干旱区/沙区的主要环境问题 ▣重要性：防治风沙灾害，构建北方生态屏障是国家重大需求 全球沙暴四大源区之一 牧民生活健康受到极大损害 20g/m2,11g/m2 80%的沙尘物质来源于贺兰山以西的沙区
牧民生活健康受到极大损害 重要性：防治风沙灾害，构建北方生态屏障是国家重大需求 20g/m2 , 11g/m2 全球沙暴四大源区之一 80%的沙尘物质来源于贺兰山以西的沙区 干旱区/沙区的主要环境问题
植被建设是防治风沙危害，促进沙化草地恢复，构建 风沙区生态屏障的主要措施和有效途径 我国干旱区人工植被建设主要分布区略图 /70E 80 909 100 110 120 130° 人工植被面积600万公顷 45N 北京 戈其沙溪 流动沙正 雅丹 绿洲 植被围定沙面。乌兰布和沙淡 交荒预化发生区 三北防护林范围 兰州 天然林 农山防护林带 防风圆沙林
人工植被面积600万公顷 我国干旱区人工植被建设主要分布区略图 植被建设是防治风沙危害，促进沙化草地恢复，构建 风沙区生态屏障的主要措施和有效途径
二、主要的措施与生态工程建设 2.1 Engineering technology wwx6 Various materials barrier such as stone,stalk were been built for blocking moving sand
2.1 Engineering technology Various materials barrier such as stone, stalk were been built for blocking moving sand 二、主要的措施与生态工程建设
二、主要的措施与生态工程建设 2.2 Biological technology Develop biological carpet control sand technology utilization the soil microbial crust forming principle during the vegetation restoration
Develop biological carpet control sand technology utilization the soil microbial crust forming principle during the vegetation restoration 2.2 Biological technology 二、主要的措施与生态工程建设
二、主要的措施与生态工程建设 2.3 Integrated model/system The shifting sand control system which lays emphasis on sand stabilization in combination biological technology with sand blocking without irrigation
The shifting sand control system which lays emphasis on sand stabilization in combination biological technology with sand blocking without irrigation 2.3 Integrated model/system 二、主要的措施与生态工程建设