摘要
The invasion pattern of Eupatorium odoratum in invasion area was studied by random plot sampling method. Eighteen habitat factors of E. odoratum sampling plots such as altitude, gradient and exposure were quantified to precisely describe the invasion patterns of E. odoratum in various habitats with different characteristics, and carried out principal component analysis （PCA）. The results showed that the ecological information of 18 habitat factors of E. odoratum could be characterized by four comprehensive factors. The occurrence frequency of E. odoratum had positive eorrelation with the ecological factors such as exposure, soil moisture, total number of plants, number of shrubs, weeds height, distance form water source, farmland distance, air humidity, arbor height, arbor size, altitude, gradient, number of plant species and weeds coverage, which had negative correlation with air temperature.
The invasion pattern of Eupatorium odoratum in invasion area was studied by random plot sampling method. Eighteen habitat factors of E. odoratum sampling plots such as altitude, gradient and exposure were quantified to precisely describe the invasion patterns of E. odoratum in various habitats with different characteristics, and carried out principal component analysis （PCA）. The results showed that the ecological information of 18 habitat factors of E. odoratum could be characterized by four comprehensive factors. The occurrence frequency of E. odoratum had positive eorrelation with the ecological factors such as exposure, soil moisture, total number of plants, number of shrubs, weeds height, distance form water source, farmland distance, air humidity, arbor height, arbor size, altitude, gradient, number of plant species and weeds coverage, which had negative correlation with air temperature.
基金
Supported by Scientific Research Program of Guangxi Provincial Department of Education ( 201103YB128,201010lx500)
Key Scientific Research Project of Baise University ( 2012KA02)
Integrated Construction Program of Characteristic Biotechnology Majors and Courses ( GXTSZY224 )
2011 Young Teachers Growth Foundation of Baise University
