浙江大盘山七子花萌枝特性及其对种群更新的影响

在对浙江大盘山自然保护区七子花群落全面踏查的基础上,深入调查了七子花种群内萌枝更新特性。结果表明,七子花根颈处多有萌枝产生,萌枝对七子花种群的径级结构具有较大影响。相关性分析表明,萌枝数与平均根径呈显著正相关。从高度来看,七子花集中分布在4～6 m,在高度竞争上处于劣势。然而其平均冠幅均在5 m2以上,说明七子花通过增加冠幅提高自身的生态位和竞争力。由于七子花有性繁殖较差,群落生境恶劣,导致七子花主要以萌枝方式来维持种群生存。最后,对七子花的保护提出了相关建议。
Heptacodium miconioides, an endemic species in China, is recognized as grade Ⅱ in the list of national key conservation rare and endangered plants. Based on the data collected from sample plots, the population regeneration features in Dapanshan National Natural Reserve of Zhejiang Province were analyzed. The results showed that most of the stem base possessed the sprouting. The sprouting contributed great to diameter classes structure in popunation. The significant positive correlation was presented between the number of sprouting and diameter of root. The heights of most individuals of H. miconioides were between 4 and 6 m, which were oppressed at height competitiveness. However, H. miconioides increased its niche and competitive power by increasing the canopy. The poor sexual reproduction ability and the severe habitat led sprouting regeneration to be the main way of sustaining population survival. Finally, protection measures were proposed