文献类型：期刊文献

英文题名：Effect of different positions of bordered pit torus in yezo spruce on its permeability

作者：Bao, FC[] Lu, JX[] Zhao, YK[]

第一作者：Bao, FC

通信作者：Bao, FC[1]

机构：[1]Chinese Acad Forestry, Inst Wood Ind, Beijing 100091, Peoples R China

年份：2001

卷号：43

期号：2

起止页码：119-126

外文期刊名：ACTA BOTANICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000167217900002)】；

语种：英文

外文关键词：yezo spruce; bordered pit torus; pit aspiration; pit deaspiration; wood permeability

摘要：The green wood of yezo species ( Picea jezoensis var. komarovii (V. Vassil.) Cheng et L. K. Fu) was treated with air drying and ethanol exchange drying and by soaking the air-dried wood in water followed by ethanol change drying. The results showed that the proportion of aspirated pits in the respective earlywood and latewood of the air-dried sapwood was increased to 99% and 81%, while that of heartwood was also as high as 97% and 86% because most of the bordered pits were aspirated at its green state. The permeability of air-dried sapwood and heartwood was as low as 0.114 and 0.045 darcy respectively. The proportion of aspirated pits in the earlywood and latewood of sapwood after ethanol exchange drying was very low (8% and 17% respectively), whereas that of heartwood was very high (97% and 86% respectively) since most of the pits in it were aspirated at its green state, so the ethanol exchange drying failed to prevent pit aspiration. The permeability of sapwood and heartwood after ethanol exchange drying was 11.713 and 0.074 darcy respectively, which was increased 101.5 times and 62.0% over the permeability at air-dried state. t test showed that the difference of permeability of ethanol exchange drying versus air drying for sapwood was very significant at the level of 0.1%, but was not significant for heartwood. The proportion of aspirated pits in earlywood and latewood of air-dried sapwood and heartwood after soaking in water followed by ethanol exchange drying was decreased by 18% and 22%, and 0 and 17%, respectively, while the permeability of sapwood and heartwood was 0.439 and 0.060 darcy respectively, which was increased by 85% and 49% respectively. The permeability difference of soaking sapwood and heartwood versus their controls was very significant at the 0.1% level by t test.