Distribution and statistical analysis of knots in Erythrophleum fordii plantations

doi:10.3969/j.issn.1000-2006.201603057

Distribution and statistical analysis of knots in Erythrophleum fordii plantations

HAO Jian,MENG Mingjun,HUANG Dewei,WEI Juling,LI Zhongguo,TANG Jixin, XU Daping

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (03) : 100-104.

PDF(1781142 KB)

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (03) : 100-104. DOI: 10.3969/j.issn.1000-2006.201603057

Distribution and statistical analysis of knots in Erythrophleum fordii plantations

HAO Jian^1,2,MENG Mingjun¹,HUANG Dewei¹,WEI Juling¹,LI Zhongguo¹,TANG Jixin¹, XU Daping^2*

Author information +

History +

Abstract

【Objective】 In order to investigate the formation and distribution characteristics of knots during the process of Erythrophleum fordii growth, and screen out the key factors to establish a multiple regression model to predict the effects on branch wood after forming knot by step wise regression analysis. 【Methods】 Thirty years old E. fordii plantation was researched by using a stem analysis method. 【Results】The results indicated that compared with geographical location, slope direction was the important factor influencing the distribution of E. fordii branches. Most knots were distributed on the highest utilization region of E. fordii trunks(2.0-8.0 m), which seriously reduced the wood utilization value. When branch angle was less than 60°, the knot diameter was greater than 2.5 cm. As the branch diameter increased, the length between dead knots and the span of knots in xylem was larger. Peak forming on branches occurred at 1-15 years. Branch wound healing was concentrated at 16-25 years, and most dead knots formed at 11-20 years, which was the critical period for the control of dead knot formation. Diameter of the branch(BD), insertion angle of the branch(IA), and year of birth of the branch(YB)were selected as key factors to establish a multiple regression model by step wise regression analysis, y_RT = 1.634 4x_BD + 0.067 8x_IA + 0.164 8 x_YB-1.611 4(F = 106.869 7, P = 0.000 1). 【Conclusions】The model was suitable to predict the effects on branch wood caused by knot formation.

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

HAO Jian,MENG Mingjun,HUANG Dewei,WEI Juling,LI Zhongguo,TANG Jixin, XU Daping. Distribution and statistical analysis of knots in Erythrophleum fordii plantations[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(03): 100-104 https://doi.org/10.3969/j.issn.1000-2006.201603057

