tailieunhanh - Báo cáo lâm nghiệp:"The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone" | Ann. For. Sci. 60 2003 673-680 673 INRA EDP Sciences 2004 DOI forest 2003061 Original article The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone Keith M. LITTLEa Johannes VAN STADENb G. Peter Y. CLARKEc a Institute for Commercial Forestry Research PO Box 100281 Scottsville 3209 South Africa b Department of Botany University of Natal South Africa c Agriculture Western Australia South Perth Australia Received 24 June 2002 accepted 7 April 2003 Abstract - When felled at 7 years of age Eucalyptus grandis X camaldulensis trees from three vegetation management treatments manually weeded treatment m row weeding treatment and a weedy control were tested for selected wood and pulping properties in a trial in Zululand South Africa. Weed control significantly improved merchantable volume of the manually weeded 230 m1 3 ha-1 treatment over that of the m row weeding 171 m3 ha-1 or weedy control 138 m3 ha-1 . A significant increase in fibre length density extractable content and active alkali consumption was recorded with increased weed control. As no significant treatment differences were detected for screened pulp yield differences in the pulp yield ha-1 could be attributed to differences in the merchantable volume with a and increase in the pulp yield ha-1 for the manually weeded treatment in comparison to the m row weeding treatment and the weedy control. vegetation management eucalypt wood properties pulping properties Résumé - Relations entre gestion de la végétation et les propriétés du bois et de la pâte d un clone hybride d Eucalyptus. On a testé un certain nombre de propriétés du bois et de la pâte de sujets d un hybride d Eucalyptus grandis X camaldulensis soumis à trois traitements de la végétation concurrente désherbage manuel désherbage de bandes de 1 2 m terrain enherbé abattus à l âge de 7 ans dans un essai situé dans le Zululand en Afrique du Sud. Le contrôle de la .