江西红壤地区马尾松的年轮与其根部土壤中化学元素含量的相关性研究

STUDY ON CORRELATION BETWEEN CHEMICAL ELEMENT CONTENTS IN THE ANNUAL RING OF MASSON PINE TREE AND THOSE IN SOILS NEAR TREE ROOTS IN RED SOILS AREA OF JIANGXI PROVINCE

对采自江西红壤地区的六株马尾松的圆盘年轮样及它们当年的根部土壤，进行Al，P，Fe，Co，Cu，Zn，Ba，Pb等元素含量分析。实测结果表明年轮元素含量的分布平均值C（Z）与当年根部土壤中元素含量的分布平均值C（Z）之间存在统计相关性，并满足对数线性相关模式：其中Z是元素原子序数，用以表征不同化学元素；统计回归系数a、b和元素、树种、气候因子以及土壤类型有关。因此，年轮元素含量时间（年份）序列C（Z，t；）可反映根部土壤中元素含量C’（Z，ti）的逐年变化，即再现环境的历史演变。

The annual rings of six Masson pine trees and the soils near the tree roots were sampled from the red soil area in Jiangxi Province for the determination of Al, P, Fe, Co, Cu, Zn, and Ba contents. Results showed that the relationship betWeen C (z,t) and C'(z,t) followed the logarithmic linear correlation model:lgC' (z, t) = a(z) + b(z)lgC(z, t),where z is atomic number of element a and b are coefficients, which are related to chemical elementS, tree species, climatic factor and soil types. Based on mis model the dynamic changes of chemical element contents in soils could be reflected by those in the growth rings of tree.