稀释
牙冠(牙科)
光亮桉
胸径
导水率
桉树
植物
园艺
数学
环境科学
生物
土壤科学
生态学
材料科学
土壤水分
复合材料
作者
J. L. Medhurst,C. L. Beadle
标识
DOI:10.1046/j.1365-3040.2002.00880.x
摘要
Abstract This study tested the hypothesis that the relationship between leaf area (projected, or one‐sided) and sapwood area in Eucalyptus nitens (Deane and Maiden) Maiden is affected by thinning treatment. However, no difference in the relationship between leaf area and sapwood area was found 8 years after thinning. This result suggests that a single regression equation can be used to predict the leaf area of trees in thinned and unthinned stands. The relationship was non‐linear, implying a causal relationship between growth rate and the ratio of leaf area to sapwood area ( A l : A s ). Sapwood hydraulic conductivity increased by approximately 100% from breast height to crown base, whereas sapwood area decreased by 19%. This implies that the efficiency of water transport through the sapwood increased by 60% along this length. This conclusion is supported by the A l : A s relationships which showed that the sapwood area at crown base supported, on average, close to 60% more leaf area than a similar amount of sapwood area at breast height. That large trees in this study had greater hydraulic conductivity and higher A l : A s lends support to the argument that resource capture, and hence growth rate, influence sapwood hydraulic conductivity.
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