大兴安岭不同林分类型落叶松天然林水源涵养功能综合评价

Comprehensive Evaluation on Water Conservation Function of the Different Types of Larch Natural Forests in Da Hinggan Mountains

以大兴安岭不同类型落叶松天然林为研究对象,从林冠层、枯落物层、土壤层和林分生产力等方面选择11项评价指标,通过层次分析法确定评价指标的权重,应用主成分分析方法对不同类型落叶松天然林涵养水源功能进行综合评价。旨在为大兴安岭落叶松天然林合理经营及提高落叶松天然林涵养水源功能提供有力的依据。研究结果表明:杜鹃+落叶松林的涵养水源功能表现最好,其次是落叶松纯林;白桦+落叶松林水源涵养功能在5种林分类型中最差。所以在大兴安岭地区应重点保护杜鹃+落叶松林,以便增加流域的水源涵养功能。

The different types of larch natural forests in Da Hinggan Mountains were taken as the research object. 11 eva1uation indexes were determined from forest canopy layer, litter layer, soil layer and productive forces etc, and weight of evaluation were carried out by the analytic hierarchy process and principal component analysis method to evaluate the differences of water conservation function of the different types of larch natural forests, and aimed at the reasonable management of the larch natural forests and improved water conservation function of larch forests provide a strong basis. The results showed that the Rhododendron-Larix had better water conservation function, the Larix pure the next, Birch-larix the worst. Focus on the protection of the Rhododendron-Larix should be taken in the Da Hinggan Mountains region, in order to increase the water conservation function of the drainage basin.