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| 庞泉沟次生混交林主要种群年龄结构和空间格局研究 | |
| 引用本文： | 张伟,郝青云,任俊义,杨慧滨,张芸香.庞泉沟次生混交林主要种群年龄结构和空间格局研究[J].山西农业大学学报(自然科学版),2002,22(1):50-53,71. |
| 作者姓名： | 张伟 郝青云 任俊义 杨慧滨 张芸香 |
| 作者单位： | 1. 山西农业大学,林学院,山西,太谷,030801 2. 山西省临汾市尧都区,林业局,山西,临汾,041000 3. 山西省隰县,种子园,山西,隰县,041300 4. 山西省晋中市,苗圃,山西,晋中,030700 |
| 基金项目： | 国家自然科学基金项目 (3 0 0 70 60 5 )，山西省自然科学基金 (2 0 0 0 10 90 ) |
| 摘 要： | 通过样带调查法结合Greig -smith的等级方差分析法 ,对庞泉沟自然保护区两类次生混交林主要种群年龄结构和空间格局进行了研究。对主要种群年龄结构的分析表明 :桦木混交林是相对异龄林 ,林下更新不良 ;云杉混林是复层异龄林 ,林下更新良好 ;并且云杉的更新是一个相对间断的过程 ,两个世代间隔大约 5 0年。对各种群空间格局分析表明 :云杉的聚集强度最强 ;桦木也呈集群分布 ,但聚集程度较弱 ;落叶松呈随机分布。在此基础上分析了各种群聚集的格局规模 ,并探讨了主要种群年龄结构与其空间格局之间的关系 |
| 关 键 词： | 年龄结构 空间格局 等级方差分析法 格局规模 |
| 文章编号： | 1671-8151(2002)01-0050-04 |
Age Structure and Spatial Pattern of Main Populations in Secondary Mixed Forest in Pangquangou |
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| ZHANG Wei et al..Age Structure and Spatial Pattern of Main Populations in Secondary Mixed Forest in Pangquangou[J].Journal of Shanxi Agricultural University,2002,22(1):50-53,71. | |
| Authors: | ZHANG Wei |
| Abstract: | Age structure and spatial pattern of main populations in two types of secondary mixed forest in pangquangou,national natural reserve are studied by the method of sampling belt investigation and hierarchical analysis of variance that was put forward by Greig-smith. The analysis of age structure to main population indicates that mixed forest of Betula platyphylla and B. albo-sinensis are relatively uneven age stands and the number of their young trees are less; mixed forest of Picea wilsonii and P. meyeri are multi-layers uneven age stands. The number of their young trees is the most; moreover, their rebirth is relatively disconnected.It is about 50 years between two generations. The analysis of spatial pattern to main population indicates that assemble density of Picea wilsonii and P. Meyeri are the greatest; the distribution of Betula platyphylla and B. albo-sinensis is also assembling, but the density is inferior. The distribution of Larix principis-rupprechtii is random.Based on this, patches size of main population is analyzed and the relation between main populations age structure and their spatial pattern is discussed. |
| Keywords: | Age structure Spatial pattern Hierarchical analysis of variance Pattern scale |
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