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首页> 外文期刊>Journal of Forest Planning >Change of Spatial Structure Characteristics of the Forest in Oshiba Forest Park in 10 years
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Change of Spatial Structure Characteristics of the Forest in Oshiba Forest Park in 10 years

机译：大芝森林公园10年的森林空间结构特征变化

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摘要

Traditional parameters of forest structure could not meet the need of modern forest management completely. In order to know change law of forest structure in a given period, based on the survey on forest status, spatial structure characteristics of the forest dominated by Pinus densiflora and Chamaecyparis obtusa in 1999 and 2009 were studied by four spatial structure indices of mingling, angle index, neighborhood comparison and opening degree. The results indicated that: Species richness increased somewhat with seven species in 2009 while four species in 1999. The diameter class of Pinus densiflora was not continuous due to lack of small trees, whereas other species were small trees except for Chamaecyparis obtusa. The average mingling was 0.316 and 0.567 respectively in 1999 and 2009, indicating that mixed degree between species from middle-mixed developed into high-mixed level. The distribution pattern of all trees from regular became random. However, neighborhood comparison was 0.456 and 0.474respectively in the two periods, showing the ratio of the trees whose growth was in oppressed status increased somewhat. And the average opening degree decreased from 0.393 to 0.304, indicated that growth space of most trees were in inadequate conditionin 2009. From succession, Pinus densiflora will disappear from the stand finally, while Chamaecyparis obtusa will continue to be in dominance in competition between species. Most of broad-leaved species are in disadvantage at present, and effective measures need to take to protect successful growth of them. Finally, possible operation plan for the forest was discussed.
机译：传统的森林结构参数不能完全满足现代森林管理的需要。为了了解一定时期内森林结构的变化规律，在对森林现状进行调查的基础上，通过四个空间，角度和角度的混合指数，研究了1999年和2009年以松果和樟子松为主的森林的空间结构特征。指标，邻域比较和开放度。结果表明：物种丰富度在2009年有7种，而在1999年为4种。由于缺乏小乔木，松树的直径类别不连续，而其他物种是小乔木（Chamaecyparis obtusa）。 1999年和2009年的平均混合度分别为0.316和0.567，表明中混合种之间的混合度发展到高混合水平。所有树木的分布模式从常规变为随机。然而，两个时期的邻里比较分别为0.456和0.474，表明处于被压迫状态的树木比例有所增加。平均开放度从0.393下降到0.304，表明大多数树木在2009年的生长空间不足。从演替起，松树最终将消失，而Chamaecyparis obtusa将继续在种间竞争中占主导地位。目前大多数阔叶树种处于不利地位，需要采取有效措施保护它们的成功生长。最后，讨论了可能的森林经营计划。

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