WHOLE SHOOT HYDRAULIC RESISTANCE IN QUERCUS SPECIES MEASURED WITH A NEW HIGH-PRESSURE FLOWMETER

被引：93

作者：

TYREE, MT

SINCLAIR, B

LU, P

GRANIER, A

机构：

[1] INRA, PHYSIOL INTEGREE ARBRE FRUITIER LAB, F-63039 CLERMONT FERRAND, FRANCE

[2] INRA, ECOPHYSIOL FORESTIERE LAB, F-54280 CHAMPENOUX, FRANCE

来源：

ANNALES DES SCIENCES FORESTIERES | 1993年 / 50卷 / 05期

关键词：

QUERCUS; HYDRAULIC RESISTANCE; WATER STRESS;

D O I：

10.1051/forest:19930501

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Whole shoot resistance to water flow was measured in 4 species of oak, Quercus robur L, Q petraea Matt Liebl, Q pubescens Willd, and Q rubra L. Shoots were 1.1 to 1.5 m long with 16-19 mm basal wood diameter and were 4-8 yr old. Whole shoot resistances accounted for 20-40% of the total resistance to water flow from soils to leaves based on comparisons with literature values. Leaf blade resistances accounted for 80-90% of total shoot resistances measured in this study. Stem resistances to water flow were approximate to twice as large in Q robur than in the other species which had comparable stem resistances. Differences in shoot resistance between Q robur versus Q petrae are discussed in terms of the differential response of these species to drought in mixed stands.

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收藏

页码：417 / 423

页数：7

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