| 摘要: |
| 【目的】对福建将乐林场常绿阔叶林天然更新幼苗幼树进行分析与评价，为当地常绿阔叶林的经营提供参考依据。【方法】在福建将乐林场常绿阔叶林内设置有代表性的样地19块，按照苗高≤30 cm（Ⅰ级）、＞30～≤60 cm（Ⅱ级）、＞60～≤100 cm（Ⅲ级）、＞100～≤200 cm（Ⅳ级）、>200 cm且胸径≤7.5 cm（Ⅴ级）的分级标准，将更新幼苗幼树划分为小苗（Ⅰ，Ⅱ级）、大苗（Ⅲ，Ⅳ级）和幼树（Ⅴ级）；采用方差/均值和4种聚集度指标检验林分及各等级更新幼苗幼树的空间分布格局，选择平均密度、平均地径和平均盖度3个指标，采用因子分析法进行综合评价。【结果】林分及各主要树种更新幼苗幼树密度随等级增大而减少，更新密度最大的为黄瑞木(Adinandra mellettii)；各树种空间分布格局均呈聚集分布，不同树种聚集程度不同，其中黄瑞木聚集程度最强，木荷（Schima superba）最弱；天然更新效果最好的是黄瑞木，最差的是栲树（Castanopsis fargesii）。【结论】将乐林场常绿阔叶林主要树种的更新幼苗空间格局均呈聚集分布，同一树种不同发育阶段聚集强度存在差异。随着常绿阔叶林的演替，栲树等树种有发展成群落主要树种的趋势；但由于当地常绿阔叶林受到严重干扰，栲树更新状况不佳。 |
| 关键词: 福建将乐林场 常绿阔叶林 空间结构 幼苗更新 |
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| 基金项目:“十二五”国家科技支撑计划项目“南方集体林区生态公益林可持续经营技术研究与示范”（2012BAD22B05） |
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| Structure analysis and evaluation of seedlings in evergreen broad-leaved forest in Jiangle Forest Farm,Fujian |
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LI Jie,GAO Xiang,XU Guang,et al
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| Abstract: |
| 【Objective】This study analyzed and evaluated the natural regeneration seedlings of evergreen broad-leaved forest in Jiangle Forest Farm,Fujian,to improve the management of evergreen broad-leaved forest.【Method】19 representative plots in evergreen broad leaved forest in the study area were set,according to height≤30 cm (grade Ⅰ),>30-≤60 cm (grade Ⅱ),>60-≤100 cm (grade Ⅲ),>100-≤200 cm (grade Ⅳ),and >200 cm and diameter≤7.5 cm (grade Ⅴ),and regeneration seedlings were divided into three groups,seedlings (grade Ⅰand Ⅱ),large seedlings (grade Ⅲand Ⅳ) and saplings (grade Ⅴ).The spatial distributions of stands and seedlings were analyzed using ratio method and four intensity index methods.The growth status of the seedlings were evaluated using the factorial analysis method considering three factors,mean density,mean ground diameter and mean coverage.【Result】The number of seedlings of forest stand and each major species decreased as the increase of grade.The regeneration seedlings of Adinandra mellettii were the most.All seedlings aggregated distributed with different aggregation intensities,among which,A.mellettii was the best while Schima superba was the worst.A.mellettii had the best regeneration evaluation results while Castanopsis fargesii had the worst.【Conclusion】Major regeneration seedlings of evergreen broad-leaved forest showed an aggregated distribution in Jiangle Forest Farm,Fujian.The same species at different developmental stages had different aggregation intensities.With the succession of evergreen broad-leaved forest,C.fargesii and other tree species would be the main tree species of the community.However,because of severe anthropogenic interference to local evergreen broad-leaved forest,C.fargesii regeneration was in poor condition. |
| Key words: Jiangle Forest Farm,Fujian evergreen broad-leaved forest spatial distribution seedling regeneration |
