Spatial Variability of Soil Organic Carbon in a Watershed on the Loess Plateau

WANG Yun-Qiang; ZHANG Xing-Chang; ZHANG Jing-Li; LI Shun-Ji

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Spatial Variability of Soil Organic Carbon in a Watershed on the Loess Plateau

机译：黄土高原流域土壤有机碳的空间变异性

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Soil organic carbon (SOC) has great impacts on global warming,land degradation and food security.Classic statistical and geostatistical methods were used to characterize and compare the spatial heterogeneity of SOC and related factors,such as topography,soil type and land use,in the Liudaogou watershed on the Loess Plateau of North China.SOC concentrations followed a log-normal distribution with an arithmetic and geometric means of 23.4 and 21.3 g kg-1,respectively,were moderately variable (CV=75.9%),and demonstrated a moderate spatial dependence according to the nugget ratio (34.7%).The experimental variogram of SOC was best-fitted by a spherical model,after the spatial outliers had been detected and subsequently eliminated.Lower SOC concentrations were associated with higher elevations.Warp soils and farmland had the highest SOC concentrations,while aeolian sand soil and shrublands had the lowest SOC values.The geostatistical characteristics of SOC for the different soil and land use types were different.These patterns were closely related to the spatial structure of topography,and soil and land use types.

机译：土壤有机碳（SOC）对全球变暖，土地退化和粮食安全具有重大影响。采用经典的统计和地统计学方法来表征和比较土壤有机碳的空间异质性以及地形，土壤类型和土地利用等相关因素。 SOC浓度呈对数正态分布，算术和几何平均数分别为23.4和21.3 g kg-1，呈中等变化（CV = 75.9％），表现为中等根据球形核比率（34.7％）确定空间依赖性。在检测到空间离群值并随后将其消除之后，通过球形模型对SOC的实验变异图进行最佳拟合.SOC浓度越低与海拔越高相关。 SOC浓度最高，而风沙土和灌丛的SOC值最低。不同土壤和土地利用的SOC地统计特征这些类型与地形的空间结构以及土壤和土地利用类型密切相关。

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来源
《土壤圈（英文版）》 |2009年第4期|486-495|共10页
作者
WANG Yun-Qiang; ZHANG Xing-Chang; ZHANG Jing-Li; LI Shun-Ji;
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作者单位

State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau,Institute of Soil and Water Conser vation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100 (China);

Graduate University of the Chinese Academy of Scie;

State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau,Institute of Soil and Water Conser vation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100 (China);

College of Resources and Environment,Northwest A&F;

College of Resources and Environment,Northwest A&F University,Yangling 712100 (China);

College of Resources and Environment,Northwest A&F University,Yangling 712100 (China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
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Spatial Variability of Soil Organic Carbon in a Watershed on the Loess Plateau

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