香格里拉县典型区段水土保持生态修复监测评价

Survey and Assessment on Eco-Restoration Aimed at Water and Soil Conservation in Typical Area of Shangrila County

采用空间代替时间的方法,通过径流小区观测、植被群落调查、土壤理化分析等途径,对水土保持生态修复区云南省香格里拉县纳帕海周边区域的生态修复效果进行监测评价.结果表明:青藏高原东南缘退化陆生生态系统,通过自然恢复和人为诱导修复,生态系统功能可以在较短时间内有所改善.根据植被群落结构和进展演替趋势分析,天然次生林的生态功能最好,人工混交林和灌丛次之,荒草丛最差;灌丛的土壤理化效应最佳;天然次生林和灌丛有较好地减少土壤流失的作用.坡耕地是退化最严重的脆弱生态系统类型.

By means of replacing space with time, the effect of eco - restoration around Lapahai Lake in Shangrila County was monitored and assessed by observing the watershed area, investigating into plant community structure, and by testing the chemical and physical properties of the local soils. It was showed that the functions of the degeneratedl and eco- systems in the southeastern marginal area of the Tibet Plateau might be improved in a short period of time through natural and man - induced restoration. It was proven by the succession tendency of the vegetation community structure that the eco - function of the natural secondary forest was the best, followed by artificial mixed forest and the wild grassland. It was showed that the shrub eco - system had the best improving effect on physical and chemical characteristics of the soil, while the natural secondary forest and shrub vegetation had good effect on water and soil conservation. Farmland was the most fragile eco- system with worst degradation.