太行山北段东麓采石废弃地立地类型划分及评价

Site type classification and evaluation for abandoned quarry at the eastern foot of the northern section of Taihang Mountain

为了加快太行山北段东麓采石废弃地的植被恢复,选取地形、植被、土壤等14个指标,采用相关性分析、主成分分析、聚类分析等方法,探讨影响采石废弃地植被恢复的主要影响因子,明确划分太行山北段东麓采石废弃地的立地类型并进行立地评价。结果表明：1）土壤养分质量分数、土壤层厚度和地形特征等因子是研究区植被恢复的主要限制性因子,同时也是研究区采石废弃地上判断某一立地条件优劣的重要因子;2）依据主成分分析、聚类分析结果以及调查结果,可将研究区采石废弃地分成8类立地类型;3）根据立地质量评价结果,可将立地类型划分为立地条件较好的立地（综合得分≥24）、立地条件稍差的立地（综合得分20~24）、立地条件较差的立地（综合得分18~20）和立地条件较为恶劣的立地（综合得分〈18）4类,并按照立地情况提出相应的植被恢复建议。

In order to rehabilitate the vegetation of the abandoned quarry at the eastern foot of the northern section of Taihang Mountain,we analyzed 14 indicators in terms of topography,vegetation and soil,and determined the main impact factors that affect vegetation recovery, by using correlation analysis,principal component analysis and clustering analysis. The site types of the abandoned quarry were divided and their quality was evaluated. The results showed that soil nutrient content,soil layer thickness and topography feature were the main factors restricting the vegetation restoration in the study area as well as the important factors to assess the condition of a waste site in the studied quarry area.Based on field investigation and the results of principal component analysis and clustering analysis,the abandoned quarry in the study area was divided into eight site types. According to the site quality evaluation,the sample sites were divided into four categories,namely,site with good conditions（ the overall score was greater than 24）,site with slightly poor conditions（ the overall score was between 20 and 24）,site with poor conditions（ the overall score was between 18 and 20） and site with very poor conditions（ the overall score was less than 18）. Finally,some suggestions for vegetation restoration were put forward in accordance with the site conditions.