地形因子对老哈河流域土壤有机碳的影响  

Impact of terrain factors on soil organic carbon in Laoha river basin

作　　者：郭月峰[1] 姚云峰[1] 秦富仓[1] 祁伟 王欣[1] 常伟东 

机构地区：[1]内蒙古农业大学,呼和浩特010018 [2]内蒙古水利水电勘测设计院,呼和浩特010020 [3]赤峰市敖汉旗林业局,敖汉旗024300

出　　处：《干旱区资源与环境》2014年第2期156-161,共6页Journal of Arid Land Resources and Environment

基　　金：内蒙古应用研究与开发计划项目"农林牧耦合生态系统固碳关键技术"(20110732);中国科学院战略性先导科技专项"京津风沙源治理工程(内蒙片)固碳速率和潜力研究"(XDA05060602)资助

摘　　要：研究流域尺度土壤有机碳与地形因子关系,对准确估计大尺度土壤有机碳变化具有重要意义。文中选取老哈河流域支流-黄花甸子流域为试验区,通过现场采样采集148个土壤剖面,2220个土壤样品(0-100cm),运用地统计学和GIS技术相结合的方法,研究土壤有机碳的空间分布特征与地形因子的关系。结果显示:研究区土壤有机碳与高程(440～906m)呈线性关系;与坡度呈单峰型曲线关系;土壤有机碳总体呈现半阴坡>半阳坡>阴坡>阳坡。主成分分析表明,海拔梯度变化是影响土壤有机碳的主导因素(p<0.05),其次是坡度(p<0.05),最后是坡向(p>0.05)。Understanding of soil organic carbon spatial distribution variability in a watershed scale is important for estimating soil organic carbon change in large scale,and explaining the role of soil organic carbon in global climate and environmental issues.148 sites in filed and 2220 soil samples（0-100 cm） were gathered,and geostatistics combined with geographical information system（GIS） technique were applied to analyze the spatial variability of soil organic carbon in Huang-Hua-Dian-Zi small watershed which belongs to the Laoha river tributary.The results show that the relationship between soil organic carbon and height（440 ～ 906m） is linear,showing a trend of decrease after the first increase with the slop increasing;the pattern of soil organic carbon can be ordered as half-shady slope half-sunny slope shady slope sunny slope.The relationship could be ordered as height（p 0.05） slop（p 0.05） slope direction（p 0.05） based on Principal Component Analysis.Elevation is the leading factor obviously,then the slop.

关 键 词：土壤有机碳 地形因子 克立格插值 

分 类 号：S153.621[农业科学—土壤学]