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黑河流域防风固沙林生态效益研究——以甘肃省高台县为例 预览 被引量:4

Ecological effect of windbreaks and sand-fixation forests on Heihe River valley-A case study of Gaotai County,Gansu Province
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摘要 通过对黑河流域高台地区防风固沙林体系的定位观测,分析了该区防风固沙林20年来的生态效益变化。研究结果表明:在防风固沙效益方面,花棒×柠条锦鸡儿×梭梭混交林最好,梭梭纯林(6m×9m)最差;防风固沙林建立20年后,林内土壤粗粒沙(1.0~0.5mm)含量降低66.4%,而〈0.25mm的细沙和粉(黏)沙含量由12.8%提高至72.0%,土壤有机质含量提高30.1%,土壤全N增加48.3%,全P增加76.3%,全K增加58.0%,土壤pH值和全盐量均有降低。20年来防风固沙林的防风固沙效益和改土作用显著。 This paper,through positioning observation of sand-fixation windbreak systems in Gaotai region of Heihe River valley,analyzed changes in ecological effect of sand-fixation forest in recent 20 years.The analysis reveal following results: With regard wind prevention and sand-fixation,Headysarum scoparium×Caragana korshinskii×Halloxylon ammondendron windbreak system proves to be the best,while pure Haloxyllon ammondendron forest(6m×9m) is simply the worst.20 years after the establishment of sand-fixation forests,the intensity of crude sand particles(sand particles between 1.0~0.5mm in diameter) in the forest drops by 66.4%,while fine sand particles(less than 0.25mm) increase from 12.8% to 72.0%.Soil organic matter increases by 30.1%,total soil nitrogen by 48.3%,total soil phosphate by 76.3%,and total soil potassium by 58.0%.Both soil pH and total salt drop.There is a significant positive ecological effect of both sand-fixation forests and windbreaks on Heihe River valley soils in the past 20 years.
作者 廖空太 严子柱 满多清 张锦春 李得禄 LIAO Kong-Tai;YAN Zi-Zhu;MAN Duo-Qing;ZHANG Jin-Chun;LI De-Lu(1.Institute of Environmental and Engineering Research of Cold and Arid Regions;Chinese Academy of Sciences;Lanzhou 730000;China;2 Gansu Key Laboratory for Combating Desertification & Gansu Desert Control Research Institute;Wuwei 733000;China)
出处 《中国生态农业学报》 CAS CSCD 2007年第6期 26-29,共4页 Chinese Journal of Eco-Agriculture
基金 甘肃沙漠综合治理技术研究创新团队项目、甘肃省科学事业项目(QS041-C31-02)资助
关键词 黑河流域 防风固沙林 生态效益 改土效应 Heihe River valley,Sand-fixation forest,Ecological effect,Soil improvement
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