三峡库区水土保持树种选择研究

Study on Trees Selection for Water and Soil Conservartionin The Three Gorges Reservoir Area

摘要:

摘要：为给三峡库区植被恢复树种选择提供科学依据，笔者针对三峡库区的自然、社会和生态条件，构建了该区水土保持树种选择综合评价指标体系，并运用层次分析法确定各指标权重，提出了研究区水土保持树种选择数量化评价模型。应用该评价模型对48个初选树种进行了综合评价，并依据最优分割法将参选树种划分成3个等级。结果表明：马尾松、青冈栎和杉木等17个树种综合指数较高，为三峡库区水土保持Ⅰ级树种；部分乔木树种和经济林树种共21个为三峡库区水土保持Ⅱ级树种；部分经济林树种和全部灌木树种共10个为三峡库区水土保持Ⅲ级树种。在此基础上确定了三峡库区防护林体系建设各区树种选择优先次序。

Abstract:

Abstract:In order to provide scientifical basis for water and soil conservation in the Three Gorges Reservoir Area,based on the natural, social and ecological condition in The Three Gorges Reservoir Area. The comprehensive evaluating index system for it was built.The index weight was determined by AHP. The model was evaluated and grade 48 kinds of tree species. According to the method of optimum cut, 3 grades were classified. It showed that 17 kinds of tree species such as Pinus massoniana Lamb.,Cyclobalanopsis glauca,Cunninghamia lanceolata (Lamb.)Hooketc. were the first grade, 21 kinds of tree species including some arbor tree species and some nontimber tree species were the second grade, 10 kinds of tree species including some nontimber tree species and all shrub trees were the third grade for water and soil conservation. The optional trees for each belt of protection forest system in The Three Gorges Reservoir Area were also proposed by authors.