摘要
近自然改造对于调整云南松人工林层次结构、改善林内物种组成和生境条件、促进林分向天然林群落结构演化具有重要作用。本试验对近自然改造4年的云南松人工林、对照林分及天然次生林的群落结构和物种组成进行了研究,分析探讨了云南松人工林近自然化改造的初步结果和存在问题。结果表明:近自然改造后,林分密度降低,乔木层云南松的重要值下降,林分混交度提高;灌木层更新种类增多,多样性增加;草本层物种多样性变化不大;近自然改造促进云南松人工林物种多样性增加,群落结构向天然次生林方向演化。
Near nature modification plays a significant role in adjusting structure, improving species composition and promoting evolution to natural forest for artificial forest of Pinus yunnanensis. Based on analysis of artificial forest plot, near-natural modification plot after 4 years and secondary forest of the same age plot of Pinus yunnanensis, the results showed that the density and the important value of artificial forest of Pinus yunnanensis both reduced. In shrub layer, the renewal kinds were more abundant and the forestry diversity increased whereas in herb layer changed little. On the whole, it enhances the diversity of artificial forests by evolving into natural secondary forests.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2010年第3期72-77,共6页
Journal of Hebei Agricultural University
基金
国家"十一五"科技支撑项目"天然林区人工林近自然化改造技术"专题(2006BAD03A04-03)
关键词
近自然改造
群落结构
物种多样性
云南松人工林
near-natural modification
community structure
biodiversity
artificial forest of Pinus yunnanensis
