马尾松纸浆材优良家系的选择

对福建三明和仙游两个试验点9年生的马尾松自由授粉子代试验林进行调查研究，结果表明：不同家系在树高、胸径、材积生长性状上存在极显差异，这些差异主要是由遗传因素制约；在木材基本密度、木材化学组分、木材纤维形态上也存在较大的差异。以单株纤维素产量为主要指标，从参试的105个家系中各选出10个纸浆材优良家系。从三明点选出W00249、W00251等10个纸浆材优良家系，其平均单株纤维素产量达10.718kg，树高、胸径、材积的平均值分别为9.55m、12.4cm和0.05848^3,分别大于福建省马尾松速生丰产林标准的50.39%、93.75%和173．91％；从仙游点选出W00307、W00335等10个纸浆材优良家系，其平均单株纤维素产量为8．240kg，树高、胸径、材积的平均值分别为7.34m、11.4cm和0.04172m^3，分别大于福建省马尾松速生丰产林标准的52.92%、132.65%和210.65%，增产效果极为显。

A Study on Selection of Excellent Pulpwood Families of Masson Pine

The analysis of variance was adopted to study the genetic variation of 9 year old open pollinated progenies of masson pine at Fujian Sanming and Fujian Xianyou.The results showed that there were very significant differences among families in growth traits such as height,DBH and stem volume and the variations were mainly controlled by genetic factors.There were some differences among families in wood basic density,wood chemical compositions and wood fiber traits.According to the production of cellulose in individual,10 excellent pulpwood families were selected among 105 families at Fujian Sanming and Fujian Xianyou respectively.The average of the production of cellulose in individual of 10 excellent pulpwood families including W00249 and W00251 in Sanming reached 10.718 kg and the average of their height,DBH and stem volume were 9.55 m?12.4 cm and 0.058 48 m 3 respectively which were 50.39%?93.75% and 173.91% more than the standard of fast growing and high yielding of masson pine in Fujian province.The average of the production of cellulose in individual of 10 excellent pulpwood families including W00307 and W00335 in Xianyou reached 8.240 kg and the average of their height,DBH and stem volume were 7.34 m?11.4 cm and 0.041 72 m 3 respectively which were 52.92% ?132.65% and 210.65% more than the standard of fast growing and high yielding of masson pine in Fujian province.These selected families were very striking in production.