浙江淳安古树资源调查与分析

采用平板电脑实地开展浙江淳安古树资源调查,对资源总量、古树树种、生长因子和分布格局等特征进行分析。结果表明：1)淳安共有古树4744株,其中,散生古树2260株,古树群古树2484株;按保护级别分,一级古树294株,二级古树946株,三级古树3504株。2)古树隶属于39科65属96种,起源古老残遗成分多,地理成分多样,分布型以热带和温带为主,中国特有成分少,珍稀树种古树有10种459株。3)古树树高区段10-25m共3865株占81.47%,胸围区段100-399cm共3979株占83.38%,平均冠幅区段5-14.99m共3256株占68.63%;年龄区段100-299年共3504株占73.86%,树龄1000年以上古树15株。4)古树水平分布以淳安西南和西部数量最多,乡镇分布以汾口镇古树最多,垂直分布海拔区域100-200m古树2107株占44.41%。

Investigation and analysis of ancient tree resourcesin Chun"an County Zhejiang Province

Field Investigation of Ancient Tree Resources in Chun"an, Zhejiang Province by Tablet Computer, The characteristics of total resources, ancient tree species, growth factors and distribution pattern were analyzed. The results show that: 1)There are 4744 ancient trees in Chun"an, Among them, there are 2,260 scattered ancient trees and 2,484 ancient trees in ancient trees; According to protection level, There are 294 first-class ancient trees, 946 second-class ancient trees and 3504 third-class ancient trees. 2)Ancient trees belong to 39 families, 65 genera and 96 species, There are many ancient remnants of origin, Geographical elements are diverse, The distribution patterns are mainly tropical and temperate, There are few unique ingredients in China, There are 459 rare and rare ancient trees of 10 species. 3)There are 3865 ancient trees in the height range of 10-25m, accounting for 81.47%, A total of 3979 plants (83.38%) in the chest circumference section of 100-399cm, A total of 3256 plants (68.63%) with an average crown width of 5-14.99 m; There were 3504 plants in the age range from 100 to 299, accounting for 73.86%, 15 ancient trees over 1000 years old. 4)The horizontal distribution of ancient trees is the largest in southwest and west of Chun"an, Fenkou Town has the most ancient trees in villages and towns, There are 2107 ancient trees with vertical distribution of 100-200m above sea level, accounting for 44.41%.