森林火灾产物影响植物种子萌发响应机制研究

Response Mechanism of Forest Fire Combustion Products Affecting Plant Seed Germination Wang Hechenyang

全球极端气候变化显著,高温干旱天气增加,导致森林火灾频发,影响生态环境稳定。林火及火后产物作为外源刺激会促进或抑制植物种子的萌发,不同萌发状态影响火后生境质量恢复。文中梳理森林火灾产物与种子萌发实验研究,阐述林火产物组成及物化作用,分析热激、烟熏和火烧灰刺激下不同科属种子发芽率的变化,探究森林火灾产物对植物种子萌发机制的影响及其作用,总结不同条件下种子萌发的响应状态,以期为制定森林火后生境恢复及树种更新策略提供参考。

Significant and catastrophic global climate change results in an increase in high temperature and draught,which has increased the frequency of forest fires,and in turn harmed ecological stability.Forest fires and their combustion products operate as external stimuli that either encourage or impede plant seed germination,and varied states of germination can affect the recovery of post-fire habitat quality.In this study,we review the research on forest fire combustion products and seed germination experiments to describe the combustion product compositions and their chemical effects.We analyze the changes in seed germination rates of various plant families under stimulation from heat,smoke and fire ash,explores the impact of forest fire combustion products on plant seed and its roles,and summarizes the responses of seed germination under different conditions.The findings would provide a theoretical foundation and practical guidance for habit recovery after forest fire and forest species regeneration.