摘要
干热河谷是我国西南地区特殊的生态类型 ,通过分析云南元谋干热河谷区土地荒漠的面积(海拔 1 3 50 m以下 ,荒漠化土地面积 1 0 0 6.0 2 km2 ,占该区总面积的 70 .1 5% ) ,表现特征 (地形破碎 ,劣地广布 ,以肉质常绿灌丛为代表的类似荒漠植被 ,地表水分条件恶化 ,土壤贫瘠 )及形成原因 (自然原因 :地质基础稳定性差 ,地貌类型多样 ,气候炎热干燥 ;人为原因 :人口激增增加环境压力 ,垦荒 ,乱砍滥伐 ,过度放牧 ) ,提出了土地荒漠化的防治对策 (制定正确的政策 ,依法防治土地荒漠化 ;控制人口增长 ,减轻人口对荒漠化土地的压力 ;加强宣传教育 ,提高农民的生态意识 ;保护现有森林 ,加强植树造林 ,建立多层次的防护林体系 ;巩固和加强农田水利基础建设 )
Dry hot valley is a special ecological type in the southwest area of China In the paper,analyzed the desertified land area (the desertified area is 1 006 02 km 2 below 1 000 m which takes up 70 15% of the total area),the expressed characteristics of desertification (Broken landform wide distributed bad land,desertification like vegetation with fleshy evergreen shrub as main type,deteriorated surface water conditions and interfile soil)and its formation causes (Natural causes low stability of geological base and many tapes of geomorphology hot and dry climate Human influence speed population increase added to environmental pressure,wasteland reclaimation,forest destroying and overgrazing) in Yuanmou dry hot valley in Yunnnan Province,proposed countermeasures (formulate correct policy and control land desertification by law,control population increase and lessen environmental pressure,strengthen propaganda and education to improve people's ecological consciousness,protect existing forest,strengthen tree planting and establish various shelter forest system,strengthen the basic construction of cultivated land water fatilities )to control land desertificationSTUDIESON
出处
《云南地理环境研究》
2000年第1期1-8,共8页
Yunnan Geographic Environment Research
基金
国家"九五"攻关项目! (96-92 0 -1 3 -0 3 )"云南元谋干热河谷荒漠生态系统综合整治与区域可持续发展试验示范研究"
国家自然科学
