| 苦竹叶片性状及其异速生长关系的密度效应 |
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| 引用本文： | 林华,陈双林,郭子武,杨清平,高平珍.苦竹叶片性状及其异速生长关系的密度效应[J].林业科学研究,2017,30(4):617-623. |
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| 作者姓名： | 林华 陈双林 郭子武 杨清平 高平珍 |
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| 作者单位： | 福建省沙县林业局, 福建 沙县 365500,中国林业科学研究院亚热带林业研究所, 浙江 杭州 311400,中国林业科学研究院亚热带林业研究所, 浙江 杭州 311400,中国林业科学研究院亚热带林业研究所, 浙江 杭州 311400,中国林业科学研究院亚热带林业研究所, 浙江 杭州 311400 |
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| 基金项目： | "十三五"国家重点研发计划重点专项课题（2016YFD0600903）;2015年度林业科技成果国家级推广项目（[2015]35）;国家星火计划项目（2012GA720007） |
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| 摘 要： | 目的]揭示苦竹叶片性状及其异速生长关系对密度的响应特征,为苦竹林培育适宜林分密度构建提供参考。方法]开展了3种密度(低密度,14 430~16 545株·hm~(-2),L;中密度,31 590~34 560株·hm~(-2),M;高密度,54 120~55 560株·hm~(-2),H)苦竹纯林1~3年生立竹叶长(LL)、叶宽(LW)、叶面积(LA)、叶干质量(LM)等主要叶性因子测定,采用标准主轴回归分析解析叶性因子及其异速生长关系随密度的变异规律。结果]研究表明:随着立竹年龄的增加,相同密度苦竹林的叶长、叶形指数和比叶面积均呈先升高后降低趋势,叶宽和叶面积总体呈降低趋势。随着密度的增加,相同年龄立竹叶长、叶宽、叶形指数、叶面积和比叶面积总体均呈先升高后降低趋势,其中,叶面积和比叶面积不同密度竹林间差异显著。3种密度苦竹林b_(LL-LA)、b_(LW-LA)、b_(LL-LM)、b_(LW-LM)及中密度、低密度苦竹林b_(LA-LM)均显著小于1.0,呈异速生长关系,而高密度苦竹林b_(LA-LM)接近1.0,呈等速生长关系。随着密度的增加,b_(LL-LA)、b_(LL-LM)呈先升高后降低趋势,而b_(LW-LM)、b_(LA-LM)则相反,且b_(LL-LA)、b_(LL-LM)和b_(LA-LM)不同密度竹林间差异显著。b_(LW-LA)随密度的增加呈升高趋势,中密度、低密度竹林间无显著差异,均显著低于高密度竹林。结论]密度对苦竹林主要叶性因子及其异速生长关系会产生明显的影响,其中叶长对密度变化敏感,中密度(31 590~34 560株·hm~(-2))苦竹林具有较大叶长、叶宽、叶面积和比叶面积,因而具有较高的生产能力,是苦竹林培育的适宜密度。
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| 关 键 词： | 苦竹 叶性因子 功能性状 异速生长关系 立竹密度 |
| 收稿时间： | 2016/8/3 0:00:00 |
Allometric Relationship among Leaf Traits in Different Stand Density of Pleioblastus amarus |
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| LIN Hu,CHEN Shuang-lin,GUO Zi-wu,YANG Qing-ping and GAO Ping-zhen.Allometric Relationship among Leaf Traits in Different Stand Density of Pleioblastus amarus[J].Forest Research,2017,30(4):617-623. |
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| Authors: | LIN Hu CHEN Shuang-lin GUO Zi-wu YANG Qing-ping and GAO Ping-zhen |
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| Institution: | Forestry Bureau of Shaxian County, Shaxian 365500, Fujian, China,Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang, China,Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang, China,Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang, China and Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang, China |
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| Abstract: | Objective] To approach the response of leaf traits and the allometric relationship of Pleioblastus amarus to stand densities, so as to provide a theoretical guidance for its cultivation and management. Method] Leaf length (LL), width (LW), area (LA) and weight (LM) of 1-3 years old bamboo from three stand densities (low density, 14 430-16 545 stems·hm-2, L; medium density, 31 590-34 560 stems·hm-2, M; high density, 54 120-55 560 stems·hm-2, H) of P. amarus forest was measured, the characteristics of leaf traits and its allometric relationship was analyzed by standardized major axis method (SMA). Result] With increasing bamboo age, the leaf length, leaf shape index (ratio of leaf length to leaf width) and specific leaf area decreased after an initial increase, while the leaf width and leaf area had an overall decrease. With increasing stand density, the leaf length, leaf width, leaf shape index, leaf area and specific leaf area all increased at first but decreased then. There were significant difference on leaf area and specific leaf area among three stand densities. bLL-LA, bLW-LA, bLL-LM and bLW-LM for three stand densities, bLA-LM for low stand density and medium stand density was significantly smaller than 1.0, which indicated the relationship between leaf length, leaf width and leaf area, leaf mass of the experimental stands, and the relationship between leaf area and leaf mass for low stand density and medium stand density were allometric growth. While bLA-LM of high stand density was close to 1.0, indicating relative growth between them for high stand density was isometric. With increasing stand density, bLL-LA and bLW-LM decreased after an initial increase, while bLW-LM and bLA-LM changed in the opposite trend. Furthermore, there were significant difference on bLL-LA, bLL-LM and bLA-LM among the three stand densities. bLW-LA increased overall with increasing stand density, bLW-LA for high stand density was obviously higher than that of other two stand densities. Conclusion] The density impacted the leaf traits and their allometric relationship of P. amarus heavily, and leaf length was more susceptible than the other leaf traits to density. P. amarus in the medium density (31 590-34 560 stems·hm-2) with the bigger leaf length, leaf width, leaf area and specific leaf area of the three stand densities, is the suitable density for cultivation and management. |
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| Keywords: | Pleioblastus amarus leaf traits functional traits allometric relationship stand density |
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