干旱区生态环境知识资源中心(Arid): 松嫩平原西部土壤有机碳空间变异研究以吉林省通榆县为例

Arid

	松嫩平原西部土壤有机碳空间变异研究以吉林省通榆县为例
其他题名	Study on Spatial Variability of Soil Organic Carbon Content in the West Songnen Plain --A Case Study in Tongyu County, Jilin Province
	任春颖; 张柏; 王宗明; 宋开山; 刘殿伟
ISSN	1001-4675
出版年	2008
卷号	25 期号:5 页码:631-636
中文摘要	结合统计方法、地统计学方法和GIS技术，以吉林省通榆县为例，分析其土壤有机碳的空间变异特征。结果表明：通榆县土壤有机碳含量普遍较低，平均值仅为0．76％，变幅0．13％～3．72％。利用局部Morans I指数检验法得到土壤样点中存在的14个异常值及其位置，剔除异常值后的变异函数理论模型块金效应小、决定系数高，土壤有机碳含量具有较强的空间自相关性，结构性因素（气候、母质、地形、土壤类型等）对其空间变异的贡献较大。通榆县土壤有机碳含量自西向东逐渐增加，且呈近似南北向的条带状梯度变化，这与该区域地势西高东低的空间格局存在较强的相关性（r=-0．64）。统计检验表明，通榆县内西部土壤有机碳含量明显低于东部。西部干旱少雨、土壤质地偏沙，且地势较高等环境因子是形成上述空间分布格局的主要原因。
英文摘要	In this study 192 topsoil samples were collected from Tongyu County, a typical area of farming-pastoral ecotone in Jilin Province. The spatial distribution and variability of soil organic carbon （SOC） content are analyzed using the means of statistics, geostatistics and geographical information system （GIS）. The results show that the SOC content in the county is universally low, it varies in a range of 0.13% - 3.72%, and its average is 0.76% only. A theoretical model is derived from analyzing the soil samples excluding those with exceptional values of SOC content, its nugget effect is low, and its determination coefficient is high. Moreover, there is a strong spatial autocorrelation of SOC content, and the contribution of structural factors （ such as climate, parent soil material, landform and agrotype） to the spatial variability of SOC content is high. The results also reveal that the SOC content increases gradually from the west to the east, and it changes in an approximate south-north banded gradient, which is closely related to the terrain （r = -0.64）. The test reveals that such spatial distribution pattern of SOC content is mainly affected by the environmental factors, such as the arid climate, sandy soil texture and high terrain.
中文关键词	土壤有机碳 ; 空间变异 ; 地统计学 ; 通榆县 ; 吉林省
英文关键词	soil organic carbon （SOC） spatial variability geostatistics. GIS Tongyu County Jilin Province.
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3387768
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222342
作者单位	中国科学院东北地理与农业生态研究所, 长春, 吉林 130012, 中国
推荐引用方式 GB/T 7714	任春颖,张柏,王宗明,等. 松嫩平原西部土壤有机碳空间变异研究以吉林省通榆县为例[J],2008,25(5):631-636.
APA	任春颖,张柏,王宗明,宋开山,&刘殿伟.(2008).松嫩平原西部土壤有机碳空间变异研究以吉林省通榆县为例.,25(5),631-636.
MLA	任春颖,et al."松嫩平原西部土壤有机碳空间变异研究以吉林省通榆县为例".25.5(2008):631-636.