Chemical and Kraft Pulping Properties of Young Eucalypt Trees Affected by Physiological Disorders

This study evaluated how Eucalyptus physiological disorder (EPD) affects wood quality and pulping performance. Although research advances have been made in forest management tree improvement programs for eucalypt plantations, some areas of Brazil are still subject to abiotic stress, mainly due atypical climatic patterns. Tree growth is affected by this can change the properties, which influence process. The trees used were three-and-a-half-year-old hybrid clones. In order evaluate impact on wood, selected with higher lower levels symptoms caused EPD. First, density, chemical composition, variables process each these woods compared. EPD resulted poorer pulping. To reduce negative process, reference woodchip samples from industrial mixed again. results show that negatively required pulp production when stress conditions formed more extractives (60% greater) 9% lignin content. Thus, amount reagent was increased yield decreased. One solution minimize problem combine woodchips stands (20%) non-EPD-affected chips (80%). it appears requires special attention context production.