Diurnal changes in branch diameter as indicator of water status of Hinoki cypress Chamaecyparis obtusa
Diurnal changes in branch diameter as indicator of water status of Hinoki cypress Chamaecyparis obtusa
复制标题
树枝直径的日变化作为扁柏水分状况的指标
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
E. Shibata
中科院分区：
文献类型：
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作者：
M. Ueda;E. Shibata
摘要。通过测量一棵27岁的长沙柏树最大展枝直径的变化，研究了用应变片监测树木水分状况的方法。枝条中木质部直径的变化比韧皮部直径的变化与叶片水势的变化关系更为密切。由于木质部直径的日变化与水分平衡（液流速度-蒸腾）的日变化相匹配，因此用应变计测量木质部直径的变化对评价木质部水分状况是有用的。
Abstract. We investigated use of strain gauges for monitoring the water status of trees by measuring changes in the diameter of the largest spreading branch of a 27-year-old Chamaecyparis obtusa tree. The change in xylem diameter in the branch is more closely related than the change in phloem diameter to the change in leaf water potential. Since the diurnal changes in diameter match the diurnal changes in water balance (sap flow velocity – transpiration), measuring the change in xylem diameter using a strain gauge is useful in evaluating the water status of C. obtusa.