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Ralationship of Topographic Factors and Soil Organic Carbon Density under Plantations: A Case in Loess Hilly Region in Western Shanxi Province, China
Author(s): Lu Xiaoyu, Zhang Hongjiang, Cheng Jinhua, Ma Xijun, Zhang Junyu
Pages: 48-
50,58
Year: 2013
Issue:
1
Journal: Journal of Northeast Forestry University
Keyword: Loess hilly region; Soil organic carbon (SOD) density; Plantations; Ordinary least squares (OLS);
Abstract: 为了探究晋西黄土丘陵区不同人工林下土壤有机碳密度的性质,在该区选取了4种典型人工林配置模式,对其土壤上层(0 ~20 cm)和下层(20 ~40 cm)的有机碳密度进行了测定和比较,分析了不同人工林下土壤有机碳密度分布的特性.借助普通最小二乘法(OLS),对地形因子与土壤有机碳密度之间的量化关系进行了分析.结果表明:土壤碳密度与全N、水解性N均在0.01水平上显著正相关.林下的土壤碳密度排序为针阔混交林>人工针叶林>人工阔叶林>灌木林.土壤碳密度在不同地形条件下存在差异,但地形差异只能解释土壤碳密度差异的18.4%.土壤碳密度随着坡度的增大而减少,从阳坡到阴坡不断增加,坡面位置的分布特征则为坡顶<坡面<坡脚.
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