不同强度人为干扰对马尾松林分结构及物种多样性的影响

Effects of Different Strength of Man-made Disturbs on Pinus massoniana Stand Structure and Species Diversity

分析了不同强度人为干扰条件下马尾松林分结构特征及其物种多样性的差异。结果表明:随着人为干扰强度的减轻,马尾松林分的高度级及径级结构趋于完整,但由于轻度干扰林分郁闭度大、林内透光率较小而使得林下更新受到阻碍,应予以单株间伐利用;物种多样性的各测定指标也随着干扰强度的下降而增加,减少外界破坏因素有利于物种多样性的恢复,当封育林分达到郁闭时,可进行合理的保护性利用。

The results showed that Pinus massoniana stand height and breast diameter level structure tended to the perfect with the decrease of man-made disturb strength, the single-tree thinning utilization should be adopted because that the stand shade density, and photic ratio inside forest was relatively low with slight disturb, different species biodiversity determination indexes increased with decrease of disturb strength, decreasing the damage factors from outside did help to the species biodiversity recovery, the rational protective utilization might be conducted when the stand reached crown closure.