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Stem and merchantable volume equations for hybrid aspen growing on farmland in Sweden

Johansson, Tord (2014). Stem and merchantable volume equations for hybrid aspen growing on farmland in Sweden. Uppsala: (NL, NJ) > Dept. of Energy and Technology, Sveriges lantbruksuniversitet. Rapport / Institutionen för energi och teknik, SLU ; 075
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Abstract

In this study, stem volume models for hybrid aspen were developed. The study was based on 29 stands located in middle and southern Sweden (latitudes 55 – 60° N.). The mean total age of the hybrid aspen was 22 years (range 15 – 50 years) with a mean stand density of 1006 stems ha-1 (90 – 2402) and a mean diameter at breast height (over bark) of 19.7 cm (8.5 – 40.8 cm). A number of equations were assessed for modeling stem volume. Standing volume was examined in relation to soil type. Multiple samples were collected for three types of soils: sediments of light clay and medium clay and till soils. A power equation, V = β0Dβ1Hβ2, fits the data best. This model explained 99% of the observed variation in prediction of observed data and exhibited no apparent bias across the range of predicted stem volumes. Merchantable volume equations for the estimation of commercial volume for any top diameters and bole length were developed. They explained 99% of the observed variation in prediction of observed data. Soil types in the stands were light and medium clays and tills. The standing volume was calculated, the mean was 301±167 (range 111-701) m3 ha-1. Mean annual increment was also calculated, the mean was 14.6±8.0 (range 2.8-36.9 m3 ha-1 year-1. There were no significant differences between the soil types and MAI.

Authors/Creators:Johansson, Tord
Title:Stem and merchantable volume equations for hybrid aspen growing on farmland in Sweden
Series/Journal:Rapport / Institutionen för energi och teknik, SLU (1654-9406)
Year of publishing :2014
Number:075
Number of Pages:26
Place of Publication:Uppsala
Publisher:Institutionen för energi och teknik, Sveriges lantbruksuniversitet
ISSN:1654-9406
Language:English
Publication Type:Report
Article category:Other scientific
Full Text Status:Public
Agris subject categories.:F Plant production > F62 Plant physiology - Growth and development
K Forestry > K10 Forestry production
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:populus tremula, populus tremuloides, hybrids, farmland, stems, forest mensuration, growth, sweden
Keywords:farmland, hybrid aspen, MAI, merchantable volume, soil type, stands, stem volume, total age
URN:NBN:urn:nbn:se:slu:epsilon-e-2238
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2238
ID Code:11670
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:25 Nov 2014 12:00
Metadata Last Modified:08 Sep 2017 09:23

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