Pedosphere 8(4): 377--380, 1998
ISSN 1002-0160/CN 32-1315/P
©1998 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Average values and angular distribution of element contents in tree rings
KE Xiao-Kang1, QIAN Jun-Long2 and KE Shan-Zhe3
1 Department of Chemistry, Nanjing University, Nanjing 210095 (China)
2 Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008 (China)
3 Department of Physics, Nanjing University, Nanjing 210093 (China)
ABSTRACT
      Tree rings for analysis were selected from Cedrus deodara growing on a yellow-brown soil in Nanjing City, Pinus massoniana growing on a red soil in the red soil field station at Yintan, Jiangxi Province, and Pinus massoniana growing on a yellow-brown soil in a mining area in Nanjing. Cd, Pb, Cu, Mn, Zn, K and P contents were analysed and average values as well as angular distributions were determined. In cases where the relative deviation was below 0.30, it would be appropriate to use average values to represent the element contents in the tree rings. However, for large standard deviations, the values of the angular distribution would better describe the element contents of rings. The element contents of the environment, particularly the soils, could be obtained from these values.
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Citation: Ke, X. K., Qian, J. L. and Ke, S. Z. 1998. Average values and angular distribution of element contents in tree rings. Pedosphere. 8(4): 377-380.
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