Effects of pre-harvest girdling on selected properties of red pine, red maple and Eastern larch
A Taylor, P A Cooper
Trees of three species - tamarack (Larix laricina), soft maple (Acer rubrum) and red pine (Pinus resinosa) - were girdled immediately below the crown,one to two years before felling. The wood from these trees was compared with wood taken from un-girdled control trees felled at the same. Sapwood and heartwood, from the controls, and from above and below the girdle of treated trees, were examined for parenchyma viability, moisture content and various extractive components. The susceptibility of the wood to sap-stain and mould fungi, non-microbial staining and decay fungi was compared, as well as the wood's CCA treating characteristics. Results indicate that girdling changes the physical and chemical state of the wood and influences its susceptibility to sap-stain and mould fungi.
Keywords: TAMARACK; LARIX LARICINA; ACER RUBRUM; PINUS RESINOSA; GIRDLING; CCA FIXATION; NUTRIENTS; NON-MICROBIAL STAIN; SAP STAIN; DECAY RESISTANCE