河口人工肉桂资源分布现状及更新能力分析

Analysis of the Resources Distribution and Regeneration Capacity of Artificial Cinnamomum cassia Presl in Hekou,Yunnan

河口是中国最适合肉桂生长的几个地区之一。从20个世纪50年代以来,肉桂曾经是科学研究和产业开发的热点,也有过几次大规模的发展,取得了一定的成就。然而,随着社会经济的发展,肉桂种植利润的下降,科研关注点的转移,人们逐渐退出对肉桂的经营,肉桂被其他热带作物替代;其次,城镇化的发展,基建用地的侵占,都使肉桂资源大面积的被破坏。本文根据调查结果,总结了目前河口人工肉桂资源的分布现状,然后,对现存人工肉桂的自然更新能力开展调查研究。结果表明:现存人工肉桂林自然更新能力差,更新方式有种子更新和萌生更新同时存在;林中以萌生更新为主;林缘地带有种子更新,但都"只见苗,不成树"。无论以哪种更新方式都无法有效地实现种群更新和扩大。

Hekou is one of the most suitable areas for the growth of Cinnamomum cassia Presl in China.Since the 1950 s, it had once been a hot spot in scientific research and sectoral development, and witnessed several large-scale developments and certain achievements. However, with the development of economy and society, the decline of the profit of C. cassia planting, and the shifting of its scientific research, people were gradually withdrawn from the operation of C. cassia which was replaced by other tropical crops.Moreover, the development of urbanization and the encroachment of capital construction land caused destruction of a large area of cinnamon resources. The distribution status of C. cassia Presl resources was reviewed and a field survey was made of the natural regeneration capacity of C. cassia Presl in Hekou.The results showed that natural regeneration capacity of the existing artificial C. cassia was poor with the patterns of regeneration by either seeds or coppicing. Coppicing regeneration dominated in the forest;seed-based regeneration was found in the forest edge, but only seedlings without any mature trees. These two regeneration ways could not effectively help to regenerate and expand the population of C. cassia Presl.