Login | Request Account (DAF staff only)

Effect of reduced rotation length on Araucaria wood quality.

Harding, K. (2005) Effect of reduced rotation length on Araucaria wood quality. Project Report. Forest and Wood Products Research Development Corporation.

[img]
Preview
PDF
215kB

Publisher URL: http://www.fwpa.com.au

Abstract

The review of existing information has identified the following:

- the juvenile core in Araucaria is probably contained within the first 15 growth rings in the pith, with spiral grain being a chief determinant of its extent within the stem;
- a reduction in rotation length for a given site index will reduce ASV and mature wood volume, with an increase in the proportion of juvenile wood;
- for a given rotation length, lower ASV stems were estimated to contain a lower proportion of juvenile wood (based on the assumptions made and crude simulations using WEEDS, PL YSIM and STEPS software); regardless of juvenile wood proportions, smaller stems will yield a higher proportion of pith-in material;
- an increase in the proportion of juvenile wood, due to a reduction in rotation length, could affect wood quality due to an increase in the proportion of the recovery containing high spiral grain, shorter tracheids and higher micellar angle;
- high spiral grain and high micellar angles adversely impact on wood quality through their influence on twist and longitudinal shrinkage, respectively;
- positive outcomes from a reduction in rotation length might include an increase in the proportion of live knots in upper stem sections and a reduction in the extent of brown-stain heartwood;
- the uniformity in basic density within Araucaria stems means reduced rotation lengths and lower stem ASVs are unlikely to have a major impact on this wood property, and
- the effect of a reduction in rotation length on the incidence of compression wood and timber susceptible to kiln staining could not be established from the available information.

Item Type:Monograph (Project Report)
Corporate Creators:Forest and Wood Products Australia, Department of Employment, Economic Development and Innovation (DEEDI)
Projects:FWPA. PN01.1901
Business groups:Horticulture and Forestry Science
Additional Information:Reproduced with permission. © 2010 Forest and Wood Products Australia.
Keywords:Final report, Araucaria, plantation, rotation length, wood quality, logs, thinning age, tropical softwood.
Subjects:Forestry
Live Archive:03 Apr 2012 02:21
Last Modified:03 Sep 2021 16:44

Repository Staff Only: item control page

Downloads

Downloads per month over past year

View more statistics