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本文报道了湿地松纸浆林管胞长度和长宽比、基本密度和化学成分的变异规律。管胞长度、长宽比、基本密度和纤维素含量径向由髓心向外都呈递增、稳定的模式,8—10年后趋于稳定;木素、多缩戊糖含量在径向上表现出递减、稳定的模式,10—12年后趋于稳定。树干纵向,管胞长度、长宽比由基部向上先增加而后递减,木材基本密度则呈递减的模式。湿地松木材幼龄期为10年左右,其幼龄材管胞长度短、长宽比小,基本密度小,纤维素含量较低,木素及多缩戊糖含量高。基于湿地松木材管胞形态、基本密度和化学成分含量等纸浆材原料工艺技术指标要求,确定湿地松纸浆林最低主伐林龄12年左右。
In this paper, the variations of tracheid-plume tracheid length, aspect ratio, basal density and chemical composition were reported. Tracheid length, aspect ratio, basal density and cellulose content were increased radially from the medullary center outward, stable mode, stabilized after 8-10 years; lignin, poly-pentose content in the radial Decreased, stable mode, 10-12 years after the trend stabilized. Trunk length, tracheid length, aspect ratio increased first and then decreased from the base upward, the basic wood density was decreasing mode. Siberian pine wood has a young age of about 10 years, and its young tracheid length is short, the aspect ratio is small, the basic density is small, the content of cellulose is low, and the content of lignin and pentasodium is high. Based on the technical requirements of raw materials for pulpwood such as tracheids morphology, basic density and chemical composition, the minimum primary cutting age of Pinus elliottii pulpwood was determined to be about 12 years.