当前位置:首页 > 农业/林业 > 农业基础科学 > 中国干旱地区土地退化防治最佳实践(英文版)
作者:中国-全球干旱区土地退化评估项目,全球环境基金干旱生态系统土地退化防治伙伴关系 编出版社:中国林业出版社出版时间:2008年11月
- 版 次:1
- 页 数:
- 字 数:
- 印刷时间:2008年11月01日
- 开 本:大16开
- 纸 张:胶版纸
- 包 装:平装
- 是否套装:否
- 国际标准书号ISBN:9787503853401
High vertical living barrier is a protective barrier set in the wind and sand strickenareas. The barrier with certain height and penetrability is made up of growing plantssuitable for dry and sandy conditions to alleviate the wind and sand drifting speedthrough the rows of plants, and finally piling up the drifting sand. It is an effectivesand fixation approach to protect infrastructure from being ravaged.Vast deserts are distributed in north China where soil is seriously desertified. The rail-way service has experienced frequent suspensions in Qingshui section of Lanzhou-Xinjiang railway line suffering immense economic losses. In 1980s, the railway de-partment raised funds to construct high vertical living barrier with technical supportprovided by Gansu Desert Control Research Institute. Since its operation, the projecthas played an important role in intercepting sand encroachment and protection of nor-mal operation of railway service.The high vertical living barrier is set in a strip formation in the areas where wind anddesert hazard is severe. 2-4 belts of windbreak are proper for the seriously affectedareas and 1-2 belts are suitable for lightly affected places. Specifically, the first beltof windbreak should be planted perpendicular to the wind direction about 200m to therail tracks to be protected at the windward side. Further, windbreaks should be plantedin 20m intervals to total 2-4 belts in parallel with the first one. Calligonum klernentzii,Haloxylon ammodendron, Salix psammophila, etc. may be planted. 25cm or longercuttings, or one year old seedlings in 30cm are proper for the plantation of Calligonumand Salix psammophila; one year old seedlings of 30cm in length suits planting ofHaloxylon ammodendron. Initial density should be kept in 10-12 trees/m. After treeplanted, drip irrigation or other types of irrigation shall be applied in low moisture dunesto facilitate survival of the plants.
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