Diameter structure and spatial distribution pattern of Platycladus orientalis plantation in Beijing mountain area
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摘要: 利用径级结构、空间分布格局、混交度和大小比等4个指标来分析北京十三陵林场人工侧柏Platycladus orientalis林公顷级样地的结构与空间分布格局。结果表明：①十三陵人工侧柏林胸径分布呈截尾正态分布，Ⅰ级和Ⅱ级个体占总株数的82.6%；②群落中侧柏种群呈高度集群分布，聚集度随胸径增长而下降；③全林的混交程度较低，平均混交度为0.15。各树种混交度侧柏为最低，其他伴生树种混交度以中度、强度和极强度为主；④优势种侧柏和大部分伴生树种大小比表现为劣态或绝对劣态。图1表4参15Abstract: Four indexes（diameter structure，spatial distribution pattern，mingling，and neighborhood comparison） were used to analyze the spatial structure and spatial distribution pattern of the Platycladus orientalis plantation in Ming Tombs Forest Farm. The results showed that：1） Diameter distribution of the P. orientalis plantation revealed truncated normal distribution. The quantity of grade I and II was about 82.6% of the total plants. 2） The P. orientalis population of the community revealed highly clumped pattern. The aggregation degree was decreasing with the diameter increasing. 3） The average mingling value of the whole stand was 0.15，which was at a low level. The P. orientalis population had the lower mingling value then other populations. The mingling values of the associated tree species presented almost moderate，intensity and high intensity. 4）The value of neighborhood comparison of the population of P. orientalis and most of the associated tree species presented almost inferiority and absolutely inferiority.［Ch，1 fig. 4 tab. 15 ref.］
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Key words:
- forest management /
- Platycladus orientalis /
- plantation /
- structure /
- Beijing mountain area
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2010.01.005
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