Abstract:Niche is an important theoretic problem in studying plant population and community ecology. Niche breadth may be a measure of turfs‘ using diversity to environmental resource and it is a response of weeds to ecological niche. Niche-overlap is a measure to display the similarity of plant interspecies bionomics. Studies on the important value, niche breadth, and niche overlap of different weeds in turf can reveal the ecological demand similarity of different weeds, and can forecast the trend of reciprocal aff...