整地干扰对人工林植物多样性的影响

本文通过对不同造林方式培育的人工森林群落的样方调查和多样性分析,探讨不同整地干扰强度对森林群落不同层次植物多样性的影响。结果表明：（1）造林整地方式对群落植物多样性有显著的影响,其中穴状造林整地培育的森林群落具有最高的植物多样性;（2）整地方式对群落不同层次植物多样性影响不同,其中对草本层的影响最大;（3）草本层对整个群落的植物多样性贡献率最大。建议在中亚热带阔叶林区植被恢复与重建过程中,适宜采用穴状整地或封山育林方式以保育生物多样性。

Disturbance of Site Preparation on Plant Diversity of Plantations

Based on the survey of artificial forest communities cultivated by different afforestation methods,an analysis was made of the disturbance of site preparation on plant species diversity.The results indicated that the site preparation had a significant impact on plant species diversity of communities.The ＂delve-type＂ site preparation showed most obvious disturbance on plant species diversity,with a highest plant species diversity.Effects of the site preparation on plant species diversity changed with the layers of forest communities.The most significant disturbance occurred in the herb layer.The herb layer had the greatest contribution to the plant species diversity of community.It was suggested in the context of biodiversity that the ＂delve-type＂ site preparation should be a better afforestation method in the middle subtropical broad-leaved forest area.