退耕雷竹林水土保持功能影响因素的灰色关联分析

Application of Grey Relation Analysis to Study Influencing Factors on Function of Soil and Water Conservation of Phyllostachys praecox cv. prevernalis Forest in the Project of Returning Farmland to Forest

为了探讨雷竹林水土保持功能的主要影响因子,在对江西万年县退耕雷竹林水土保持功能的14个影响因子进行监测的基础上,应用灰色关联分析法进行了分析。结果表明:影响退耕雷竹林水土保持功能发挥的关键因素是林分平均胸径,其次是土壤体积含水量和土壤团聚体含量(>0.25 mm)。

To understand the key influencing factors on function of soil and water conservation of Phyllostachys praecox cv. prevernalis forest applied in the project of returning farmland to forest, 14 influencing factor were monitored in Wannian county, Jiangxi province, and were analyzed by the method by Grey Relation Analysis （ GRA ）. The results show that the stand average diameter at breast height （DBH） was the most significant factor affecting the function of soil and water conserva- tion of Phyllostachys praecox cv. prevernalis forest, and the second factor were soil volumetric moisture content and soil aggregated content（ 〉 0.25 mm）.