章古台沙地3种针叶树生长规律对比研究

目的]研究章古台沙地3种针叶树生长规律。方法]通过对章古台沙地樟子松(Pinus sylvestris var.mongolica)、油松(Prnus tabulaeformis)、赤松(Prnus densiflora)3种针叶树的解析木进行分析,比较3种针叶树的生长特点。结果]8~16 a 3种针叶树的胸径和树高生长较快,16 a以后生长逐渐变缓。24 a以后赤松的树高生长比樟子松、油松快,32 a以后胸径生长比樟子松、油松快。樟子松和油松8~24 a时材积连年生长量增长较快,赤松在33~40 a时材积生长明显加快,最高可达0.014 2m3/a。结论]该研究可为掌握针叶树种在沙地上的生长规律提供科学依据。

Comparative Study of the Growth Rhythm of 3 Kinds of Conifer in Zhanggutai Sandy Land

Objective]To study the growth rhythm of 3 kinds of conifer in Zhanggutai sandy land.Method]Through the analysis to the analytic trees of Pinus sylvestris var.mongolica,Pinus tabulaeformis and Pinus densiflora in Zhanggutai sandy land,the growth characteristics of 3 coniferous trees were compared.Result]The results showed that the DBH and tree height of the 3 kinds of conifer grow faster in 8-16 years old,gradually grow slowly after 16 years old.The tree height and DBH of Pinus densiflora grow faster than Pinus sylvestris var.mongolica and Pinus tabulaeformis after 24 years old and 32 years old,respectively.Pinus sylvestris var.mongolica and Pinus tabulaeformis have rapid growth of volume current annual increment in 8-24 years old,the volume of Pinus densiflora significantly grows faster in 33-40 years old,which can up to 0.014 2 m3/a.Conclusion]The study can provide a scientific basis for mastering the growth regularity of conifer in the sandy land.