| 林窗对子午岭天然辽东栎群落林下植物多样性的影响 |
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| 引用本文： | 周东,刘国彬.林窗对子午岭天然辽东栎群落林下植物多样性的影响[J].中国农学通报,2010,26(22):91-98. |
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| 作者姓名： | 周东 刘国彬 |
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| 作者单位： | 1. 西北农林科技大学资源环境学院,陕西杨凌,712100
2. 中国科学院水利部水土保持研究所,陕西杨凌,712100 |
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| 基金项目： | 中国科学院"西部之光"人才资助项目和国家"十一五"科技支撑项目 |
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| 摘 要： | 为了给人工干扰天然林的更新提供科学依据，以子午岭地区天然辽东栎群落为研究对象，调查林窗和林地样方各26块，应用物种丰富度指数、Simpson多样性指数、Shannon-Wiener多样性指数和Pielou均匀度指数，对比分析辽东栎群落林窗和林地植物多样性特征差异，并研究林窗对植物多样性的影响。结果表明：（1）在天然辽东栎群落中，自然干扰形成的林窗平均面积为86.3 m2，以面积小于100 m2的中小林窗为主（占76.9%）。林窗形成方式多为干基折断。（2）林窗和非林窗植物多样性总体差异显著（P＜0.05），林窗内植物多样性指数、丰富度指数略高。（3）不同大小的林窗表现为：乔灌层物种多样性指数、均匀度指数和物种丰富度指数在75~100 m2面积的林窗内最大；草本层物种多样性指数和均匀度指数的最大值出现在0~50 m2的林窗内，丰富度指数最大值出现在75~100 m2的林窗内。
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| 关 键 词： | 休闲农业 休闲农业 休闲经济 消费行为学 需要层次论 可持续发展论 |
| 收稿时间： | 2010/6/28 0:00:00 |
| 修稿时间： | 2010/7/26 0:00:00 |
Effects of Forest Gap on Plant Diversity of Natural Quercus liaotungensis Community |
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| Zhou Dong,Liu Guobin.Effects of Forest Gap on Plant Diversity of Natural Quercus liaotungensis Community[J].Chinese Agricultural Science Bulletin,2010,26(22):91-98. |
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| Authors: | Zhou Dong Liu Guobin |
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| Institution: | 1 College of Resources and Environment,Northwest A＆F University,Yangling Shaanxi 712100;2 Institute of Soil and Water Conservation,Chinese Academy of Sciences ＆ Ministry ofW ater Resources,Yangling Shaanxi 712100) |
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| Abstract: | In order to supply a scientific basis for natural forests regeneration affected by artificial disturbance,this paper studied effects of forest gap on plant diversity of natural Quercus liaotungensis community in the Ziwuling Mountain of the Loess Plateau.Based on the investigation of 26 gaps and the non-gap stand,using species richness indices,Simpson diversity indices,Shannon-Wiener diversity indices and Pielou evenness indices,plant diversity in gaps and under closed canopy were compared.The results indicated that：（1） The average area of gaps which were regimed by the natural disturbance was 86.3 m 2 in the natural Quercus liaotungensis community,primarily （accounted for 76.9%） formed by small gaps with the area below 100 m 2.And the main formation of them were breakage at trunk base.（2） There was a significant difference between plant diversity in gaps and under canopy,diversity indices and richness indices were slightly higher in gaps （P 0.05）.（3） Diversity indices,richness indices and evenness indices of arbor and shrub layers were the highest in the size of 75～100 m 2 in gap.But diversity indices and evenness indices of herb layer reached the highest in the size of 0～50 m 2,and richness indices reached the highest in the size of 75～100 m 2 in gap. |
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| Keywords: | plant diversity forest gap Quercus liaotungensis forest the Ziwuling Mountain |
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