步的最主要因素。解决上述问题的根本出路是综合治沙。综合治沙是防沙治沙的唯一正确之路 ,是今后治沙科技进步的突破口。Desert control of Hexi corridor has representative significance in desert areas of northwest China. It has also checked the effectiveness of the utilization of desert control methods in 50 years. The main desert control methods in Hexi corridor include sand-fixation with plants, with mechanical sand barrier or its combination with plant, and closing as well as the establishment of wind breaking belt of farmland. The main problems of desert control in practice are follows: (1) It is not clear about the suitable extent for desert control with plants. (2) The dense of afforestation is large, which lead to the artificial plants degrading and even dying in large scale. (3) The utilization of sand barrier is limited. (4) The predicting result of closing and raising herbs is not clear, and there is a blindness to utilize it in practice. (5) The choosing and combination of methods was carried out by subjective experience totally, thus their function can't be well brought into play. (6) The extensively pumping of groundwater for reclaimation is the main reason of eco\|environment degradation. The key way of solving the above\|mentioned problems is that desert control should be carried out comprehensively. It is the only correct way to control desert, and a breach of scientific progress in sand control.

关 键 词：治沙措施 问题 思路 综合治沙 河西走廊 

分 类 号：S288[农业科学—农业水土工程]