建始县古树资源现状及特征研究

Research on the Current Situation and Characteristics of Ancient Tree Resources in Jianshi County

古树是大自然馈赠人类的重要遗产。建始县全面开展了古树资源调查,涉及古树树种、树龄、资源分布、生长状况、保护等级、环境因子以及古树管理等方面。结果表明:建始县现挂牌古树名木595株,隶属28科53属95种,其中被子植物23科42属83种,裸子植物5科9属12种。壳斗科Fagaceae为优势科。属于国家一级保护植物4种,二级4种。现有1级古树41株(6.9%)、二级119株(20.0%)、三级435株(73.1%);古树在不同乡镇分布数量差异较大;古树多集中在中山和低山区域,中山分布数量最多,低山分布数量较多,丘陵地带分布最少。坡位、坡向和海拔决定环境条件,优越环境对古树生长有显著促进作用。

Ancient trees are an important heritage that nature bestows on mankind.Jianshi County conducted a comprehensive survey of ancient tree resources,involving ancient tree species,tree age,resource distribution,growth status,protection level,environmental factors,and ancient tree management.The results showed that there were 595 ancient trees listed in Jianshi County,belonging to 28 families,53 genera and 95 species.Among them,there are 23 families,42 genera and 83 species of angiosperms,as well as 5 families,9 genera and 12 species of gymnosperms.Fagaceae is the dominant family.There were 4 national first-class protected plants and 4 second-class protected plants.There were 41 Grade I ancient trees(6.9%),119 GradeⅡtrees(20.0%),and 435 GradeⅢtrees(73.1%);the distribution of ancient trees in different township was quite different.Most of the ancient trees are concentrated in the middle and low mountains,with the largest distribution in the middle mountains,more in the low mountains,and the least in the hilly areas.Slope position,aspect and altitude determine the environmental conditions,and the favorable environment has a significant impact on the growth of ancient trees.