Delineation of Site-Specific Management Zones Based on Temporal and Spatial Variability of Soil Electrical Conductivity

LI Yan; SHI Zhou; LI Feng

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Delineation of Site-Specific Management Zones Based on Temporal and Spatial Variability of Soil Electrical Conductivity

机译：基于土壤电导率时空变化的特定场地管理区划

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A coastal saline field of 10.5 ha was selected as the study site and 122 bulk electrical conductivity(ECb)measurements were performed thrice in situ in the topsoil(0-20 cm)across the field using a hand held device to assess the spatial variability and temporal stability of the distribution of soil electrical conductivity(EC),to identify the management zones using cluster analysis based on the spatiotemporal variability of soil EC,and to evaluate the probable potential for sitespecific management in coastal regions with conventional statistics and geostatistical techniques.The results indicated high coefficients of variation for topsoil salinity over all the three samplings.The spatial structure of the salinity variability remained relatively stable with time.Kriged contour maps,drawn on the basis of spatial variance structure of the data.showed the spatial trend of the salinity distribution and revealed areas of consistently high or consistently low salinity,while a temporal stability map indicated stable and unstable regions.On the basis of the spatiotemporal characteristics.cluster analysis divided the site into three potential management zones.each with difierent characteristics that could have an impact on the way the field was managed.On the basis of the clearly defined management zones it was concluded that coastal saline land could be managed in a site-specific way.

机译：选择10.5公顷的沿海盐田作为研究地点，并使用手持式装置在整个田间的表土（0-20厘米）中进行了三次三次现场电导率（ECb）测量，以评估空间变异性和土壤电导率（EC）分布的时间稳定性，使用基于土壤EC时空变化的聚类分析来确定管理区域，并使用常规统计和地统计学方法评估沿海地区特定地点管理的可能性。结果表明在所有三个采样中表土盐度的变异系数都很高。盐度变异性的空间结构随时间保持相对稳定。在数据的空间方差结构的基础上绘制了Kriged等高线图，显示了土壤的盐度变化趋势。盐度分布，揭示出盐度始终较高或较低的区域，同时具有时间稳定性地图显示了稳定和不稳定的区域。根据时空特征，聚类分析将场地划分为三个潜在的管理区域，每个区域都有不同的特征，可能会影响野外管理的方式。管理区域得出结论，沿海盐碱地可以按特定地点进行管理。

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《土壤圈（英文版）》 |2007年第2期|156-164|共9页
作者
LI Yan; SHI Zhou; LI Feng;
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作者单位

Institute of Agricultural Remote Sensing and Information Technology Applicationl Zhejiang University, Hangzhou 310029 (China);

Institute of Land Science and Property Management, College of Southeast Land Management, Zhejiang University, Hangzhou 310029 (China);

Institute of Agricultural Remote Sensing and Information Technology Applicationl Zhejiang University, Hangzhou 310029 (China);

Department of Environmental Engineering, Zhejiang University, Hangzhou 310029(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;
关键词
coastal saline field; management zone; soil electrical conductivity; spatial variability; temporal variability;

机译：滨海盐田;管理区;土壤电导率;空间变异性;时间变异性;

Delineation of Site-Specific Management Zones Based on Temporal and Spatial Variability of Soil Electrical Conductivity

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