火炬松不同种源纸浆材材性的变异

1983年火炬松31个种源引种栽培在浙江富阳中国林业科学研究院亚热带林业研究所实验林场,研究表明该批种源间10年生树木生长量和纸浆材材性因子如晚材率、管胞形态特征值(管胞长度、宽度、腔径、壁厚、长宽比、腔径比、壁腔比)、管胞S2层微纤丝角和木材基本密度存在着显著差异,木材主要化学成分中纤维素和木素含量种源间存在着显著差异,而戊聚糖和苯醇浸提物含量种源间差异不显著.这些材性特征除了木材化学性状因子外,均受中等以上程度遗传控制.木材纤维素、木素、戊聚糖和苯醇浸提物含量的广义遗传力分别为0.088、0.003、0.340和0.307,其余性状广义遗传力均大于0.50.引种地栽培环境对木材性状有显著影响.种源原产地纬度与树木生长量、管胞宽度、管胞直径和管胞微纤丝角呈负相关,与晚材率、木材密度呈正相关.31个种源树木胸高直径与管胞长宽比、管胞壁腔比、木材密度呈显著负相关,与管胞宽度、管胞直径、管胞腔径比呈正相关.

Variation in Wood Properties of Different Provenances of Exotic Lobiolly Pine for Pulpwood

Statistically distinct differences in 10-year-old tree growth increments, percent of late wood, tracheid morphological features (tracheid length, tracheid width, tracheid diameter, tracheid double wall thickness, tracheid length-width ratio,tracheid double wall thickness-diameter ratio and tracheid diameter-width ratio), microfibril angle(MFA) in secondary layers of tracheid walls and basic density were found among 31 provenances for exotic Loblolly Pine ( Pinus taeda) grown in Forest Farm of Fuyang County in Zhejiang Province of China. There were no significant differences in cellulose and lignin contents among 10 provenances except pentosan and benzene-alcohol extractives. The wood properties above except chemical composition were genetically controlled in medium or higher level and their broad sense heritability (h2f) were greater than 0.50. The h2f of wood chemical contents were 0.088 in cellulose, 0.003 in lignin, 0.340 in pentosan and 0.307 in extractives. The planting environment had also large significant effects on these wood properties above. The latitude of provenances in indigenous regions was negatively correlated with the trees growth increments, tracheid width, tracheid diameter and MFA, and positively with latewood percentage, basic density. The diameters at the breast height of the trees were notable negatively related to basic density, tracheid length-width ratio, tracheid double wall thickness-diameter ratio and positively to tracbeid width, tracheid diameter and tracheid diameter-width ratio.