摘要
以福建省福州市21年生沿海木麻黄林地土壤为研究对象，结合样地法和地统计学测定并分析了不同土壤层pH值的空间变异特征。结果表明：1）该木麻黄林土壤pH值整体呈强酸性，0～20（A）、20～40（B）和40～60 cm（C）土壤层的pH值均值分别为4.04、4.16和4.14；变异系数分别为10.73%、9.13%和13.26%；2） A、B和C土壤层, pH值块金效应值分别为0.879、0.233和0.080,空间变异最优模型分别为线性有基台值模型、指数模型和指数模型。克里格最优插值分析结果显示表层土壤pH值受结构影响，底层则受林分影响为主；3）该林地土壤酸化主要受土壤母质、大气酸沉降、土壤含水量和林分等因素共同作用。研究结果为沿海木麻黄及其它防护林的保护与建设提供理论参考依据。
The spatial variations of soil pH values at different soil-layers in a 21-year-old coastal forest ofCasuarina equisetifoliaL. in Fuzhou were analyzed by using geo-statistics combining withifeld work. The results show that （1） the soil pH in the surveyed forest was strong acidity, the mean values of soil pH in 0～20 cm （A layer）, 20～40 cm （B layer） and 40～60 cm（C layer） were 4.04, 4.16 and 4.14 respectively; the variable coefifcients of each layer were 10.73%, 9.13% and 13.26%. （2） the Nugget effect values of pH in A, B and C layers were 0.879, 0.233 and 0.080 respectively; and the optimal spatial autocorrelation models of pH values in Layer A, B and C were linear with sill model, exponential model and exponential model respectively; the results of The optimal interpolation kriging analysis indicated that soil pH values in A-layer were affected by structural factor while the ones in B-layer and C-layer were mainly influenced by forest factors. （3）the forest-land soil acidiifcation was due to several reasons such as soil parent material, air acid deposition, soil water content and forest stands etc.. The findings provide a theoretical basis for protecting and constructing coastal forests ofC. equisetifolia and other protective forests in China.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2015年第11期80-85,共6页
Journal of Central South University of Forestry & Technology
基金
福建省教育厅项目"沿海防护林木麻黄幼苗根系分形特征研究"(K80MKT27A)
教育部高等学校博士学科点专项科研基金项目"邓恩桉对氮
硫复合沉降增加的氧化应答机制研究"(20123515110011)
关键词
木麻黄
沿海防护林
林地土壤pH值
空间变异
福建省福州市
Casuarina equisetifolia
coastal protection forest
forest-land soil pH
spatial variation
Fuzhou city,Fujian province
作者简介
陈灿，讲师，博士
通讯作者：洪伟，教授；E-mail：fjhongwei@126．com
