Studies On Possibility Of Biological Invasion Of Exotic Species, Rhus Typhina

Exotic species Rhus typhina was selected as research material. The experiment was studied by potted plant and field investigation. We want to draw a total conclusion on whether the local ecological environment was invaded by Rhus typhina. If not to do that, how to use it in ecological construction. So the research should be carried out from its inside factors and outside environmental factors. First, whether the biologic, physiologic, ecologic characters of Rhus typhina had attributes of invasion. Second, whether the growth environmental conditions of Rhus typhina may have intrusive. When both of two conditions meeting, Rhus typhina could become biological invasion to its own environmental conditions. But as long as any of these two conditions was not met, then Rhus typhina could not become the biological invasion to the local environment .Therefore this paper followed the principles of the two studies.First, the potted testings and field measurements of Rhus typhina was implemented, in PingShan country, Hebei province. Testing focused on the water-consumption, photosynthesis characteristics, biomass and so on, to analyse whether there is a significant difference in their physiological characteristics between the Rhus typhina and the native species. The results of the study showed: Rhus typhina is wide apex of water use; The average TRAN sequence of growth season is: Zanthoxylum bungeanum Maxim( 3.839μg.cm^-2.s^-1 ) > Juglans regia L. ( 3.493μg.cm^-2.s^-1 ) > Rhus typhina(2.661μg.cm^-2.s^-1)>Ziziphus acidojujuba(2.372μg.cm^-2.s^-1).The diurnal TRAN of Rhus typhina is 2.661μg.cm^-2.s^-1,the result is just higher than Ziziphus acidojujuba. For potted Rhus typhina, Ziziphus acidojujuba and Juglans regia L., the result of photosynthesis show that the average WUE sequence is: Ziziphus acidojujuba(3.34μmol·mmol^-1)>Juglans regia L.(3.32μmol·mmol^-1)>Rhus typhina(3.22μmol·mmol^-1),For spotted Rhus typhina and native species, the WUE of Rhus typhina is the lowest in those species, and not have the characteristic of exotic invaded species.Secondly, field investigation was conducted in the restoration of vegetation on the...