References

[1] 黄素涌, 王建和, 吕建雄, 等. 世界节子研究进展[J]. 林产工业, 2011, 38(5): 3-7. HUANG S Y, WANG J H, LYU J X, et al. Review of overall research on knots[J]. China Forest Products Industry, 2011, 38(5): 3-7.
[2] BODIG J, JAYNE B A. Mechanics of wood and wood composites[M]. New York: Van Nostrand Reinhold, 1981:712.
[3] LEMIEUX H, SAMSON M, USENIUS A. Shape and distribution of knots in a sample of Picea abies logs[J]. Scandinavian Journal of Forest Research, 1997, 12(1): 50-56. DOI: 10.1080/02827589709355383.
[4] FUJIMORI T. Dynamics of crown structure and stem growth based on knot analysis of a hinokicypress[J]. Forest Ecology and Management, 1993, 56(1): 57-68. DOI: 10.1016/0378-1127(93)90103-T.
[5] MÄKINEN H. Effect of stand density on radial growth of branches of Scots pine in southern and central Finland[J]. Canadian Journal of Forest Research, 1999, 29(8): 1216-1224. DOI:10.1139/x99-060.
[6] MÄKINEN H. Effect of stand density on the branch development of silver birch(Betula pendula Roth)in central Finland[J]. Trees, 2002, 16(4-5): 346-353. DOI:10.1007/s00468-002-0162-x.
[7] KERSHAW Jr J A, MAGUIRE D A, HANN D W. Longevity and duration of radial growth in Douglas-fir branches[J]. Canadian Journal of Forest Research, 1990, 20(11): 1690-1695. DOI:10.1139/x90-225.
[8] 史军辉, 黄忠良, 蚁伟民,等. 渐危植物格木群落动态及其保护对策[J]. 西北林学院学报, 2005, 20(3):65-69. SHI J H HUANG Z L, YI W M, et al. Dynamics of Erythrophleum fordii community and conservation strategies[J]. Journal of Northwest Forestry University, 2005, 20(3):65-69.
[9] 黄忠良, 郭贵仲, 张祝平. 渐危植物格木的濒危机制及其繁殖特性的研究[J]. 生态学报, 1997, 17: 671-676. HUANG Z L, GUO G Z, ZHANG Z P.A study about endangered mechanism of Erythrophleum fordii[J]. Acta Ecologica Sinica, 1997, 17: 671-676.
[10] 赵志刚, 郭俊杰, 沙二, 等. 我国格木的地理分布与种实表型变异[J]. 植物学报, 2009, 44(3): 338-344. ZHAO Z G, GUO J J, SHA E, et al. Geographic distribution and phenotypic variation of fruit and seed of Erythrophleum fordii in China[J]. Chinese Bulletin of Botany, 2009, 44(3): 338-344.
[11] 方夏峰, 方柏州. 闽南格木木材物理力学性质的研究[J]. 福建林业科技, 2007, 34(2): 146-147. DOI: 10.13428/j.cnki.fjlk.2007.02.037. FANG X F, FANG B Z. Wood physical and mechanical properties of Erythrophleum fordii in southern Fujian [J]. Journal of Fujian Forestry Science and Technology, 2007, 34(2): 146-147.
[12] 贾炜玮. 樟子松人工林枝条生长及节子大小预测模型的研究[D]. 哈尔滨:东北林业大学, 2006. JIA W W. Predicting models of branch growth and knot properties for Mongolian Scots pine in plantation[D]. Harbin:Northeast Forestry University, 2006.
[13] 陈东升, 金钟跃, 李凤日, 等. 樟子松节子的大小及分布[J]. 东北林业大学学报, 2007, 35(5):19-21. DOI: 10.13759/j.cnki.dlxb.2007.05.006. CHEN D S, JIN Z Y, LI F R, et al. Knot size and distribution of Mongolian pine plantations[J]. Journal of Northeast Forestry University, 2007, 35(5):19-21.
[14] SPIECKER H, HEIN S. Comparative analysis of occluded branch characteristics for Fraxinus excelsior and Acer pseudoplatanus with natural and artificial pruning[J]. Canadian Journal of Forest Research, 2007, 37(8): 1414-1426. DOI:10.1139/X06-308.
[15] 方升佐, 徐锡增, 严相进, 等. 修枝强度和季节对杨树人工林生长的影响[J]. 南京林业大学学报(自然科学版), 2000, 24(6):6-10.DOI: 10.3969/j.issn.1000-2006.2000.06.002. FANG S Z, XU X Z, YAN X J, et al. Effects of pruning intensities and pruning seasons on the growth dynamics of the poplar plantation[J]. Journal of Nanjing Forestry University(Natural Sciences Edition), 2000, 24(6):6-10.
[16] DELEUZE C, HERVé J C, COLIN F, et al. Modelling crown shape of Picea abies: spacing effects[J]. Canadian Journal of Forest Research, 1996, 26(11): 1957-1966. DOI:10.1139/x26-221.
[17] CLUZEAU C, GOFF N L, OTTORINI J M. Development of primary branches and crown profile of Fraxinus excelsior[J]. Canadian Journal of Forest Research, 1994, 24(12): 2315-2323. DOI: 10.1139/ x94-299.
[18] LEMIEUX H, BEAUDOIN M, ZHANG S Y. Characterization and modeling of knots in black spruce(Picea mariana)logs[J]. Wood and Fiber Science, 2001, 33(3):465-475.

PDF(1781142 KB)

Accesses

Citation

Detail

Sections

Recommended

The full text is translated into English by AI, aiming to facilitate reading and comprehension. The core content is subject to the explanation in Chinese.

www.nldxb.njfu.edu.cn

Edited ＆ Published by Editorial Department of Nanjing Forestry University(Natural Sciences Edition)
Address： No.159 Longpan Road,Nanjing 210037 Jiangsu,P.R.China
E-mail ：xuebao@njfu.edu.cn , xuebao@njfu.com.cn
Telephone +86-25-85428247,85427076
Distributed by China International Book Trading Corporation P.O. Box 399, Beijing ,P.R. China

〈

〉

Please choose a citation manager

Content to export