Radial and longitudinal density variations in Abies cephalonica and Pinus halepensis  

作　　者：Vasiliki Dimou Anna Tsaliki Kyriaki Kitikidou 

机构地区：[1]Laboratory of Forest Technology,Department of Forestry and Management of the Environment and Natural Resources,Democritus University of Thrace,193 Pandazidou,68200 Orestiada,PC,Greece [2]Laboratory of Forest Biometry-Biostatistics,Department of Forestry and Management of the Environment and Natural Resources,Democritus University of Thrace,193 Pandazidou,68200 Orestiada,PC,Greece

出　　处：《Journal of Forestry Research》2023年第3期853-863,共11页林业研究（英文版）

摘　　要：Basic wood density is an excellent indicator of quality,it is correlated with numerous physical,physiological and mechanical characteristics of a species and is a good descriptor of wood quality and important indicator of tree performance in community ecology.An accurate method is thus needed to estimate wood density.The standard way is to calculate the ratio of the oven-dried mass of a wood sample divided by its green volume,but wood characteristics within and between growth rings are highly variable;the density can vary in the longitudinal and the radial directions.The present study investigates the longitudinal and radial fl uctuations in the basic density of Abies cephalonica Loud and Pinus halepensis Mill.Four logs were cut from four diff erent trees for each species and 16 discs were formed(two discs from each log,one at the base and one at the top).Each disc was cut into cubes where their distance from the pith was measured and then sorted into 2 cm wide concentric zones.The results revealed a mild decreasing trend in basic density from the foot of the trunk upward for both species.The pith in both species also seems to have a relatively high density,which in the immediate next growth rings decreases only to resume increasing toward the bark.

关 键 词：Aleppo pine Physical properties Specifi c gravity Wood quality 

分 类 号：S791.14[农业科学—林木遗传育种] S791.254[农业科学—林学]