Water loss from tree plantations in the tropics
Water loss from tree plantations in the tropics
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热带地区人工林的水流失
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
C. Somen
中科院分区：
文献类型：
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作者：
J. Kallarackal;C. Somen
本文报道了几个重要树种的水分利用特性，用于提高种植在喀拉拉邦，位于印度半岛的温暖潮湿的热带地区，这经历变量和季节性降雨。5个树种（细叶桉Eucalyptus tereticornis，细叶桉E. grandis，Acacia auriculiformis，Anacardium octenentale和Tectona grandis）在经历不同小气候和降雨的五个不同地点进行了调查。除T.在这个地方，巨桉是外来物种。他们的蒸腾水分损失（Et）估计从测量的小气候和生理参数，并将它们应用于Penman-Monteith方程。参考蒸散量（ET 0）计算使用FAO Penman-Monteith方程被用来评估树种之间和不同站点之间的蒸腾。还测定了气孔导度、叶面积指数、叶水势等生理生态参数与水分利用的关系。在种植园中，E.挖掘tereticornis是为了研究其扎根深度和模式，也是为了核实它们从潜水含水层中取水的说法。五个被调查的物种表现出蒸腾变化。这些变化解释了它们的生根深度，叶面积指数，气孔导度和土壤水分有效性。研究指出，在热带地区，不仅蒸腾失水量，而且生理生态特征也对评价一个树种的种植园发展起着重要作用。
This article reports the water use characteristics of a few important tree species used in raising plantations in Kerala, located in the warm humid tropics of peninsular India, which experiences variable and seasonal rainfall. Five tree species (Eucalyptus tereticornis, E. grandis, Acacia auriculiformis, Anacardium occidentale and Tectona grandis) have been investigated in five different sites experiencing different microclimates and rainfall. All the species except T. grandis are exotics in this location. Their transpirational water loss (Et) was estimated from measurements of microclimate and physiological parameters and applying them in the Penman-Monteith equation. The reference evapotranspiration (ET 0 ) calculated using the FAO Penman-Monteith equation was used to evaluate transpiration between the tree species and between the different sites. Ecophysiological parameters such as stomatal conductance, leaf area index, leaf water potential, etc. were also measured to relate them with water use. The root system in a plantation of E. tereticornis was excavated to study the rooting depth and pattern, and also to verify the allegation that they extract water from the phreatic aquifer. The five investigated species showed variations in transpiration. These variations are explained in terms of their rooting depth, leaf area index, stomatal conductance and soil water availability. The study points out the fact that not only the quantity of water loss through transpiration, but the ecophysiological features also play an important role in evaluating a species for plantation development in the tropics.