Soil water retention curves for the major soil types of the Kruger National Park
Soil water retention curves for the major soil types of the Kruger National Park
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DOI：
10.4102/koedoe.v56i1.1228
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发表时间：
2014-01-01
期刊：
影响因子：
1.1
通讯作者：
Higgins, Steven I.
中科院分区：
文献类型：
--
作者：
Buitenwerf, Robert;Kulmatiski, Andrew;Higgins, Steven I.
土壤水势对植物蒸腾作用、碳循环和生物圈-大气相互作用至关重要，但在野外难以测量。体积含水量和重量含水量在田间测量起来既简单又便宜，但不能很好地代表植物的有效水分。利用土壤水分特征曲线可以将土壤含水量换算成土壤水势。我们提供经验推导的土壤水分保持曲线七种土壤类型的克鲁格国家公园，南非。特定地点的曲线产生了很好的估计土壤水分含量值的土壤水势。来自相同地质基质的土壤的曲线相似，可能允许使用玄武岩土壤的一条曲线和花岗岩土壤的另一条曲线。预计该数据集将有助于水文学家和生态生理学家了解该地区当前和不断变化的气候条件下的水动力学，碳循环和生物圈-大气相互作用。
Soil water potential is crucial to plant transpiration and thus to carbon cycling and biosphere-atmosphere interactions, yet it is difficult to measure in the field. Volumetric and gravimetric water contents are easy and cheap to measure in the field, but can be a poor proxy of plant-available water. Soil water content can be transformed to water potential using soil moisture retention curves. We provide empirically derived soil moisture retention curves for seven soil types in the Kruger National Park, South Africa. Site-specific curves produced excellent estimates of soil water potential from soil water content values. Curves from soils derived from the same geological substrate were similar, potentially allowing for the use of one curve for basalt soils and another for granite soils. It is anticipated that this dataset will help hydrologists and ecophysiologists understand water dynamics, carbon cycling and biosphere-atmosphere interactions under current and changing climatic conditions in the region.