丹江口水库库周水源涵养林植物种类筛选

plant species selection of water Resource conservation Forest in surrounding Areas of Danjiangkou Reservoir

摘要:

丹江口库区为南水北调中线工程的核心水源区,本文基于库周植物群落和环境因子的实地调查,应用除趋势典 范对应分析(DCCA)探究了该区群落物种分布与 10个环境因子的关系 。结果表明:①库周植物群落物种分布与环境因子 关系密切,10个环境因子共解释了群落物种分布格局的 62. 7%;②土壤 PH值是影响库周植物群落物种分布的关键环境因 子,其次为土壤厚度和土壤养分;③筛选出侧柏、白刺花和拟金茅等 20种对碱性、薄且贫瘠土壤有较好适应能力的 乡土植 物用于库周水源涵养林的营造 。本文的研究结果可为丹江口库区的植被恢复、水源涵养与净化工作提供依据。

Abstract:

Danjiangkou Reservoir is the core water source area for the Middle-Route of the south-to-North Transfer pro- ject. Based on investigation of 19plant communities , the relationships between species distribution and 10environmental factors were analyzed by Detrended canonical correspondence Analysis (DccA) in the surrounding areas of Danjiangkou Reservoir . The results showed that①It was closed related between spatial distribution of community species and the envi- ronmental factors . 10environmental factors accounted for 62. 7% of variation in species distribution in the surrounding ar- eas of Danjiangkou Reservoir;②The soil pH was the most important environmental factor on species distribution in this area, and the thickness and nutrient of soil played a role as well;③20native species including platycladus orientalis , So- phora davidii and Eulaliopsis binate etc . were selected in this study. All these species had good adaptability to alkaline , thin and nutrient-poor soil, and suited for construction of water resource conservation forest in the surrounding areas of Dan- jiangkou Reservoir . This study provides a new application of vegetation restoration and water conservation in Danjiangkou Reservoir .