在野外调查、取样和室内试验分析相结合的基础上,利用灰色关联度分析方法定量分析了韩江流域典型区主要森林类型的土壤肥力状况,并进行了综合评价排序.研究结果表明:6种林分土壤肥力关联度排序为天然常绿阔叶林(0.920 16)＞针阔混交林(0.892 87)＞灌木林(0.813 07)＞桉树人工林(0.788 58)＞竹林(0.759 85)＞马尾松林(0.742 96),天然常绿阔叶林和针阔混交林土壤比较肥沃,马尾松林土壤肥力相对较差.说明土壤肥力不仅与土壤理化性质有关,而且与林地凋落物的蓄积和分解状况有关.%Based on field investigation,soil sampling and laboratory experiment,soil fertilities of main forest soils in a typical region of the Hanjiang River Basin were analyzed quantitatively using the grey relational analysis method,and sequencing based on comprehensive evaluation conducted.Results show that soil fertility varied significantly between the soils of the six types of forests surveyed,which followed an order of evergreen broad-leaved forest (0.920 16) ＞ mixed conifer forest (theropencedrymion) (0.892 87) ＞ shrubberies (0.813 07) ＞ eucalyptus plantation (0.788 58) ＞ Phyllostachys pubescens forest (0.759 85) ＞ Pinus massoniana forest (0.742 96).The soils of the first two were obviously the most fertile of the six,and the last is the poorest,which demonstrates that soil fertility is not only related to soil physico-chemical properties,but also to accumulation and decomposition of the litters therein.
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