不同强度人为干扰对马尾松生长的影响

不同强度人为干扰15a后,经解析木分析表明,轻度干扰林分中马尾松的胸径、树高、材积均保持良好的生长趋势,总生长量比中度干扰和重度干扰林分高,连年生长量和平均生长量在幼龄期也高于后二者,重度干扰林分的各要素生长量均增长缓慢。这些结果表明超过一定限度的人为干扰阻碍了林木的生长发育。

The Effects of Human-Caused Disturbances on the Growth Course of Pinus Massiniana' Natural Forest

Disturbed by human being after 15 years.stem analysis method of standard trees showed the growth of breast diameter,height and volume of Pinus Massiniana maintained good trend.Its total increment in all growth period.current annual increment and periodic annual increment in young period were higher than that of slight and moderate disturbance.The increment of three factors increased slowly in slight disturbance forest.These results indicated that the trees′ growth and development were hindered by the human-caused disturbance that was beyond some appropriate limitation.