林地施肥对Ⅰ-214杨木材性质的影响

Effect of Fertilization on the Wood Properties of Populus' I -214'

本文系统地研究了林地施肥与Ⅰ-214杨木材性质的关系。其结果:林地施肥后,木材纤维的长度、宽度、壁厚及化学组成的α-纤维素的数均值呈上升趋势;木材细胞次生壁S_2层的微纤丝角由19.4度减至18.3度,纤维素的相对结晶度由54.5％增加为56.3％;木材的物理力学性质诸项指标,虽互有高低,经方差分析验证,尚未达到差异显著水平;化学机械浆(CMP)制浆特征和浆张的物理性质,除多量施肥的化学预处理后得率(89.2％)稍高外,其他各项指标相近。

After the fertilizers were applied to forest land in Populus 'I-214' plantations, the average values of wood fibre length and width, wall thickness, relative crystallinity of cellulose and the chemical composition of a-cellulose showed a rising tendency but the microfibrillar angle of S2 layer of secondary wall of the wood cell a declining one (from 19.4°~18.3°). The values of the mechanical and physical properties of wood from treated or untreated plantations were different. But after they were checked by the analysis of variance, there were no obvious difference between them. The values of the physical properties of pulping and paper for chemical and mechanical pulping were similar except the yield rate (89.2 %) was a bit high after the chemical preprocessing of heavily fertilized wood.