杉木林分密度效应研究

童书振; 盛炜彤; 张建国

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杉木林分密度效应研究

童书振 , 盛炜彤 , 张建国

文章导航 > 林业科学研究 > 2002 > 15(1): 61-65

引用本文:

Citation:

杉木林分密度效应研究

1.
中国林业科学研究院林业研究所,北京100091
基金项目:
国家攻关专题“杉木建筑材树种遗传改良及大中径材培育技术研究”(960110301)
中图分类号: S758.5

Studies on the Density Effects of Chinese Fir Stands

1.
Research Institute of Forestry, CAF Beijing 100091, China
CLC number: S758.5

摘要: 该项试验共分 2个部分。 (1)造林密度试验,小区面积为 600m2,5个处理,即 1667株·hm-2(A)、3333株·hm-2 (B)、4 983株·hm-2 (C)、6633株·hm-2 (D)、996 7株·hm-2 (E);(2)造林密度调控试验,造林设计方法与造林密度试验相同,但在林分生长过程中,按密度管理图的密管线 0.5为标准进行间伐,间伐后保留密度要与临近的下一个初植密度较稀植
- 杉木
- / 造林密度
- / 密度调控
- / 林分生长
Abstract: There are three parts in this research, including the effects of different planting density, different thinning intensity and planting density thinning on the growth of Chinese fir stand. (1)Planting density experiment consist of five density treatments:A(1 666 trees·hm-2), B(3 333 trees·hm-2),C(5 000 trees·hm-2), D(6 666 trees·hm-2) and E(10 000 tress·hm-2). The result of experiment shows that the dominant height, average height and diameter at breast height (DBH)of stands increases with the increase of stand age, and decreases with the increase of stand density. The dominant height after age 9, average height after age 6 and DBH after age 5 have evident differences among different stand densities. Stand volume increase with the increase of stand age, and it reaches evident difference from age 5 to 7 among different densities, but it only has remarkable differences between A and E or D from age 8 to 18. The tree height under first branch increases with the increase of stand density and trees age, the difference among C,D and E are not obvious after age 12. The crown diameter decreases with the increase of stand density, and increases with the increase of trees age, the differences among different stand densities decreases after age 9 10. (2)The primary planting density for the thinning test of planting density is same as the planting density experiment, thinning methods are that C is reduced to D and D is reduced to E after thinning. The results shows that at same site index class, comparing the unthinned stand with the thinned stand which keeps the same density with the unthinned stand after thinned, their average height and dominant height has no evident difference, but the standing tree volume of thinned stand is lower than that of unthinnned stand, the total volume (standing tree volume + thinned tree volume) of thinned stand is higher than that of unthinned stand, the ratio of total volume of thinned stand with high primary density to unthinned stand is higher than that of thinned stand with low primary density to unthinned stand. At the same primary density, the ratio of volume thinned stand to unthinned stand at the high site index class is higher than that at the low site index class.
- Chinese fir
- / planting density
- / density control
- / growth of stand

