Microscale spatial variability of redox potential in surface soil
文献类型：期刊论文
| 作者 | Yang, J ; Hu, YM ; Bu, RC |
| 刊名 | SOIL SCIENCE
 |
| 出版日期 | 2006 |
| 卷号 | 171期号:10页码:747-753 |
| 关键词 | platinum microelectrode soil E-h spatial variability Mexico silt loam |
| ISSN号 | 0038-075X |
| 通讯作者 | Yang, J, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China |
| 中文摘要 | Redox potential (E-h) is one of the most important chemical properties that control a variety of chemical or biochemical processes in soil ecosystem. Conventional Eh measurements that assume soil E-h as a random, independent variable provide a means for representing the unsampled neighborhood. However, the assumption is inappropriate if spatial dependence of the soil E-h occurs among the samples. This study was conducted to examine microscale spatial dependence and variability of E-h in surface soil using both classic and spatial variance analyses. Four undisturbed soil cores, 13 cm in depth and 10 cm in diameter, were taken from the Ap horizon of Mexico silt loam (fine montmorillonitic, mesic Udollic Ochraqualfs). Soil E-h was measured in situ at 1-cm horizontal and vertical intervals by the platinum microelectrode system and the spatial-dependent structure determined by semivariogram function. The E-h variability in the vertical intervals was higher than that in the horizontal intervals, indicating a higher degree of the vertical heterogeneity. All cores showed the spatial dependence of soil E-h with either spherical or exponential function, but only one core exhibited the range of spatial dependence. Spatially dependent variances accounted for a large portion of the sample total variance, which might be attributed to the E-h trends over soil depth. This study demonstrated that spatial dependence of soil E-h does exist in microscale, and the extent or degree of the spatial variability varies with sampling location and scale, which may affect the extent of a means for representing unsampled neighborhood. Characterization of microscale spatial variability would be a useful tool in revealing or investigating the microscale heterogeneous interactions among soil constituents, plants, and environment. |
| 学科主题 | Soil Science |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000241448900002 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/54847]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | Yang, J,Hu, YM,Bu, RC. Microscale spatial variability of redox potential in surface soil[J]. SOIL SCIENCE,2006,171(10):747-753. |
| APA | Yang, J,Hu, YM,&Bu, RC.(2006).Microscale spatial variability of redox potential in surface soil.SOIL SCIENCE,171(10),747-753. |
| MLA | Yang, J,et al."Microscale spatial variability of redox potential in surface soil".SOIL SCIENCE 171.10(2006):747-753. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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