马尾松林冠下套种细柄阿丁枫生长效果研究

[目的]探讨马尾松纯林改造技术。[方法]采用成对对比设计,研究马尾松林冠下套种细柄阿丁枫的生长效果。[结果]混交林马尾松的平均胸径、平均树高、单株平均蓄积量、单株平均冠幅依次为26.05 cm、19.12 m、0.444 7 m3、6.49 m,分别是纯林的130.4%、111.6%、180.5%、119.1%。10年生细柄阿丁枫的平均胸径、平均树高、单株平均蓄积量、单株平均冠幅分别为6.86 cm、6.57 m、0.013 3m3、2.73 m。混交林林分蓄积是纯林的96.8%,但马尾松已到成熟期,细柄阿丁枫将进入速生期,混交林的林分蓄积将超过纯林。[结论]马尾松林冠下套种细柄阿丁枫改善了林分结构,种间关系协调,使马尾松纯林变成了针阔混交林。

Study on the Growth Effect of Interplanting Altingia gracilipes under the Forest Canopy of Pinus massoniana Lamb.

[Objective] The aim of the research was to discuss the transformation technology of pure Pinus massoniana Lamb.[Method] Using contrast design in pairs,the growth effects of interplanting Altingia gracilipes under the forest canopy of P.massoniana were studied.[Result] The average diameter at breast height,the average tree height,the average growing stock per plant and the average crown width per plant of the mixed forest of P.massoniana were 26.05 cm,19.12 m,0.444 7 m3 and 6.49 m turn,being 130.4%,111.6%,180.5% and 119.1% of the pure forest.The average diameter at breast height,the average tree height,the growing stock per plant and the average crown width per plant of 10-year-old A.gracilipes were 6.86 cm,6.57 m,0.013 3 m3 and 2.73 m resp.The stand volume of the mixed forest was 96.8% of pure forest.But when P.massoniana entered the mature period,A.gracilipes was entering the fast-growing period and the stand volume of the mixed forest would exceed that of pure forest.[Conclusion] Interplating A.gracilipes under the forest canopy of P.massoniana improved the stand structure with harmonious interspecific relationship and made pure forest of P.massoniana turn into the needle-leaf and broad-leaf mixed forest.