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[3]	王春胜 , 赵志刚 , 曾冀 , 郭俊杰 , 沙二 , 郭文福 , 曾杰 , 郑海水 . 广西凭祥西南桦中幼林林木生长过程与造林密度的关系. 林业科学研究, 2013, 26(2): 257-262.
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[5]	郑海水 , 黎明 , 汪炳根 , 冯益谦 . 西南桦造林密度与林木生长的关系. 林业科学研究, 2003, 16(1): 81-86.
[6]	玉宝 , 王百田 , 乌吉斯古楞 . 干旱半干旱区人工林密度调控技术研究现状及趋势. 林业科学研究, 2010, 23(3): 472-477.
[7]	李思佳 , 张怀清 , 李永亮 , 杨廷栋 , 贺建平 , 马载阳 , 沈康 . 基于样本库的杉木林分生长动态可视化模拟. 林业科学研究, 2019, 32(1): 21-30. doi: 10.13275/j.cnki.lykxyj.2019.01.004
[8]	郑芳楫 , 高传璧 , 朱永元 , 任华东 , 方玉霖 , 李纪元 . 黑荆树造林密度试验*. 林业科学研究, 1994, 7(6): 595-599.
[9]	陈少雄 , 杨民胜 , 王理平 . 尾叶桉造林密度与蓄积量、抗风和材性关系研究. 林业科学研究, 1998, 11(4): 435-438.
[10]	李光友 , 徐建民 , 陆钊华 , 陈健波 . 尾叶桉纸浆林造林密度控制技术的研究. 林业科学研究, 2002, 15(2): 175-181.
[11]	王志海 , 尹光天 , 杨锦昌 , 覃国铭 . 不同造林密度对米老排人工林枝条发育的影响. 林业科学研究, 2019, 32(2): 78-86. doi: 10.13275/j.cnki.lykxyj.2019.02.012
[12]	王翰琛 , 张雄清 , 张建国 , 屈彦成 , 姜丽 . 杉木人工林不同密度间伐林分生长优势的变化规律分析. 林业科学研究, 2021, 34(5): 32-38. doi: 10.13275/j.cnki.lykxyj.2021.005.004
[13]	孙洪刚 , 张建国 , 段爱国 . 杉木人工林自然整枝进程研究. 林业科学研究, 2014, 27(5): 626-630.
[14]	洪玲霞 . 初植密度、间伐对杉木林分优势高生长过程的影响. 林业科学研究, 1997, 10(4): 448-452.
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杉木林分密度效应研究

1. 中国林业科学研究院林业研究所,北京100091

收稿日期: 2000-11-15

基金项目: 国家攻关专题“杉木建筑材树种遗传改良及大中径材培育技术研究”(960110301)

关键词:

摘要: 该项试验共分 2个部分。 (1)造林密度试验,小区面积为 600m2,5个处理,即 1667株·hm-2(A)、3333株·hm-2 (B)、4 983株·hm-2 (C)、6633株·hm-2 (D)、996 7株·hm-2 (E);(2)造林密度调控试验,造林设计方法与造林密度试验相同,但在林分生长过程中,按密度管理图的密管线 0.5为标准进行间伐,间伐后保留密度要与临近的下一个初植密度较稀植

English Abstract

Studies on the Density Effects of Chinese Fir Stands

1. Research Institute of Forestry, CAF Beijing 100091, China

Received Date: 2000-11-15

Abstract: There are three parts in this research, including the effects of different planting density, different thinning intensity and planting density thinning on the growth of Chinese fir stand. (1)Planting density experiment consist of five density treatments:A(1 666 trees·hm-2), B(3 333 trees·hm-2),C(5 000 trees·hm-2), D(6 666 trees·hm-2) and E(10 000 tress·hm-2). The result of experiment shows that the dominant height, average height and diameter at breast height (DBH)of stands increases with the increase of stand age, and decreases with the increase of stand density. The dominant height after age 9, average height after age 6 and DBH after age 5 have evident differences among different stand densities. Stand volume increase with the increase of stand age, and it reaches evident difference from age 5 to 7 among different densities, but it only has remarkable differences between A and E or D from age 8 to 18. The tree height under first branch increases with the increase of stand density and trees age, the difference among C,D and E are not obvious after age 12. The crown diameter decreases with the increase of stand density, and increases with the increase of trees age, the differences among different stand densities decreases after age 9 10. (2)The primary planting density for the thinning test of planting density is same as the planting density experiment, thinning methods are that C is reduced to D and D is reduced to E after thinning. The results shows that at same site index class, comparing the unthinned stand with the thinned stand which keeps the same density with the unthinned stand after thinned, their average height and dominant height has no evident difference, but the standing tree volume of thinned stand is lower than that of unthinnned stand, the total volume (standing tree volume + thinned tree volume) of thinned stand is higher than that of unthinned stand, the ratio of total volume of thinned stand with high primary density to unthinned stand is higher than that of thinned stand with low primary density to unthinned stand. At the same primary density, the ratio of volume thinned stand to unthinned stand at the high site index class is higher than that at the low site index class.

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杉木林分密度效应研究

Studies on the Density Effects of Chinese Fir Stands

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杉木林分密度效应研究

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Studies on the Density Effects of Chinese Fir Stands

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