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首页> 外文期刊>Journal of Wood Chemistry and Technology >Wood Fiber Quality and Kraft Pulping Efficiencies of Trembling Aspen (Populus tremuloides Michx) Clones
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Wood Fiber Quality and Kraft Pulping Efficiencies of Trembling Aspen (Populus tremuloides Michx) Clones

机译：颤抖的白杨（Populus tremuloides Michx）无性系的木纤维质量和牛皮纸制浆效率

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摘要

The natural variation in wood and pulp fiber quality of 15 aspen (Populus tremuloides Michx) clones, represented by 47 trees, was assessed from 4 different sites in British Columbia, Canada. Kraft pulping trials revealed substantial variation in the pulping efficiencies, illustrated by differences of 6% in total pulp yield, ～30% differences in H-factor required to attain a target kappa of 21, and differences of up to 2 ISO brightness units in bleachability of kappa 21 pulp. Clearly, enormous variation exists in the natural stands of aspen, and presents some exciting opportunities for selecting clonal aspen for targeted end-product applications. A comprehensive characterization of wood chemical composition, wood density, and fiber properties indicated that pulp yield is directly related to syringyl lignin monomer composition, and not inherent wood density, regardless of geographic locations, whereas pulp bleachability and viscosity appear to be associated with the inherent cell wall thickness of the starting wood resources (fiber coarseness). These findings suggest that geographic location imparts influences on wood fiber coarseness traits, while substantial genetic variability exists on all sites.
机译：从加拿大不列颠哥伦比亚省的4个不同地点评估了15棵以47棵树为代表的白杨（Populus tremuloides Michx）克隆木材和纸浆纤维质量的自然变化。牛皮纸制浆试验表明，制浆效率存在很大差异，例如，纸浆总产量的差异为6％，目标Kappa值为21时，H因子的差异约为-30％，漂白性的差异最高为2 ISO白度单位卡帕21浆。显然，白杨的天然林分中存在巨大的变化，并为选择用于目标最终产品应用的克隆白杨提供了令人兴奋的机会。木材化学成分，木材密度和纤维性质的全面表征表明，纸浆产量与丁香基木质素单体组成直接相关，而与固有木材密度无关，无论地理位置如何，而纸浆的可漂白性和粘度似乎与固有成分有关。起始木材资源的细胞壁厚度（纤维粗度）。这些发现表明，地理位置对木纤维粗度特征有影响，而所有地点都存在明显的遗传变异。

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