Relationship between Planting Density and Tree Growth Process of Betula alnoides Mid-young Plantations in Pingxiang, Guangxi

WANG Chun-sheng; ZHAO Zhi-gang; ZENG Ji; GUO Jun-jie; SHA Er; GUO Wen-fu; ZENG Jie; ZHENG Hai-shui

Volume 26 Issue 2

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Relationship between Planting Density and Tree Growth Process of Betula alnoides Mid-young Plantations in Pingxiang, Guangxi

1.
Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China
2.
Experimental Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang 532600, Guangxi, China

Received Date: 2012-05-14

Abstract

11-year-old Betula alnoides plantations for density trial with five planting spacing treatments were investigated through stem analysis at Pingxiang City, Guangxi, to assess the effects of initial density on tree growth process. The results showed that the initial density had no remarkable effects on tree height growth and stem shape index, while there were significant differences in diameter at breast height (DBH), individual tree volume and stand volume among treatments of initial density, and the stand volume of treatment of 2 m×3 m was significantly higher than that of other treatments. The fast growing period of DBH trended to increase with the decrease of initial density, the DBH growth commenced to decrease since the sixth year after planted under the 1.5 m×2 m treatment, while it decreased mostly since the eighth year under other treatments, indicating that thinning should be conducted at the sixth year for 1.5 m×2 m treatment, and at the eighth year for 2 m×3 m and 3 m×3 m treatments, while for other treatments, it was delayed with the decrease of density. All the current and mean annual increment curves of tree height crossed when 5-6 years old, and did not reach quantity mature until 11 years old for all density treatments, while remarkable differences of the current annual increment of individual tree volume were seen among treatments. Taking factors such as growth performance, stand volume, and use efficiency of forest land, etc. into consideration, 2 m×3 m was determined as the most optimum planting density in the present study.
- Betula alnoides,
- growth process,
- planting density,
- stem analysis

References

[1]	郑海水, 黎明, 汪炳根, 等. 西南桦造林密度与林木生长的关系[J]. 林业科学研究, 2003,16(1): 81-86
[2]	Stoneman G L, Crombie D S, Whitford K, et al. Growth and water relations of Eucalyptus marginata (jarrah) stands in response to thinning and fertilization[J]. Tree Physiology, 1996,16: 267-274
[3]	Peltola H, Gort J, Pulkkinen P, et al. Differences in growth and wood density traits in Scots Pine (Pinus sylvestris L.) genetic entries grown at different spacing and sites[J]. Silva Fennica, 2009,43(3): 339-354
[4]	Ray D, Yanai R D, Nyland R D, et al. Growthing-space relationships in young even-aged northern hardwood stands based on individual-tree and plot-level measurements[J]. Northern Journal of Applied Forestry, 2011,28(1): 27-35
[5]	Zhang J, Oliver W W, Ritchie M W. Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA[J]. Forest Ecology and Management, 2007,244: 50-59
[6]	段爱国, 张建国, 童书振, 等. 杉木人工林林分直径结构动态变化及其密度效应的研究[J]. 林业科学研究, 2004,17(2): 178-184
[7]	童书振, 盛炜彤, 张建国. 杉木林分密度效应研究[J]. 林业科学研究, 2002,15(1): 66-75
[8]	谌红辉, 丁贵杰. 马尾松造林密度效应研究[J]. 林业科学, 2004,40(1):92-98
[9]	张连金, 惠刚盈, 孙长忠. 马尾松人工林首次间伐年龄的研究[J]. 中南林业科技大学学报: 自然科学版, 2011,31(6): 22-27
[10]	段劼, 马履一, 贾黎明, 等. 北京地区侧柏人工林密度效应[J]. 生态学报, 2010,30(12): 3206-3214
[11]	李国雷, 刘勇, 吕瑞恒, 等. 华北落叶松人工林密度调控对林下植被发育的作用过程[J]. 北京林业大学学报, 2009, 31(1): l9-31
[12]	田新辉, 孙荣喜, 李军, 等. 107 杨人工林密度对林木生长的影响[J]. 林业科学, 2011,47(3): 184-188
[13]	Hein S, Weiskittel A R, Kohnle U. Effect of wide spacing on tree growth, branch and sap wood properties of young Douglas-fir (Pseudotsuga menziesii(Mirb.) Franco) in south western Germany[J]. European journal of forest research, 2008,127: 481-493
[14]	Machado S D A, Silva L C R d, Figura M A, et al. Comparison of methods for estimating heights from complete stem analysis data for Pinus taeda[J]. Ciência Florestal, 2010,20(1): 45-55
[15]	Perez D. Growth and volume equations developed from stem analysis for Tectona grandis in Costa Rica[J]. Journal of Tropical Forest Science, 2008,20(1): 66-75
[16]	曾杰, 郭文福, 赵志刚, 等. 我国西南桦研究的回顾与展望[J]. 林业科学研究, 2006,19(3): 379-384
[17]	潘存娥, 田丽萍, 张天义, 等. 准噶尔盆地箭杆杨生长规律的研究[J]. 新疆农业科学, 2010,47(11): 2195-2199
[18]	Hein S, Spiecker H. Crown and tree allometry of open-grown ash (Fraxinus excelsior L.) and sycamore (Acer pseudoplatanus L.)[J]. Agroforest System, 2008,73: 205-218
[19]	孟宪宇. 测树学[M]. 北京: 中国林业出版社,2006
[20]	Hummel S. Height, diameter and crown dimensions of Cordia alliodora associated with tree density[J]. Forest Ecology and Management, 2000,127: 31-40

