油松人工林的合理结构

Desirable Residual Structure of Pinus tabulae formis Plantation after Thinning

根据对162株19～34年生油松生物量标准木实测资料的分析,表明油松林木的叶量与胸高断面积间存在紧密的线性关系.据此,建立了一个反映林木空间利用效率和生长活力的指标(即干材积生长量与胸高断面积之比),并运用它对油松人工林定位疏伐试区资料进行单木与林分水平的结构分析,进而提出油松人工林疏伐后理想的结构及形成这种结构的合理疏伐方法.

Based on 162 biomass samples of Pinus tabulaeformis plantation,the stronger linear relationship of foliage biomass and basal-area at breast height of individual tree was fourd.On this ground,a measure characterizing growing space efficiency as well as vigor of individual tree was established and applied to the structure analysis which involves the comparison of growth effect among individual trees and the relationship of stand growth with structure in permanent plots of Pinus tabulaeformis plantation.On analysis,the conclusion was put forward that what stand structure should beleft after thinning to achieve maximum growing efficiency and hence the volume growth,and that how this structure can be got following thinning in Pinus tabulaeformis plantation.