Small-tree volume equations for subtropical hardwood plantation species

B. W Hogg; T Lewis; J. R Huth; D. J Lee

doi:10.1080/00049158.2021.1961417

Small-tree volume equations for subtropical hardwood plantation species

B. W Hogg, T Lewis, J. R Huth D. J Lee

Australian Forestry, Vol.84(3), pp.152-158

2021

: https://doi.org/10.1080/00049158.2021.1961417

(1)

url

https://doi.org/10.1080/00049158.2021.1961417

Published Version

combined variable equation

comprehensive combined variable equation

forest inventory

model performance

regression

Schumacher and Hall equation

Estimation of stem volume is needed to determine timber yield and forest carbon, but equations to estimate volume from easily assessed inventory measures are lacking for hardwood plantation species in the subtropics. We assessed the merits of three volume equations that combine measurements of tree diameter at breast height (DBH) and total tree height for five hardwood plantation taxa (Corymbia citriodora subsp. variegata, Corymbia hybrids, Eucalyptus cloeziana, E. longirostrata and E. dunnii). Goodness-of-fit statistics indicated that model 1 (comprehensive combined variable equation) and model 2 (the Schumacher and Hall equation) fitted the data well (e.g. adjusted R2 > 98). Analysis of bias in different diameter classes indicated that these models did not show any systematic bias patterns with tree size. Model 3 (combined variable volume equation) is the least desirable as it showed evidence of overestimation of volume for larger trees in some taxa. Models 1 and 2 provide a useful initial set of volume equations for five potentially important hardwood plantation species in subtropical Queensland. These equations are based on stems with a DBH range of 5−30 cm and hence there is a need to collect data for larger stems (>30 cm DBH) as existing plantations mature.

: Small-tree volume equations for subtropical hardwood plantation species
: B. W Hogg (Author) - Department of Primary Industries
T Lewis (Author) - Department of Primary Industries
J. R Huth (Author) - Forestry and Biosciences RD&E
D. J Lee (Author) - University of the Sunshine Coast, Queensland, Tropical Forests and People Research Centre
: Australian Forestry, Vol.84(3), pp.152-158
: Taylor & Francis Australasia
: 2021
: 10.1080/00049158.2021.1961417
: 2325-6087
: Tropical Forests and People Research Centre; University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
: English
: 99583608702621
: Journal article

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esploro.research.conf.research.portal.label.prefix.inciteWOSResearchAreas: Forestry

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