Experimental Design of Silviculture Targeting for Large Diameter Timbers Guided by Forest Vertical Structure

doi:10.13466/j.cnki.lyzygl.2019.05.015

Abstract

Abstract:

The harvest of forest management is mainly in large-diameter trees.How to rationally and effectively adjust the structure of forest management stand to form a high productivity stand and take into account the economic and ecological benefits of high-quality target trees is an urgent problem to be solved.Based on the sample plot data of broad-leaved Korean pine forest in Jiaohe,Jilin province,this paper analyzed the vertical structure characteristics of forest,discussed the framework of forest development types,the design mechanism of operation method and the technical elements including full-cycle management,and proposed a design case of Korean pine-large-diameter timber operation method guided by the vertical structure of forest,in order to provide a realistic way for the cultivation of large-diameter timber of broad-leaved Korean pine forest and for forest management.This demencfration provided a model reference for the design of forest management practices.

Key words: vertical structure, large diameter timber, silvicultural systems, experiment design, broad-leaved Korean pine forest

CLC Number:

S757

JIANG Jun, CHEN Beibei, ZHAO Xiuhai, PANG Lifeng. Experimental Design of Silviculture Targeting for Large Diameter Timbers Guided by Forest Vertical Structure[J]. FOREST RESOURCES WANAGEMENT, 2019, 0(5): 89-94.

Figures/Tables 4

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树种	株数/株	平均胸径/cm	平均树高/m	相对优势度/%
紫椴	2765	24.5	17.3	12.19
胡桃楸	213	28.4	18.7	10.6
色木槭	9604	14.4	12.3	17.88
红松	2546	21.8	15.9	12.86
水曲柳	2155	28.7	18.4	11.75
千金榆	1900	8.5	7.5	8.73
其他树种	35469	17.5	11.5	—
全部树种	54652	—	13.2	—

林分层次	胸径/cm	胸高断面积/(m²/hm²)	占总胸高断面积比例/%	单株平均材积/m³	不同径级下的树种个体数比例/%
林分层次	胸径/cm	胸高断面积/(m²/hm²)	占总胸高断面积比例/%	单株平均材积/m³	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
更新层	4.8±0.3a	0.23	0.22	0.012±0.003a	2.8	0.05	—	—	—
下林层	7.1±0.04b	1.89	1.22	0.024±0.0001a	28.8	6.9	0.2	—	—
中林层	15.3±0.11c	55.71	56.41	0.179±0.003b	14.8	32.1	7.7	0.7	0.09
上林层	26.1±0.18c	34.17	33.11	0.359±0.012c	0.3	5.6	6.8	1.7	0.8

样地	2010年作业前林分密度/(株/hm²)	2015作业后年林分密度/(株/hm²)	胸径年生长量/(cm/a)	断面积年平均生长量/(cm²/a)	材积年生长量/(m³/a)
作业样地	1076.5	953.6	0.7a	8.12a	0.0291±0.02262a
对照样地	1349.6	1174.6	0.5b	6.31b	0.0184±0.0149b