不同混交模式对杉木初期生长特征的影响

The Effect of Different Mixed Patterns on the Early Growth Characteristics of Chinese Fir

本文以檫木、香樟、枫香、乐昌含笑和火力楠5种速生阔叶树木作为杉木的混交树种,对不同混交模式下杉木的树高、地径、胸径和材积4项生长指标与杉木纯林进行对比与分析,以研究出5种混交树种中效果最佳的树种。结果表明:在经历1~2 a的适应期后,从第3 a开始,不同混交模式下杉木生长量均表现出显著性差异。其中,杉木+枫香混交模式中杉木的地径、胸径和材积生长量显著高于其余四种混交模式以及杉木纯林的生长量,说明枫香对杉木的树体生长具有明显的促进作用,杉木×枫香混交是种间关系较为协调的模式。

This article focuses on Sassafras tzumu、Cinnamomum camphora、Liquidambar formosana、Michelia chapensis、and Michelia macclurell,five fast-growing broad-leaved trees,were used as mixed species of Chinese fir.The height,diameter,diameter at breast height,and volume of Chinese fir under different mixed modes were compared and analyzed with pure Chinese fir forests to identify the most effective species among the five mixed species.The results showed that after an adaptation period of 1-2 years,significant differences in the growth of Chinese fir were observed under different mixed models starting from the 3rd year.Among them,the ground diameter,breast diameter,and volume growth of Chinese fir in the mixed mode of Chinese fir and maple are significantly higher than those in the other four mixed modes and pure Chinese fir forests,indicating that maple has a significant promoting effect on the growth of Chinese fir trees.The mixed mode of Chinese fir and maple is a more coordinated interspecific relationship.