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作 者 ：黄元仿,周志宇,苑小勇,张红艳

期 刊 ：生态学报 2004年 24卷 12期 页码：2776~2781

关键词：干旱荒漠区；土壤有机质；空间变异；趋势效应；

Keywords:arid desert area, soil organic matter, spatial variability, trend effect,

摘 要 ：以内蒙古阿拉善左旗为例 ,研究了干旱荒漠区土壤有机质的空间变异特征。传统统计分析结果表明 ,研究区内土壤有机质含量总体水平较低 ,平均为 6 .6 5 g/ kg;变异系数为 1.4 2 ,属强变异。在半方差结构分析和球状模型套合的基础上 ,结合普通Kriging插值方法 ,分析了土壤有机质的地统计特征。比较不同趋势效应和异向性的普通 Kriging插值的误差结果表明 ,宜考虑各向异性和二阶趋势效应。获得了研究区土壤有机质含量的等值线图 ,并分析了其空间分布规律。

Abstract:Alxa Left Banner in the west of the Inner Mongolia Autonomous Region, China, is a typical arid desert area in the middle temperate zone between the northern border of China and the eastern Alxa Plateau. Due to overgrazing and human activities, soil degradation (or desertification) in the area is becoming increasingly severe due to loss of soil organic matter (SOM). Low SOM content impacts soil quality directly in this arid desert area. Understanding the spatial variation and distribution pattern of SOM cont...

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