人工林杉木管胞形态与基本密度径向变异规律研究  

Radial Variation of Tracheid Morphology and Basic Density of Cunninghamia lanceolata Plantation

作　　者：李超[1] 王哲[1] 郭宇 姚利宏[1] 张俊 LI Chao;WANG Zhe;GUO Yu;YAO Li-hong;ZHANG Jun(College of Material Science and Art Design,Inner Mongolia Agriculture University,Huhhot 010018,China)

机构地区：[1]内蒙古农业大学材料科学与艺术设计学院

出　　处：《林产工业》2019年第12期30-33,共4页China Forest Products Industry

基　　金：国家重点研发计划项目（2017YFD0600202）;内蒙古科技重大项目（CGZH2018135）;内蒙古自治区高等学校青年科技英才支持计划资助（NJYT-20-A15）

摘　　要：对浙江省开化县遗传改良无性系杉木(Cuninghamia lanceolata)“F24x那1-1”的管胞形态特征及径向变异规律进行研究。结果表明:管胞处于幼龄期时,管胞长度、管胞长宽比在髓心附近较小,随着生长轮龄的增加,指标值呈明显的增大趋势,在第13年轮时增至最大值,之后趋于稳定或略有降低;管胞宽度、管胞双壁厚及管胞壁腔比径向变异规律一致,随着生长轮龄的增加,指标值先增至最大值,之后趋于平缓或略有降低,变异幅度较小;杉木基本密度径向变异规律与管胞长度变异规律基本一致,基本密度在第2年最小,为0.283 g/cm3,随着树龄增加,基本密度逐渐增大,第13年时达到最大值,为0.348 g/cm3。研究结论可为木材精准加工利用及遗传改良木材育种提供理论支持。The morphological characteristics and radial variation of tracheid of the"F24x那1-1"of the genetically modified clone of Cunninghamia lanceolata in Kaihua County,Zhejiang Province were studied.The results showed that when the tracheid were in the young age,the length of the tracheid and the length-to-width ratio of the tracheid were smaller in the vicinity of the medulla.As the growth age increased,the index value increased significantly.The annual growth rates increased to the maximum value,and then tended to be stable or slightly decreased;the tracheid width,tracheal double wall thickness and tracheal wall cavity were consistent with the radial variation law.As the growth age increased,the index value increased first.After reaching the maximum value,it tended to be gentle or slightly reduced,and the variation range was small.The radial variation law of the basic density of Chinese fir was basically the same as the variation of the length of the tracheid.The basic density was the smallest in the second year,which was 0.283 g/cm3.As the age of the tree increased,the basic density gradually increased,reaching a maximum value of 0.348 g/cm3 at the 13th year.The study provides theoretical support for the precision processing of wood and genetically improved wood breeding.

关 键 词：无性系杉木 人工林 管胞形态特征 基本密度 径向变异 

分 类 号：TS62[轻工技术与工程]