古树名木是一种重要的自然和文化遗产，具有非常重要的科学价值和开发应用价值。北京市的古树名木资源十分丰富。选取了松科中的一级古树12棵油松、4棵白皮松，以及银杏科中一级古树6棵银杏，对其生长、环境和保护状况进行了详细调查分析。用ICP-MS法测定了树皮中的Mg、Ca、Mn、Fe、Cu、Zn、Mo等7种植物生长必需元素，以及Cr,As,Cd和Pb等4种与环境相关元素的质量分数。结果表明:这些古树名木多数生长状况一般，其生长状况与环境间的关系明显，树皮中所含的必需元素在相同的地点的不同古树的个体间差异显著以及相同种的古树在不同的地点也差异显著，与环境相关的元素在树种和分布地点间区别明显。整理和收集了相关古树的各种传说和轶闻，挖掘了古树的文化价值。同时，对北京古树现在的许多保护措施进行了分析，并提出了进一步改进的建议。

As a kind of important nature and culture heritage, ancient and famous trees are greatly valuable in research and exploitation. The city of Beijing is much rich in ancient and famous trees. Thus, 12 Pinus tabulae formis Carr and 4 P. bungeana Zucc. Ex Endl. the first class ancient and famous trees and 6 Ginkgoaceae ones are chosen and their situations of growth, environment and protection are carefully invested. Mg,Ca,Mn,Fe,Cu,Zn and Mo which are related to the growth of plants and Cr,As,Cd and Pb which are related to environment in these barks are detected by ICP-MS. According to the results, these Ancient and famous trees grow well, the relationship between their growth and environiment is obvious and the differences on the elements related to plant growth between species and on the elements about environment in various species and spots are both obvious as well. Furthermore, various kinds of legends about ancient trees are collected and get the ancient trees culture value.