不同树龄和起源构树纤维形态分析  

Fiber Morphology Analysis of Broussonetia papyrifera with Different Age Groups and Origins

作　　者：谢钊俊 夏玉芳[1] 张克丽[1] 杨怡之[1] 

机构地区：[1]贵州大学林学院,贵州贵阳550025

出　　处：《西部林业科学》2015年第6期110-114,共5页Journal of West China Forestry Science

基　　金：贵州省科学技术省校合作项目(黔科合[2012]7001)

摘　　要：对1—3龄的实生和萌生构树木质部纤维及韧皮纤维形态进行测定。结果表明，（1）构树木质部纤维长度在不同年龄间存在筹异，2、3龄较1龄长，3个年龄木质部纤维长度都主要集中在400～600 μm；宽度相近；长宽比3龄较大；长度、宽度在不同起源间无显著差异。（2）构树韧皮纤维形态在不同年龄和不同起源间均存在变异。2、3龄韧皮纤维长度显著长于1龄，1龄主要分布在3 460～6 460 μm，2、3龄主要分布于3 640～9 460μm；长宽比2龄较大。不酬起源间，构树韧皮纤维长度、宽度实生显著大于萌生；长宽比实生较大。可考虑以2年为经营周期经营构树纤维用材林，将2年实生构树截干，收获地上部分利用，待其萌发新枝生长2年后，再次收获利用。The fiber morphology of xylem and phloem from seed propagation and cutting culture of Broussonetia pa-pyrifera with age of 1-3 years were measured, and the results showed that： 1 ） The xylem fiber length is differentin different age groups, and the length of 2 a and 3 a are longer than that of a, the length of these 3 age groupsare mainly 400 - 600 μm ; the length-width ratio of 3 a is the highest among these 3 age groups ; in terms of differ-ent origins, there is no obvious difference in fiber length and width. （2） There are significant variation in differentage groups and origins of phloem fiber. The fiber length of 2 a and 3 a are longer than that of 1 a, the length ofl aare mainly 3 460 - 6 460 μm, and that of 2 a and 3 a are mainly 3 640 - 9 460 μm ; the length-width ratio of 2 ais the highest among these 3 age groups. In different origins, the phloem fiber length and width of seed propaga-tion are significantly larger than that of cutting culture and the length-width ratio of seed propagation is higher thatof cutting culture. This study shows that the 2-year period is best cycle for managing Broussonetia papyrifera fiberforest. It is feasible to harvest aboveground parts after cutting the stem of 2 a seed propagation, and harvest againafter another 2-year growth.

关 键 词：构树 木质部纤维 韧皮纤维 实生、萌生 

分 类 号：S718.4[农业科学—林学]