马尾松-湿加松混交林与马尾松纯林生长量及林下植被特征分析

黄欣宇; 黄春晖; 聂锦燕; 叶锦培; 邓文军; 蒋维昕

doi:10.3969/j.issn.1001-3776.2022.04.005

马尾松-湿加松混交林与马尾松纯林生长量及林下植被特征分析

Growth and Understory Vegetation Characters of Mixed Plantation of Pinus massoniana and P. elliottii × caribaea and Pure P. massoniana Plantation

摘要

摘要: 对苍梧县国有天洪岭林场12 年生马尾松Pinus massoniana（桐棉种源）-湿加松P. elliottii ×P. caribaea 人工混交林及桐棉种源、土贡种源马尾松人工纯林进行调查分析，研究种源、林分类型对林木生长量以林下植被特征的影响。结果表明：马尾松-湿加松混交林的树高生长量显著高于桐棉种源、土贡种源马尾松纯林（P < 0.05）；马尾松-湿加松混交林中树木的平均胸径（14.96 cm）与土贡种源马尾松纯林（15.06 cm）相当，但显著低于桐棉种源马尾松纯林（15.90 cm）（P < 0.05）；马尾松-湿加松混交林与桐棉种源马尾松纯林在单株材积上无显著差异（P ? 0.05），但优于土贡种源（P < 0.05）；马尾松-湿加松混交林内马尾松的生长显著优于湿加松；从多样性指标均值看，混交林灌木层植被的多样性较纯林高。综上，营建马尾松-湿加松混交林在林分生长及林下植被多样性维持方面均优于马尾松纯林，且桐棉种源马尾松相对土贡种源马尾松及湿加松均具有显著生长优势。本研究结果为马尾松人工林的经营提供了一定参考。

Abstract: In March 2006, 1-year bare-root seedlings of different provenances of Pinus massoniana and P. elliottii × caribaea were planted under three group on the same slope in State-owned Tianhongling Forest Farm, Cangwu, Guangxi. Stand of pure P. massoniana (Tongmian provenance, TM), pure P. massoniana (Tugong provenance, TG), mixed TM and P. elliottii × caribaea (MIX) formed 3 groups. In 2018, quadrat investigations showed that height growth of MIX was significantly higher than that of two pure stands (P < 0.05). There was no significant difference of individual tree volume between MIX and TM, but obviously higher than that of TG. Growth of P. massoniana was better than that of P. elliottii × caribaea in the MIX. Shrub layer diversity under MIX had higher values than that under pure stands.

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