“古树是活着的古董,是有生命的国宝”,一种不可再生的历史资源。目前对于古树还没有具体和权威的界定,只在长期的活动中,形成了一个比较统一的认识:古树是指树龄在100年以上的树木,按树龄分为一级和二级,树龄在300年以上的为一级,其余为二级。大树一般是指胸径15厘米以上的落 “Old trees are living antiques, life-long national treasures,” a non-renewable historical resource. At present, there is no specific and authoritative definition of ancient trees. Only a long-term activity has formed a relatively unified understanding: the ancient trees refer to the trees more than 100 years old, divided into first and second grades by age, In 300 years of more than one, the rest is two. Tree generally refers to the diameter of 15 cm or more fall