| 黄土高原区不同密度刺槐林冠层结构特征及月动态变化 |
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| 引用本文： | 周慧,赵忠,周靖靖,王海泽,王飞.黄土高原区不同密度刺槐林冠层结构特征及月动态变化[J].林业科技开发,2011,25(5):16-20. |
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| 作者姓名： | 周慧 赵忠 周靖靖 王海泽 王飞 |
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| 作者单位： | 西北农林科技大学西部环境与生态教育部重点实验室,陕西杨凌,712100 |
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| 基金项目： | 国家“十一五”科技支撑计划项目(编号:2006BAD03A1207) |
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| 摘 要： | 为合理经营黄土高原区刺槐人工林,利用LAI-2200植物冠层分析仪,研究了不同密度刺槐人工林冠层结构特征及月变化。结果表明:密度对LAI(叶面积指数)有影响,随着密度的增加,林分叶面积指数趋于一致;在生长月份上,LAI为先增后降趋势,最大值出现在6月底。密度与冠层开度呈显著负相关,随着密度的增加,刺槐林DIFN明显降低,925～1 125株/hm2与其他3个密度林分有显著性差异;DIFN(无截取散射)随月份的变化均呈"V"字型变化,在6月底至8月初DIFN最低。密度与MTA(平均叶倾角)呈显著正相关,密度在925～1 125株/hm2范围的刺槐林分,叶片几乎处于水平状态,其他3种密度林分MTA均在40°～50°之间有最大分布频率,而月份对MTA影响不显著。对叶面积指数与冠层开度进行回归分析,发现两者之间呈指数回归关系(R2=0.998)。
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| 关 键 词： | 刺槐人工林 林分密度 冠层结构 叶面积指数 月动态 |
Canopy structure of black locust plantations with different densities and monthly dynamics in the Loess Plateau |
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| ZHOU Hui,ZHAO Zhong,ZHOU Jing-jing,WANG Hai-ze,WANG Fei.Canopy structure of black locust plantations with different densities and monthly dynamics in the Loess Plateau[J].China Forestry Science and Technology,2011,25(5):16-20. |
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| Authors: | ZHOU Hui ZHAO Zhong ZHOU Jing-jing WANG Hai-ze WANG Fei |
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| Institution: | ZHOU Hui,ZHAO Zhong,ZHOU Jing-jing,WANG Hai-ze,WANG Fei Key Laboratory of Environment and Ecology in Western China of Ministry of Education,North-west A & F University,Yangling 712100,Shanxi,China |
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| Abstract: | In order to develop the reasonable managements in the black locust plantations in the Loess Plateau,the characteristics of canopy structure(Leaf area index,LAI;Diffuse non-interceptance,DIFN;Mean tilt angle,MTA) of black locust plantations with different densities and monthly dynamics were studied by using a LAI-2200 plant canopy analyzer.The results showed that the densities had affection on LAI,and LAI converged with the increases of density of black locust stands.With the increase of density,LAI increase... |
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| Keywords: | black locust plantations stand density canopy structure leaf area index monthly dynamics |
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