Based on catalogue of biology and geochemistry of chemical elements, content characteristics and variation law of the large
nutrient elements, the needful trace elements, the uncertain needful elements, the non-needful elements and the toxic elements
in
Betula ermanii trees are analyzed. The result shows that the content of the large nutrient elements in
Betula ermanii trees is higher than that of other kinds of element; the contents of all kinds of elements in foliage with vigorous metabolism
are higher than those in other parts; the content variations of the large nutrient elements and the needful trace elements
with similar chemical property, geochemical property and biological function in different parts of
Betula ermanii trees show the similar laws; but the other three kinds of elements variations are without laws. It is indicated that the
variation of the needful elements in the plant follows a certain law, they are in relative equilibrium under undisturbed condition.
Key Words
Betula ermanii forest - chemical element - variation law
CLC number P593
Foundation item: Under the auspices of the Natural Science Foundation of the Chinese Academy of Sciences.
Biography: LIU Jing-shuang(1956 -), male, a native of Jilin Province, professor, doctor tutor. His research interest includes
environment science. E-mail: liujingshuang@mail.ccig.ac.cn