NDLI: Mathematical consideration of the pipe model theory in woody plant species

Content Provider	Springer Nature Link
Author	Ogawa, Kazuharu
Copyright Year	2014
Abstract	Using the pipe model theory, a quantitative relationship between leaves and non-green plant organs has been defined that depends on tree size. In the pipe model theory, the cumulative mass of leaves and the density of non-photosynthetic organs at depth (z) from the crown surface of a woody plant are defined as F(z) and C(z), respectively. In this study, the F(z)–C(z) relationship was approximated by a non-rectangular hyperbola for Abies veitchii, Chamaecyparis obtusa, Cryptomeria japonica and Larix leptolepis. The initial slope of the non-rectangular hyperbola, corresponding to the specific pipe length, varied among individual trees. The relationship between the initial slope and the square of the stem diameter at the crown base, which can be expressed as a power function with positive exponents, was species dependent. Based on the size dependence of the initial slope, the value of the allometric exponent describing the relationship between leaf mass and the square of the stem diameter at the crown base was theoretically shown to exceed unity. Empirically, the value of the allometric exponent usually exceeds two. However, in the allometric model developed here, the allometric exponent between the leaf mass and the square of the stem diameter at the crown base did not differ significantly from unity, indicating that the leaf mass was directly proportional to the stem cross-sectional area at the crown base.
Starting Page	695
Ending Page	704
Page Count	10
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	29
Issue Number	3
e-ISSN	14322285
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-12-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Allometry Canopy structure Initial slope Non-rectangular hyperbola Pipe model theory Size dependency Forestry Plant Sciences Agriculture Plant Anatomy/Development Plant Pathology Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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