文献类型：期刊文献

中文题名：落叶松种间及其杂种木材物理力学性质评价

英文题名：Timber Evaluation on Physical and Mechanical Properties of Species and Hybrids of Larix

作者：孙晓梅[1] 楚秀丽[1] 张守攻[1] 刘君良[2]

第一作者：孙晓梅

机构：[1]林木遗传育种国家重点实验室中国林业科学研究院林业研究所;[2]中国林业科学研究院木材工业研究所

年份：2012

卷号：48

期号：12

起止页码：153-159

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：林业公益性行业科研专项(201104027)

语种：中文

中文关键词：落叶松;种;杂种;物理力学性质;综合评价

外文关键词：Larix spp.; species; hybrid; physical and mechanical properties; comprehensive evaluation

分类号：S781

摘要：落叶松（Larix spp.）是我国东北、西北、华北及南方亚高山区重要速生用材树种。据第七次全国森林资源清查数据,我国现有落叶松总面积1063万hm^2,其中人工林约286万hm^2,占全国人工林总面积的7.14%（贾治邦,2009）。由此可见,落叶松不仅天然林资源丰富,人工林后备资源也十分雄厚,具有很大的开发利用前景。但落叶松产区主要位于经济欠发达的边远山区或国有林区,
The physical and mechanical properties of wood were analyzed for 4 Larix species（Larix kaempferi,L.gmelinii,L.olgensis,and L.principis-rupprechtii） and 3 hybrids（L.kaempferi×L.gmelinii,L.kaempferi×L.principis-rupprechtii,and L.kaempferi×L.olgensis）,and the differences were evaluated comprehensively using the membership function based on Fuzzy mathematics.The results showed that the timber of Larix spp.had significant heartwood ratio and great air-dried density as 0.634 g·cm-3 in average.The dry shrinkage of the wood was relatively high with average radial and tangential shrinkage as 4.52% and 8.93%,respectively.However,the wettability of the wood was poor,showing the average contact angle in radial and tangential directions as 57.70° and 59.14°,respectively,which indicated the favorable natural decay resistance to water.The timber also showed fine mechanical properties with average modulus of elasticity（MOE）,modulus of rapture（MOR）,tensile strength parallel to grain,crushing strength,and cleavage strength as 15.36 GPa,120.07 MPa,134.25 MPa,46.30 kJ·m^-2,and 9.93 N·mm^-1,respectively.Significant differences were found among species or hybrids in the properties of tree height,heartwood width,average ring width,wood radial contact angle,dry shrinkage,radial air-dried shrinkage,tangential-to-radial dry shrinkage ratio,MOE,and MOR.Generally,the 3 hybrids showed great improvement in growth and timber properties when compared with the male parents.As a result,the comprehensive evaluation based on the properties above indicated that the female parent of L.kaempferi and the 3 hybrids were more suitable to be selected as structural or non-structural timber tree species than the 3 native male parents.