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首页> 外文期刊>Journal of Forest Planning >The Analysis of Stand Structure and Growth Characteristics of Natural Forest in Papua New Guinea
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The Analysis of Stand Structure and Growth Characteristics of Natural Forest in Papua New Guinea

机译：巴布亚新几内亚天然林的林分结构和生长特性分析

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This paper discusses the stand structure and growth characteristics of twenty one-hectare plots in selectively cut natural forests in Papua New Guinea. The research sites are Ari, Hawain, Iva Inika. Serra, Sogcram, Manus, Gumi and Vudal. These plots were re - measured to analyze changes in stand structure and growth. Tree species were grouped according to their regenerative characteristics into three species groups, (I) Primary species (P), (II) Secondary species (S) and (III) Primary/Secondary species (P/S). It was found that total diameter distribution showed an exponential decrease pattern from a lower DBH class to a higher DBH class. This pattern is true for P and P/S species, however S species showed high growth in the lower DBH class (P>P/S>S). Recruitment was mostly from P and S species and was high in Vudal plots, while mortality was mostly from P and P/S species. Fire and logging damage was the main cause of mortality. BA gain in Vudal 2 and Serra 2 had the highest increase of 2.34 and 2.09m~2/ha respectively. Gumi 3 and 4 had a high lost of 7.32 and 15.15m~2/ha respectively. Generally high diameter growth for P and P/S species was found to be at a DBH class of 20 to 50cm, high growth for S species was encountered to be at a 10 to 15cm DBH class in most of the plots studied. P/S and S species showed slightly higher growth than P species. Three types of natural forests were proposed from this study based mostly from the diameter transition pattern after selective cutting system. Type I showed an increasing trend from a lower DBH class to upper classes in stands at Ari, Hawain, Serra, Gumi and Manus. Type II showed a decreasing trend from a lower DBH class to an upper class at stands in Iva Inika and Sogeram. Type III showed the highestincrease in the lower DBH class with mostly S species going from low to upper classes in stands at Vudal.
机译：本文讨论了在巴布亚新几内亚选择性砍伐的天然林中二十一个公顷土地的林分结构和生长特征。研究地点是Ari，Hawain，Iva Inika。 Serra，Sogcram，Manus，Gumi和Vudal。重新测量了这些地块，以分析​​林分结构和生长的变化。根据树种的再生特性将其分为三个树种组：（I）第一树种（P），（II）第二树种（S）和（III）第一树种/第二树种（P / S）。发现从较低的DBH等级到较高的DBH等级，总直径分布显示出指数减小模式。对于P和P / S物种，这种模式是正确的，但是，在较低的DBH类中，S物种显示出高的生长（P> P / S> S）。招聘主要来自P和S物种，在Vudal地块的招聘很高，而死亡率则主要来自P和P / S物种。火灾和伐木破坏是造成死亡的主要原因。 Vudal 2和Serra 2的BA增幅最高，分别为2.34和2.09m〜2 / ha。龟尾3号和4号分别损失了7.32和15.15m〜2 / ha。通常，在大多数研究样区中，P和P / S物种的高直径生长在20至50cm的DBH级，S物种的高直径生长在10至15cm DBH级别。 P / S和S物种的生长略高于P物种。这项研究提出了三种类型的天然林，主要是基于选择性采伐后的直径过渡模式。在Ari，Hawain，Serra，Gumi和Manus的看台中，I型表现出从低DBH到上层的增长趋势。在伊娃·伊尼卡（Iva Inika）和索格拉姆（Sogeram）的看台上，II型表现出从低DBH级到高级级的下降趋势。 III型表现出在低DBH类中增幅最大，在Vudal的林分中，大多数S物种从低类到高类。

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