Study on Niche Characteristics of Plant Population in Dongshan Afforestion of Lintao County

The Shannon-wiener niche breadth width and Petraitis niche overlaps index was used to analysis niche characteristics of plant population of Dongshan afforestation.The results showed that there is great difference among the difference of niche breadth of plant population,during 10.4569~0.1633,the plant population has been divided for four types during artificial interference factors.With broad niche breadth,the niche of other populations had a higher rate of overlaps and the niche overlap of the populations with broad was not high certainly.