Morphological characteristics such as LA,SLA,LDMC and plant height,biomass and biomass distribution and population quantitative trait of Eupatorium catarium such as population coverage and density,were determinated to study the differences of morphological characteristics,biomass and biomass distribution and population quantitative trait of E. catarium in farmland,wastelands Eucalyptus forest and roadside 4 different kinds of habitats. The results were as followed: Light and soil nutrients had significant i...