| 不同林龄光皮桦生物量分布初探 |
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| 引用本文： | 程开云,胡廷刚,宋曰钦,叶卫飞.不同林龄光皮桦生物量分布初探[J].中国林副特产,2012(2):17-20. |
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| 作者姓名： | 程开云 胡廷刚 宋曰钦 叶卫飞 |
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| 作者单位： | 1. 黄山市徽州区林业局,安微黄山,245061
2. 黄山学院生命与环境科学学院,安徽黄山,245041 |
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| 摘 要： | 对3个不同年龄的光皮桦生物量分布规律的研究结果表明:在2～4年内,光皮桦单株生物量随年龄的增大而迅速增大,表现出良好的速生性,4年生时单株生物量是3年生的238.0%,是2年生生物量的363.4%。从单株生物量的组成来看,干所占比例随年龄增大而增大,从2年生时的45.8%,增加到3年生时的56.4%和4年生的58.2%,枝、叶所占比例则随年龄增加而下降,其中枝的比例从2年生时的26.7%下降到3年生时的20.5%和4年生时的21.6%,叶的比例从2年生时的3.6%下降到3年生时的2.3%和4年生时的2.2%。而不同年龄根系的生物量均表现为主根>侧根>细根。随着林龄的增加,光皮桦单株根冠比在下降,即从2年生时的0.31下降到4年生时的0.22。
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| 关 键 词： | 光皮桦 生物量分布 不同林龄 |
Study on Biomass Distribution of Betula luminiferaat Different Ages |
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| Chen Kaiyun,Hu Tinggang,Song Yueqin,Ye Weifei.Study on Biomass Distribution of Betula luminiferaat Different Ages[J].Forest By-product and Speciality in China,2012(2):17-20. |
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| Authors: | Chen Kaiyun Hu Tinggang Song Yueqin Ye Weifei |
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| Institution: | 1.Forest bureau of Huizhou district of Huangshan city,Huangshan,Anhui 245100; 2.Huangshan University,Huangshan,Anhui 245041) |
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| Abstract: | The biomass distribution of Betula luminifera was studied at different ages,the results showed that： the biomass of Betula luminifera was increased with age,single plant biomass at 4a is 238.0% compared to 3a＇,is 363.4% to 2a＇.The composition of single plant biomass was different at different ages,The trunk proportion increased with age,which increased from 45.8% at 2a to 56.4% at 3a and 58.2% at 4a,The proportion of branch and leaf decreased by ages,the proportion of branche was 26.7% at 2a decreasd 20.5% at 3a and 21.6% at 4a,the proportion of leaves decreased from 3.6%at 2a to 2.3%,2.2% at 3a,4a respectively.The biomass distribution of root was taproot root lateral fine roots at different ages.The ratio of root to shoot decreased from0.31 at 2a to 0.22 at 4a. |
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| Keywords: | Betula luminifera Biomass distribution Different ages |
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