Abstract: A pplied ethnobotany is a new subject in ethnobio logical sciences referring to the transferring,reviving and cultivating ethnobotanical knowledge among different social groups with in intra and inter communities.Much research related to biodiversity in many countries is largely devoted to the gathering of more academic information,rather than to more incise studies focusing on finding answers to pressing challenges related to the use of plants by communities.China is a country possessing rich biodiversity and cultural diversity.

Key words: walnut, drought stress, rhizosphere, plant growth-promoting rhizobacteria, community structure, diversity.