e-journal

Stand variation in Pinus radiata and its relationship with allometric scaling and critical buckling height

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† Background and Aims:
Allometric relationships and the determination of critical buckling heights have been examined for Pinus radiata in the past. However, how they relate to more mature Pinus radiata exhibiting a wide range of stem diameters, slenderness and modulus of elasticity (E) at operationally used stand densities is largely unknown. The aim of this study was to examine the relationship between Pinus radiata stand structure
variables and allometric scaling and critical buckling height.

† Methods:
Utilizing a Pinus radiata Nelder trial with stand density and genetic breed as variables, critical buckling
height was calculated whilst reduced major axis regression was used to determine scaling exponents between
critical height (Hcrit), actual height (H), ground line diameter (D), slenderness (S), density-specific stiffness (E/r) and modulus of elasticity (E).

† Key Results:
Critical buckling height was highly responsive to decreasing diameter and increasing slenderness. Safety factors in this study were typically considerably lower than previously reported margins in other species.
As density-specific stiffness scaled negatively with diameter, the exponent of 0.55 between critical height and diameter did not meet the assumed value of 0.67 under constant density-specific stiffness. E scaled positively with stem slenderness to the power of 0.78.

†Conclusions:
The findings suggest that within species density-specific stiffness variation may influence critical
height and the scaling exponent between critical height and diameter, which is considered so important in
assumptions regarding allometric relationships.

Key words: Allometric scaling, critical buckling height, Euler buckling, modulus of elasticity, Nelder, Pinus
radiata, safety factor, stem slenderness.

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Ketersediaan

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Informasi Detail

Judul Seri

Annals of Botany

No. Panggil

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Penerbit

Oxford : Oxford University Press on behalf of the Annals of Botany Company., 2013

Deskripsi Fisik

Annals of Botany 111: 675–680, 2013

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

PEMULIAAN TANAMAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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