三倍体毛白杨超短轮伐纸浆林产量及其纤维形态分析

Timber Yields and Fiber Morphology of Intensive Short-Rotation Pulpwood Plantations for Triploid Hybrids of Populus tomentosa

以三倍体毛白杨硬枝容器扦插苗为种植材料,以9990,6660,4995,4440,3330,2490株.hm-2为造林密度在山东兖州建立试验林,在研究三倍体毛白杨超短轮伐纸浆林产量并分析其纤维形态的基础上,探讨超短经营的可行性。结果表明:三倍体毛白杨无性系对超短轮伐纸浆林树高生长影响极显著,对材积生长影响显著;造林密度对胸径与材积生长影响极显著。在9990株.hm-2栽培密度下,3年生三倍体毛白杨超短轮伐纸浆林蓄积量平均达80.1m3.hm-2。3年生三倍体毛白杨超短轮伐纸浆材纤维平均长度介于0.77～0.86mm之间,平均宽度介于24.18～28.07μm之间,长宽比位于28.83～34.59之间,基本符合制浆造纸的要求。

To determine feasibility of intensive short-rotation management of triploid hybrids of Populus tomentosa,timber yields and fiber morphology were in detail investigated in 3-year-old intensive short-rotation pulpwood plantations planted at spacing 9 900,6 660,4 995,4 440,3 330 and 2 490 tree·hm2 with hardwood container seedlings in Yanzhou,Shandong Province.It was shown that there were extremely significant differences in tree height of intensive short-rotation pulpwood,and significant differences in stem volume within clones.There were also extremely significant differences in diameter at breast height and stem volume among spacing.Mean stem volume of pulpwood plantations planted with spacing 9 900 tree·hm2 attained 80.1 m3·hm-2.Mean fiber length 3-year-old pulpwood plantations of triploid hybrids of Populus tomentosa ranged from 0.77 to 0.86 mm,mean fiber width from 24.18 to 28.07 μm and ratio between fiber length and fiber width from 28.83 to 34.59.It was suggested that all data could,to some extent,meet the need of pulp and paper making.