Dependences of longleaf pine （Pinus palustris） natural reproduction on environments above ground

We studied relations between natural seedling reproduction and above ground environment in a longleaf pine ecosystem. Forty-eight 0.05 ha circular plots were sampled under single-tree selection, group-tree selection and control stands in three main longleaf pine areas in south Alabama, USA. We measu...

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Bibliographic Details
Published in:林业研究：英文版 2014, Vol.25 (3), p.565-570
Main Author: Qiuju Guo Dexiang Wang Xunru Ai Lan Yao
Format: Article
Language:English
Subjects:
叶松
地上
林分密度
沼泽
环境因素
自然繁殖
郁闭度
阿拉巴马州
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Summary:We studied relations between natural seedling reproduction and above ground environment in a longleaf pine ecosystem. Forty-eight 0.05 ha circular plots were sampled under single-tree selection, group-tree selection and control stands in three main longleaf pine areas in south Alabama, USA. We measured six above-ground environment factors, viz. canopy closure, stand density, basal area, average tree height, understory cover and PAR under canopy. We employed forward, back-ward and stepwise selection regression to produce one model. Three main variables：canopy closure, stand density and basal area, were left in the model; light, PAR and understory cover were not incorporated into the model at the 0.10 significance level. Basal area was a positive pa-rameter, while canopy closure and stand density were negative parame-ters. Canopy closure was the main parameter in the model. The model proved to be meaningful, and has potential to provide useful guidance for future work.
ISSN:1007-662X
1993-0607