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沈阳化工大学材料科学与工程学院沈阳 110142

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Relationship between Planting Density and Tree Growth Process of Betula alnoides Mid-young Plantations in Pingxiang, Guangxi

1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, Guangdong, China

2. Experimental Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang 532600, Guangxi, China

Received Date: 2012-05-14

Abstract: 11-year-old Betula alnoides plantations for density trial with five planting spacing treatments were investigated through stem analysis at Pingxiang City, Guangxi, to assess the effects of initial density on tree growth process. The results showed that the initial density had no remarkable effects on tree height growth and stem shape index, while there were significant differences in diameter at breast height (DBH), individual tree volume and stand volume among treatments of initial density, and the stand volume of treatment of 2 m×3 m was significantly higher than that of other treatments. The fast growing period of DBH trended to increase with the decrease of initial density, the DBH growth commenced to decrease since the sixth year after planted under the 1.5 m×2 m treatment, while it decreased mostly since the eighth year under other treatments, indicating that thinning should be conducted at the sixth year for 1.5 m×2 m treatment, and at the eighth year for 2 m×3 m and 3 m×3 m treatments, while for other treatments, it was delayed with the decrease of density. All the current and mean annual increment curves of tree height crossed when 5-6 years old, and did not reach quantity mature until 11 years old for all density treatments, while remarkable differences of the current annual increment of individual tree volume were seen among treatments. Taking factors such as growth performance, stand volume, and use efficiency of forest land, etc. into consideration, 2 m×3 m was determined as the most optimum planting density in the present study.

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Reference (20)

[1]	郑海水, 黎明, 汪炳根, 等. 西南桦造林密度与林木生长的关系[J]. 林业科学研究, 2003,16(1): 81-86
[2]	Stoneman G L, Crombie D S, Whitford K, et al. Growth and water relations of Eucalyptus marginata (jarrah) stands in response to thinning and fertilization[J]. Tree Physiology, 1996,16: 267-274
[3]	Peltola H, Gort J, Pulkkinen P, et al. Differences in growth and wood density traits in Scots Pine (Pinus sylvestris L.) genetic entries grown at different spacing and sites[J]. Silva Fennica, 2009,43(3): 339-354
[4]	Ray D, Yanai R D, Nyland R D, et al. Growthing-space relationships in young even-aged northern hardwood stands based on individual-tree and plot-level measurements[J]. Northern Journal of Applied Forestry, 2011,28(1): 27-35
[5]	Zhang J, Oliver W W, Ritchie M W. Effect of stand densities on stand dynamics in white fir (Abies concolor) forests in northeast California, USA[J]. Forest Ecology and Management, 2007,244: 50-59
[6]	段爱国, 张建国, 童书振, 等. 杉木人工林林分直径结构动态变化及其密度效应的研究[J]. 林业科学研究, 2004,17(2): 178-184
[7]	童书振, 盛炜彤, 张建国. 杉木林分密度效应研究[J]. 林业科学研究, 2002,15(1): 66-75
[8]	谌红辉, 丁贵杰. 马尾松造林密度效应研究[J]. 林业科学, 2004,40(1):92-98
[9]	张连金, 惠刚盈, 孙长忠. 马尾松人工林首次间伐年龄的研究[J]. 中南林业科技大学学报: 自然科学版, 2011,31(6): 22-27
[10]	段劼, 马履一, 贾黎明, 等. 北京地区侧柏人工林密度效应[J]. 生态学报, 2010,30(12): 3206-3214
[11]	李国雷, 刘勇, 吕瑞恒, 等. 华北落叶松人工林密度调控对林下植被发育的作用过程[J]. 北京林业大学学报, 2009, 31(1): l9-31
[12]	田新辉, 孙荣喜, 李军, 等. 107 杨人工林密度对林木生长的影响[J]. 林业科学, 2011,47(3): 184-188
[13]	Hein S, Weiskittel A R, Kohnle U. Effect of wide spacing on tree growth, branch and sap wood properties of young Douglas-fir (Pseudotsuga menziesii(Mirb.) Franco) in south western Germany[J]. European journal of forest research, 2008,127: 481-493
[14]	Machado S D A, Silva L C R d, Figura M A, et al. Comparison of methods for estimating heights from complete stem analysis data for Pinus taeda[J]. Ciência Florestal, 2010,20(1): 45-55
[15]	Perez D. Growth and volume equations developed from stem analysis for Tectona grandis in Costa Rica[J]. Journal of Tropical Forest Science, 2008,20(1): 66-75
[16]	曾杰, 郭文福, 赵志刚, 等. 我国西南桦研究的回顾与展望[J]. 林业科学研究, 2006,19(3): 379-384
[17]	潘存娥, 田丽萍, 张天义, 等. 准噶尔盆地箭杆杨生长规律的研究[J]. 新疆农业科学, 2010,47(11): 2195-2199
[18]	Hein S, Spiecker H. Crown and tree allometry of open-grown ash (Fraxinus excelsior L.) and sycamore (Acer pseudoplatanus L.)[J]. Agroforest System, 2008,73: 205-218
[19]	孟宪宇. 测树学[M]. 北京: 中国林业出版社,2006
[20]	Hummel S. Height, diameter and crown dimensions of Cordia alliodora associated with tree density[J]. Forest Ecology and Management, 2000,127: 31-40

Relationship between Planting Density and Tree Growth Process of Betula alnoides Mid-young Plantations in Pingxiang, Guangxi

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通讯作者: 陈斌, bchen63@163.com

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Relationship between Planting Density and Tree Growth Process of Betula alnoides Mid-young Plantations in Pingxiang, Guangxi

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