植物研究2024，Vol.44Issue(2)：248-258,11.DOI:10.7525/j.issn.1673-5102.2024.02.010
东北地区不同间伐强度青山杨人工林生长及木材性状变异
Growth and Wood Character Variation of Populus pseudo-cathyana×Populus deltoids Plantation with Different Thinning Intensity in Northeast China
摘要
Abstract
To explore the effects of different thinning intensity on the growth and wood properties of Populus pseudo-cathyana×Populus deltoids plantation,and to provide a theoretical basis for cultivating high-quality industrial resources of poplar in northeast China,the 18-year old Populus pseudo-cathyana×Populus deltoids was used as the material,and the initial plant row spacing of 2 m×3 m was used as the control,and the thinning treatments of 3 m×3 m,6 m×3 m,4 m×6 m were set up.The growth characteristics(tree height,DBH,2 m diameter,crown width)and wood properties(basic density,fiber length,fiber width,hemicellulose content,cellulose content,semi-cellulose content,lignin content)of the experimental forest were measured in the 5th year after thinning,and the volume per tree and the storage per unit area were calculated using tree height and DBH.The results of variance analysis showed that all indexes were significantly different except basic density(P＜0.01).The results of mean analysis showed that the mean values of each growth index and lignin content reached the maximum when the row spacing was 6 m×3 m,and the other wood indexes reached the maximum when the row spacing was 4 m×3 m or 6 m×4 m.The variation of phenotypic coefficient of each index ranged from 3.35%to 29.87%.In addition to the basic density,the repetitive force of each index exceeded 0.590.The results of correlation analysis showed that there were significant positive correlations among the growth indicators(0.690＜r＜0.993),but the correlation between wood traits and growth traits was weak.It was found that Qi reached the maximum when the row spacing was 6 m×3 m,4 m×6 m and 4 m×6 m,respectively,by using growth traits,wood traits and combined growth and wood traits as evaluation indexes.Thinning might promote the growth of stand and improve the wood property of the forest,and the wood property and the comprehensive improvement effect of the forest growth and wood would be better when the row spacing of the trees is 4 m×6 m.The best growth results were obtained when the row spacing was 6 m×3 m.Therefore,suitable thinning intensity might be selected according to different cultivation objectives for the cultivation of poplar high quality industrial resources in northeast China in the future.关键词
青山杨/间伐强度/生长性状/木材性状Key words
Populus pseudo-cathyana×Populus deltoids/thinning intensity/growth traits/wood character分类
农业科技引用本文复制引用
徐晶,崔莹,王福森,李开隆,曲冠证,赵曦阳..东北地区不同间伐强度青山杨人工林生长及木材性状变异[J].植物研究,2024,44(2):248-258,11.基金项目
国家重点研发计划项目(2021YFD2201204). （2021YFD2201204）
