林分状态分析方法在兴安落叶松天然林林分质量评价中的应用

Application of the Stand State Method in Larix gmelinii Natural Forest Quality Evaluation

通过对大兴安岭地区不同类型兴安落叶松天然林样地进行每木定位、调查及分析,从林分结构和林分活力2个方面对林分状态进行描述,基于林分状态对不同类型兴安落叶松天然林质量进行分析评价。结果表明,杜香-兴安落叶松林(ω=0.295)林分状态与其他2种类型林分比较相对较差,林分水平结构、年龄结构以及林分更新3个指标不合理;草类-兴安落叶松林(ω=0.531)林分状态处于中等水平,树种多样性指标不合理;杜鹃-兴安落叶松林(ω=0.500)林分状态处于中等水平,年龄结构、树种多样性和顶极种竞争3个指标不合理。3种不同类型兴安落叶松林的林分质量高低排序为草类-兴安落叶松林>杜鹃-兴安落叶松林>杜香-兴安落叶松林,与以往对这3种林型生产力大小相比较的研究结果一致。

On the basis of setting sample plots at the Larix gmelinii nature forest in Daxing＇an mountains,the states of stands were described by stand structure and stand vigour,from which the quality of different types of L.gmelinii natural forest were estimated.The result showed that the stand state of Ledum-Larix forest（ω=0.295）was the worst,three indicators were unreasonable,including horizontal structure,stand age structure and stand regeneration.The stand state of grass-Larixforest（ω=0.531）was at moderate level,and the indicator of tree species diversity was unreasonable.The stand state of the RhododendronLarixforest（ω=0.500）was at moderate level,and the three indicators were unreasonable,including stand age structure,tree species diversity and climax species competition.The quality of three different types of Larix gmelinii forest was grass-Larixforest〉Rhododendron-Larixforest〉Ledum-Larixforest,which was consistent with previous studies on the productivity of these three forest types.