极地研究(英文版)2002，Vol.13Issue(2)：111-116,6.
SR-XRF analysis of Polytrichum in the Fildes Peninsula, Antarctica
SR-XRF analysis of Polytrichum in the Fildes Peninsula, Antarctica
沈显生 1康士秀 2孙立广 3尹雪斌 3吴自勤 2何伟4
作者信息
- 1. Academy of Life Sciences, University of Science and Technology of China, Hefei 230027, China
- 2. Department of Astronomy and Applied Physics, University of Science and Technology of China, Hefei 230026, China
- 3. Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China
- 4. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
- 折叠
摘要
Abstract
In order to study the element contents and distribution of various mosses collected in the Antarctica, we analyzed the heavy elements of 3 species of Polytrichum in the Fildes Peninsula, P. alpinum, P. juniperinum and P. alpestre, by synchrotron radiation X-ray fluorescence (SR-XRF). The result shows that the elements, such as K, Ca, Mn, Fe, Cu, Zn and Sr, are nearly the same in Polytrichum. The peak intensity of K is higher than that of Ca, and the peak intensity of Ca is higher than that of Fe in P. alpinum. In P. juniperinum, the peak intensity of K is higher than that of Ca, and the peak intensity of Ca is close to that of Fe. The peak intensity of K is nearly equal to those of Ca and Fe in P. alpestre. Therefore, the habitats of 3 species of Polytrichum are similar in the Fildes Peninsula. By XRF analyzing of different parts of P. alpestre, we found that the peak intensities of relative concentration of elements are obviously different. The peak intensity of K in apical-bud is the highest in organism. The peak intensity ratio of K/Ca is 1.30, but they are below 1.0 in all the other parts. The peak intensity of Mn in pseudo-root is the highest in organism, and the peak intensity ratio of Mn/Fe is 0.21, the biggest. In the parts of older leaf and pseudo-root, the ratios of Cu/Zn are 1.20 and 1.84 respectively, whereas they are less than 1 in the other parts. The element Br is seen specially in the older leaf and pseudo-root, that may result from the organs aged, and enhance the ability of anti-rottenness itself.关键词
Antarctica/Polytrichum/heavy elements/X-ray fluorescenceKey words
Antarctica/Polytrichum/heavy elements/X-ray fluorescence分类
天文与地球科学引用本文复制引用
沈显生,康士秀,孙立广,尹雪斌,吴自勤,何伟..SR-XRF analysis of Polytrichum in the Fildes Peninsula, Antarctica[J].极地研究(英文版),2002,13(2):111-116,6.
