麻江县退耕还林效益动态研究及综合评价

目的]分析退耕还林各林种树种的生长状况,评价退耕还林所产生的生态效益、经济效益和社会效益。方法]根据麻江县的地貌特征,将其分为东、中、西3个台阶。根据退耕还林的林种和树种分布情况,设置监测样地。2002—2014年对固定样地进行监测调查,研究不同样地树高、胸径和郁闭度的动态变化。结果]通过对比分析,生态林的经济效益和生态效益优于经济林,生态林中杉木模式和杉竹混交模式的生态效益和经济效益高于其他种植模式。结论]在退耕还林或其他造林项目中,麻江县应优先发展生态林,在发展生态林中应优先选用杉木纯林或杉竹混交模式。

Dynamic Study and Comprehensive Evaluation of the Benefit of Returning Farmland to Forest in Majiang County

Objective]To analyze the growth status of returning farmland to forest tree species in different forest species, and evaluate the ecological, economic and social benefits of returning farmland to forests.Method]According to the geomorphic features of Majiang County, it was divided into 3 steps: the East, the middle and the West.Monitoring plots were sete according to the project of returning farmland to forest and forest tree species distribution.A survey was carried out on the fixed sample plots during 2002-2014, the dynamics of tree height, DBH and canopy density were studied.Result]Through comparative analysis, ecological economic and ecological benefits than economic forest, ecological benefit and economic benefit of Cunninghamia lanceolata model and mixed model of Cunninghamia lanceolata and bamboo was higher than that of other planting models.Conclusion]It should give priority to the development of ecological forest in Mjiang County, in the development of ecological forest, priority should be given to the selection of Cunninghamia lanceolata model or mixed model of Cunninghamia lanceolata and bamboo.