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The present study examined the effect of alkali extraction on pit membranes(PMs)and liquid uptake of four conifers.After alkali extraction,the deposits around the PMs almost dissolved in Cunninghamia lanceolata Hook.and Cryptomeria japonica D. Don wood which showed good liquid uptake.In contrast,in Larix leptolepis Gordon and Pseudotsuga menziesii Franco,although the tori adhered strongly to the pit aperture preventing liquid transportation,the liquid uptake of the woods improved markedly.Moreover,the combined treatment of alkali extraction-transverse compression had no synergistic effect in improving liquid uptake.These results demonstrate that alkali extraction is effective in improving the liquid uptake of wood.
The present study examined the effect of alkali extraction on pit membranes (PMs) and liquid uptake of four conifers. After alkali extraction, the deposits around the PMs almost dissolved in Cunninghamia lanceolata Hook. And Cryptomeria japonica D. Don wood which showed good liquid uptake In contrast, in Larix leptolepis Gordon and Pseudotsuga menziesii Franco, although the tori adhered strongly to the pit aperture prevented liquid transportation, the liquid uptake of the woods improved markedly. Moreover, the combined treatment of alkali extraction-transverse compression had no synergistic effect in improving liquid uptake.These results demonstrate that alkali extraction is effective in improving the liquid uptake of wood.