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营造杉檫混交林是进一步扩大檫树栽培面积,两种木材可以兼得的有效途径。混交林木材产量高,其蓄积量可大大超过檫树纯林;在中等立地条件下,也可以超过杉木纯林,但略低于立地条件好、经营集约度高的杉木纯林。其混交效益远远优干杉木和檫树纯林。为此,我们根据多年的研究结果分析了杉檫混交林的混交效益,提出了它的营造技术体系。一、杉檫混交林的混交效益1.能合理利用空间。成功的杉檫混交林的林分结构特征是在整个林分生长周期内,檫树始终居于上层林冠,杉木居于第二层林冠,
Building fir mixed forest is to further expand the tree cultivation area, two kinds of timber can be both an effective way. The mixed forest has high yield of wood and its stock volume can greatly surpass that of the pure stand of Castanopsis sclerophylla. Under the condition of medium site, it can surpass that of the pure Chinese fir plantation but slightly lower than that of the pure Chinese fir plantation with good site condition and intensive management. Its mixed benefits far superior gifted fir and mulberry trees. Therefore, based on the results of many years of research, we analyzed the mixed benefit of mixed Chinese fir plantations and put forward the technical system for its construction. First, the mixed benefits of mixed forest fir 1 can rational use of space. The successful stand structure of the mixed forest of Chinese fir is in the growth period of the whole forest, the tree is always living in the upper canopy tree, fir living in the second layer canopy,