Primary Report of Present Situation of Woody Species in Yanan University

The didentified and classified woody species in Yan'an University.were investigated.It provided information of their growing conditions and summarized causes for their poor growth.It might provide helps for new species introduction,plant resources protection and establishing,high-level trial bases building.The results were as follows:on campus,there were 49kinds of woody species(Don't include a glasshouse cultivation a plant in the plant category for statistics),which belonged to 34genera,20 families.But mo no genus were about 75.0% of total families and auto genus were about 79.4% of total genera.The woody plant resources could meet basic demands for teaching and researching.Large number of woody species was growing well.But parts of them were in poor situations because of human destruction,bad climatic adaptation,plant diseases and insect pest.The suggestions of plant s management were put forward.