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系统研究了来自浙江临海黑杨派南方型新无性系试验林 2 0个无性系的纸浆材主要木材性状。结果表明 :黑杨派新无性系树干的纤维长度自上而下逐渐增长 ,树冠上部枝条的纤维较中、下部枝条为短 ;树干木材的基本体积质量则以下部的为高 ,上部稍大于中部 ;树枝条的基本体积质量 ,以树冠下部的为最小 ,自下而上增大。不同树干部位木材纤维的长短频率分布均匀且遵从正态分布。树干纤维长度均值差异主要表现在组中值 0 7mm以下和 1 3mm以上的纤维数量上的差异。 2 0个无性系树干各部位纤维长度为 0 940 0～ 1 0 0 59mm ,均达到国际木材学会规定的中级纤维标准 ,基本体积质量为 0 3333～ 0 3467g·cm- 3;树枝条的纤维长度为 0 6861～ 0 72 52mm ,基本体积质量为 0 3588～ 0 3688g·cm- 3。由此 ,对新无性系作为纸浆纤维材培育与利用提出了建设性意见。表 4参 9
The main wood traits of 20 pulp clones from the clonal Poplar Linnan clonal plantation in Zhejiang Linhai were studied systematically. The results showed that the fiber length of trunk of black clonal young clones increased gradually from top to bottom, the fibers in the branches above the crown were shorter than those in middle and lower branches, while the basic volume of trunk wood was higher in the lower part and slightly larger in the upper part The basic volumetric mass of the branches is the smallest in the lower part of the canopy, increasing from bottom to top. The lengths and frequencies of wood fibers in different trunk areas are evenly distributed and follow the normal distribution. The differences in the mean value of trunk fiber length were mainly found in the differences in the number of fibers below 0 7 mm and above 13 mm. The fiber length of each part of 20 clones was 0 940 0 ~ 1 0 0 59mm, both of which reached the intermediate fiber standard stipulated by the International Society of Timber Science and the basic volume was 0 3333 ~ 0 3467g · cm-3. The fiber length 0 6861 ~ 0 72 52mm, the basic volume of mass is 0 3588 ~ 0 3688g · cm-3. As a result, the new clones as pulp fiber material cultivation and utilization of constructive suggestions. Table 4 Participation 9