| 柳杉人工林植物多样性研究 |
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| 引用本文： | 杨举田,陈修权,覃德文.柳杉人工林植物多样性研究[J].防护林科技,2016(7):30-32. |
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| 作者姓名： | 杨举田 陈修权 覃德文 |
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| 作者单位： | 1. 广西国有六万林场,广西 玉林,537000;2. 广西国有三门江林场,广西 柳州,545006;3. 广西大学林学院,广西 南宁,530004 |
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| 摘 要： | 以广西国有六万林场33年生柳杉人工林为研究对象,进行了上、下和中3个坡位的植物多样性调查。研究结果表明:不同坡位林下植物种类多样性表现为中坡下坡上坡;中坡林分的Shannon指数(H′)和Simpson指数(D)分别为2.01和0.93,均为各个林分中最高;柳杉人工林中坡的草本层丰富度指数(Margalef指数)均高于其他坡度的林分,表明了柳杉人工林中坡植物种类丰富,林下光源充足;柳杉人工林灌木层物种均匀度Jsw指数的平均值分为1.580,而草本层物种均匀度Jsw指数平均值为1.487。并得出了伴随着坡位的变化,光照可从林分不同方向透过林分照射于林下植被,可给林下植被提供良好的生长环境,同时也提升了林下植被的多样性。
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| 关 键 词： | 柳杉 坡位 多样性 |
Diversity of Cryptomeria fortune Plantation |
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| Abstract: | Taking 33-year-old Cryptomeriafortune plantation in the state-owned Guangxi Liuwan Forest Farm as the research obj ect,diversity of uphill,middle slope & downhill slope were investigated.Result shows that the di-versity of different slope positions in understory plant species are:the middle slope> downhill slope> uphill.The Shannon index (H′)and Simpson index (D)of stand of mdddle slope is 2.01 and 0.93,respectively,are the highest in each stand;richness index of herb layer in middle slope of C.fortune plantation (Margalef index)is higher than that of other slope;indicating that the species is rich for C.fortune plantation;light source understory is adequate;the mean value of species evenness (Jsw)of shrubs for C.fortune plantation is 1.580,and the mean value of species evenness (Jsw)of herb layer is 1.487.Accompanied by changes of slope positions in woodland,the sun shines the understory vegetation through stand,which can provide optimal growing environment,at the same time it can en-hance the diversity of understory vegetation. |
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| Keywords: | Cryptomeriafortune slope position diversity |
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