| 杨凌乔灌草型绿地植物群落空间结构特征 |
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| 引用本文： | 童明坤,王迪海,洪森先,陈婕,穆佳,王定.杨凌乔灌草型绿地植物群落空间结构特征[J].陕西林业科技,2011(3):39-43. |
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| 作者姓名： | 童明坤 王迪海 洪森先 陈婕 穆佳 王定 |
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| 作者单位： | 西北农林科技大学林学院,陕西杨凌,712100 |
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| 基金项目： | 大学生创新试验计划校重点项目 |
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| 摘 要： | 对杨凌示范区绿地密度、间距、覆盖度3项水平结构指标,乔灌草比例、林层比2项垂直指标,树种丰富度、多样性等树种组成结构指标等进行测定。树种丰富度、多样性、均匀度和单调度分别采用Margalef指数（R）、Shannon-Wiener指数（H）、Pielou指数（J）和Simpson指数（M）,从整个样地,样地乔木层和灌木层3个方面分别计算。结果表明：10个样地的植株密度较为合理;聚集指数R表明各样地植株都属于均匀分布;西北农林科技大学南校区和教嫁园的覆盖度较好;各样地乔灌草比例不尽合理;西北农林科技大学北校区和水保所的林层比较好;各样地的R值为0.985 4～3.40 29,H值为1.054 9～2.231 6,J值为0.693 1～0.968 8,M值为0.125 0～0.413 6。
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| 关 键 词： | 杨凌示范区绿地 水平结构 垂直结构 树种组成结构 |
Spatial Structure Characteristics of Plant Communities Consisting of Trees,Shurbs and Grass in Yangling |
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| TONG Ming-kun,WANG Di-hai,HONG Sen-xian,CHEN Jie,MU Jia,WANG Ding.Spatial Structure Characteristics of Plant Communities Consisting of Trees,Shurbs and Grass in Yangling[J].Shaanxi Forest Science and Technology,2011(3):39-43. |
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| Authors: | TONG Ming-kun WANG Di-hai HONG Sen-xian CHEN Jie MU Jia WANG Ding |
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| Institution: | TONG Ming-kun,WANG Di-hai,HONG Sen-xian,CHEN Jie,MU Jia,WANG Ding(College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100) |
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| Abstract: | Three horizontal indicators(the density,spacing distance,cover degree of green area),two vertical indicators(the proportion of arbors,shrubs,herbs and of canopy) and structural indicators(the richness,diversity of trees) during the survey in Yangling were determined.The richness,diversity,uniformity,monotonous level are calculated respectively according to Margalef index(R),Shannon-Wiener index(H),Pielou index(J) and Simpson index(M) from 3 levels of the whole sampling plot,tree layer and shrub layer in the... |
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| Keywords: | Greenbelt of Yangling demonstration zone horizontal structure vertical structure floristic composition structure |
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