江西马尾松纸浆材种源选择

PROVENANCE SELECTION FOR PULPWOOD OF MASSON PINE IN JIANGXI PROVINCE

在江西吉安武功山林场９ａ生马尾松种源试验林中采集９个代表性种源试样，测试２８项木材构造、物理和化学性状，进行种源间比较选择，结果是：①经方差分析，各性状种源间差异远大于个体间差异；②主要造纸经济性状（管胞长度、晚材率、双壁厚、壁腔比和综纤维素含量等）遗传力估值均大于０．７，受强度的遗传控制；③材性与生长性状间相关分析表明，在江西马尾松速生地区作高径性状的正向选择会导致种源或个体的管胞宽度、腔径和差异干缩增大，晚材率、壁腔比和径向干缩下降，为间接选择提供依据；④取与造纸性能关系紧密的１１项木材性状，综合选择广东高州、广西宁明、贵州德江和江西吉安等优良种源。

Thesamples of nine provenances were collectdfrom nine-year-old trial stands of massonpine located in Wugongshan Forest Farm of Ji’an Prefecture to analyse 24 wood traits includ-ing timber structure,physical properties and chemical components. The results are as follows:Ⅰ,The variance analyses among and within provenances showed that differences betweenprovenances outweighted those between individuals within provenances.Ⅱ,Main economictraits such as fibre length,the rate of summerwood,dipwall thickness,the rate of dipwallthickness to Iumen diameter,and total cellulose contents etc.,were controlled by strongheredity effects,since these traits’s hereditary values were all over 0.7.Ⅲ,Correlative analy-ses between wood properties and growth traits suggested that positive selection of height andDH growth in fast growing regions of Jiangxi Province tended to increase fibre width,Iumendiameter and difference air-shrinkage,or decrease the rate of summerwood,the rate of dipwallthickness to Iumen diameter and radial air-shrinkage of provenances or individuals, which pro-vided the basis for indirect selection of timber properties.Ⅳ,On selection by 11 timber traitsin close relation to pulp characters,such fine provenences as Guangdong’s Gaozhou,Guangxi’sNingming, Guizhou’s Dejiang and Jiangxi’sJi’an were selected for Jiangxi province’s centralregions.