15年和22年马尾松纸浆材优良家系选择

摘要

Based on the production of cellulose and the production of dry wood for excellent families in 15 and 22 years old, the heritability was evaluated and the excellent pulpwood family was selected in Masson pine. The results showed that:there were very significant differences in indexes of tree height, DBH and stem volume among families in 15 and 22 years old, but the heritability of that in 15 years old were significantly higher than in 22 years old;the selection of the volume was satisfactory to improve the wood quality, but the improvements of the basic density and the cellulose content had little effect;the family of Gui GC443A performed well in the growth and the wood property, and can be planted as an excellent pulpwood family in large scales;we integrated with two factors of fiber yield and quality, and found the reasonable harvesting period of pulpwood was in 15 years old.%以15 a和22 a的木材干物质产量与木材纤维素产量为选择指标，进行马尾松遗传力估算和纸浆材优良家系选择。结果表明：15 a和22 a的树高、胸径和材积家系间差异极显著，三者15 a时的遗传力均明显高于22 a；以材积选择为主改良木材品质效果理想，而基本密度和纤维素含量的改良效果甚微；以单位面积木材产量为选择指标，15 a和22 a两个年度均入选的优良家系5个，以纤维产量为选择指标，两个年度均入选的优良家系3个，其中，桂GC443A在两个选择指标和两个年度均表现突出，可作为纸浆材优良家系大面积推广。