Abstract

New Zealand-grown poplar hybrid (Populus X euramericana) samples were subjected to two different treatment processes: full-cell and alternating pressure methods(APM) . In the full-cell process, the samples were treated at different moisture content levels: 30, 50 and 70. In the APM process, there were 15 cycles and the initial moisture content of samples was 70. In the full-cell process, there was no advantage in reducing the sample moisture level from 50 to 30. While the APM process resulted in poor uptake, the preservative penetration was patchy in all the treatment