云南南涧干热退化山地植被恢复重建及其效益初析

Vegetation restoration of degraded mountainous area of dry-hot river valley in Nanjian county and its benefits analysis

从１９８９～１９９７年，通过对云南南涧干热河谷退化山地生物生态工程治理试验示范研究，筛选出以台湾相思、马占相思、大叶桉、马鹿花、山毛豆、香根草、大翼豆等为主的２０余种适应干热生境和退化山地植被恢复的乔、灌、草植物；并根据不同立地条件营建了多种由这些筛选的物种组合的植物群落，采用内倾式水平带状整地与调控水系统建设相结合的生物治理措施，森林覆盖率从原来的５％增加到６５％，项目投产比为１：２以上，取得了良好的社会、生态和经济效益．

The bio-ecological engineering for prevention and control of debris flow in degradedmountainous areas of Nanjian county in Yunnan was conducted from 1989 to 1997. Acacia richii,A. Margium, Eucalyptus robusta, Pueraria wallichii, Tephrosia caudida, Vetiveria zizanoides andMaerotylama axillare etc. were selected from 65 local and introduced species as silvicultural trees,shrubs and herbs of adaptation to dry-hot environment and degraded mountainous soil. The levelbelt terracing together with water storage system construction is a suitable land preparation mode toplant growth and soil erosion control in the area. The different functional communities withoptimized combination of tree, shrub and herb were made according to the conditions of differentsection. The ratio of forest cover in the area had increased from 5% to 65% before rehabilitation,and the ratio of investment and product had exceeded l: 2. The practice proved that these measures were much effective to restore vegetation and to control soil erosion in dry-hot degenerativemountainors area