杉木近熟林间伐套种闽楠幼林生长状况研究

Study on the Growth Status of Minnan Young Forest by Interplanting Chinese Fir Near Mature Forest

以福建省永安市24年生杉木近熟纯林为研究对象,通过对比杉木间伐后套种闽楠、不间伐套种闽楠及同步营造闽楠纯林3种模式,分析闽楠生长状况。结果表明:杉木遮荫有助于提高闽楠幼树成活率,6年后间伐套种闽楠的保存率最优,且其树高、胸径、材积均显著优于其他处理,包括纯林更新和不间伐套种。研究证实了杉木与闽楠异龄复层混交模式在促进两树种协同生长上的有效性,但随着闽楠密度增加和树龄增长,种间竞争加剧。此发现为杉木纯林改造及大径材与珍稀阔叶树培育提供了创新经营模式。

In Yong'an City,Fujian Province,24 years old Chinese fir near mature forest as the research object,through the comparison of Chinese fir thinning after interplanting,synchronous construction of Minnan pure forest,the growth of Minnan was analyzed.The results showed that the shading of Chinese fir was helpful to improve the survival rate of young trees of Minnan,and the preservation rate of Minnan was the best after 6 years,and its tree height,DBH and volume were significantly better than other treatments,including pure forest renewal and unthinned interplanting.The study confirmed the effectiveness of different age layers of Chinese fir and Minnan in promoting the cooperative growth of the two species,but with the increase of the density and age of Minnan,the interspecific competition intensified.This discovery provides an innovative management model for the transformation of pure Chinese fir forest and the cultivation of large-diameter wood and rare broad-leaved trees.