Temporal stability in soil water content patterns across agricultural fields
Temporal stability in soil water content patterns across agricultural fields
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DOI：
10.1016/j.catena.2007.09.010
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发表时间：
2008-03-15
期刊：
影响因子：
6.2
通讯作者：
Cady, R. E.
中科院分区：
文献类型：
--
作者：
Guber, A. K.;Gish, T. J.;Cady, R. E.
当一个领域或一个小流域反复调查土壤含水量，位置往往可以确定土壤含水量始终大于或始终小于研究区域的平均水平。这种现象被称为土壤水分空间格局的时间稳定性、时间稳定性、时间持续性或等级稳定性。时间稳定性是相当感兴趣的，在方便放大观测到的土壤含水量，以获得整个观测区域的平均值，改善土壤水分监测策略，并纠正缺失数据的监测结果。这项工作的目的是促进现有的知识基础上的时间稳定性，在土壤水分模式，使用频繁的多深度测量与多传感器电容探头（MCP）安装在一个粗糙的质地土壤下多年的玉米生产。从2001年5月至2002年12月连续观测20个月，每隔10分钟测量10、30、50和80 cm深度的含水量。MCP揭示了土壤水分含量模式的时间稳定性。时间稳定性被认为是增加与深度。统计学假设不能被拒绝（P
When a field or a small watershed is repeatedly surveyed for soil water content, locations can often be identified where soil water contents are either consistently larger or consistently less than the study area average. This phenomenon has been called temporal stability, time stability, temporal persistence, or rank stability in spatial patterns of soil water contents. Temporal stability is of considerable interest in terms of facilitating upscaling of observed soil water contents to obtain average values across the observation area, improving soil water monitoring strategies, and correcting the monitoring results for missing data. The objective of this work was to contribute to the existing knowledge base on temporal stability in soil water patterns using frequent multi-depth measurements with Multisensor Capacitance Probes (MCPs) installed in a coarse-texture soil under multi-year corn production. Water contents at 10, 30, 50, and 80 cm depths were measured every 10 min for 20 months of continuous observation from May 200 1 to December 2002. The MCPs revealed temporal stability in soil water content patterns. Temporal stability was found to increase with depth. The statistical hypothesis could not be rejected (P