Water Flow Evaluation in Eucalyptus and Corymbia Short Logs

ABSTRACT The aim of this study is to evaluate the free and adsorbed water flow in short logs of Eucalyptus urophylla and Corymbia citriodora clones. 40 cm long, short logs were extracted from the base of the trees. Three trees each of C. citriodora and E. urophylla (A and B clones) were used. 27 logs were debarked and dried to achieve stabilization of mass. Free water (FWFR), adsorbed water (AWFR) and total water (TWFR) flow rates, and basic density were calculated. FWFR was greater than TWFR, which was superior to AWFR. The B clone wood showed a higher FWFR value and a lower AWFR value when compared to the other materials. On the other hand, the A clone wood showed a higher TWFR than the other materials. The TWFR was inversely proportional to density.

摘要 本研究旨在评估尾叶桉（Eucalyptus urophylla）与柠檬伞房桉（Corymbia citriodora）无性系短原木内的自由水与吸附水流动特性。从供试树木基部截取长度为40 cm的短原木，本研究选取柠檬伞房桉与尾叶桉各3株，涵盖A、B两个无性系。对27根短原木实施剥皮处理，并烘干至质量恒定。计算了自由水（Free Water, FWFR）、吸附水（Adsorbed Water, AWFR）及总水分（Total Water, TWFR）的流速，以及基本密度。结果显示，自由水流速高于总水分流速，而总水分流速又高于吸附水流速。相较于其余供试材料，B无性系木材的自由水流速更高、吸附水流速更低；与之相反，A无性系木材的总水分流速高于其余供试材料。总水分流速与基本密度呈反比关系。