摘要
2017年6-8月,通过资料收集和实地调查,对长兴县古银杏资源的分布和结构特征进行分析。结果表明,长兴县古银杏有4047株,分布较集中,主要位于小浦、煤山、林城3个乡镇;树龄100~1200 a,集中于100~300 a,有3819株,占全县古银杏总株数的94.37%;树高6~35 m,集中于10~20 m,共2945株,占全县古银杏总株数的72.77%;胸围0.80~7.52 m,集中于1.0~2.0 m,共3234株,占全县古银杏总株数的79.91%;平均冠幅5~28 m,集中在10 m以下,共2528株,占全县古银杏总株数的62.46%;古银杏树龄(Y)与测围(S)存在线性关系,Y=0.0718S(R^2=0.9702)。
Field investigations were carried out on distribution and structural characteristics of Ginkgo biloba with age of more than 100 years in Changxing county,Zhejiang province during June and August of 2017.In March of 2018,detection was implemented on 20 G.biloba individuals random selected from above-mentioned trees.The results showed that 4047 ancient G.biloba in Changxing county concentrate distributed,with age ranged from 100 to 1200 years,among them,3819 ones with age of 100-300 years,accounting for 94.37%of the total.Their height varied from 6 m to 35 m,2945 trees were in 10-20 m,about 72.77%of the total.The perimeter at breast height of 3234 ancient trees was concentrated in 1.0-2.0 m,accounting for 79.91%of the total.The average crown diameter of 2528 trees was less than 10 m in a range from 5 to 28m,about 62.4%of the total.Determination of age of 20 ancient trees demonstrated that there was a great difference with estimated one,reached 500.82 year.It found that there was a linear relationship between age of ancient trees(Y)and perimeter at breast height(S),Y=0.0718 S(R^2=0.9702).
作者
刘政
胡孙田
李颖
朱培
褚旭东
孙勇
LIU Zheng;HU Sun-tian;LI Ying;ZHU Pei;CHU Xu-dong;SUN Yong(Changxing Forestry Bureau of Zhejiang,Changxing 313100,China;Huzhou Forestry Institute of Zhejiang,Huzhou 313000,China)
出处
《浙江林业科技》
2019年第6期87-91,共5页
Journal of Zhejiang Forestry Science and Technology
关键词
古银杏
树龄检测
资源特征
长兴县
ancient Ginkgo biloba
tree age detection
resource characteristic
Changxing
