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沙障成林的固沙工程及生态效益研究 预览 被引量:28

SAND FIXATION PROJECT WITH FOREST SAND BARRIER AND ITS ECOLOGICAL BENEFIT
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摘要 温带亚湿润地区的流动沙地具有特殊的水分状况。某些风口地段的流动沙丘,植被难以成活,但利用活体杨树枝条扦插沙障,可以成活为林,是一项机械固沙与生物固沙相统一的治沙工程。沙障成林后,生态效益明显:春季大风日,林风内速削减15% ̄41.5%,夏季林内温度降低1 ̄3℃,空气湿度增加11% ̄22%;林下土壤稳定发育,表土层粘粒增加5% ̄10%,土壤有机质增加1%,土壤结构形成;沙丘植被逐渐演替,由裸沙地→沙 The mobile dunes in the sub humid temperate zone pose the specific water regime. Some wind gaps are difficult to support planted trees, but the sand barrier consisted of alive branches of poplar can survive to become the forest. This sand controlling project has achieved the integratation of mechanical sand controlling and biological sand controlling. The obvious ecological benefit can be obtained after the sand barriers becoming forest: in the gale days during Spring, the wind speed can be reduced by 15% ̄41 5%; in Summer, the air temperature droped by 1 ̄3℃,the air humidity increased by 11% ̄22%;the soil under the forest grows steadily, the glutinous granules in the surface layer increased by 5% ̄10% and the organic matter of soil increased by 1%; The plantation successes gradually from uncovered sandland to Artemisia desertorum+Agriophyllum erenarium to Potentilla filipendla+Achnatherum avinoides to Stipa baicalensis+Potentilla filipendula and moss. At last, a stable forest grass system has become and the surrounding ecological environment has been improved also.
作者 许林书 许喜巍 Xu Linshu Xu Jiawei (Department of Geography, Northeast Normal University, Changchun,130024)
出处 《中国沙漠》 CSCD 北大核心 1996年第4期 392-396,共5页 Journal of Desert Research
基金 吉林省科委项目
关键词 流动沙丘 杨树枝条 沙障 成林 固沙林 The sub humid temperate zone Mobile dunes Alive branches of poplar Sand barrier
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参考文献2

  • 1许林书,松嫩沙地的土地沙漠化研究,1995年 被引量:1
  • 2许嘉巍,吉林省中西部沙化土地景观生态建设,1990年 被引量:1

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