Effects of Plant Growth Promoting Rhizobacteria（PGPR） on Plant Growth and Its Mechanism

For a long time, agricultural production in China has relied excessively on chemical fertilizers, neglecting the enormous biological potential of the plant-microbial-soil system. Plant growth promoting rhizobacteria（PGPR） can release nutrients in the rhizosphere and promote plant growth. They are the main source of microbial fertilizers and have broad application prospects. Under the policy of restricting chemical fertilizer in China, investigating the characteristics and effects of PGPR plays an important role in enhancing yield and efficiency of agricultural production. Therefore, this article reviewed the research progress on the mechanism of PGPR in promoting plant growth and the interaction mechanism between soil-PGPR-plants at home and abroad, and prospected its application in the development and application of microbial fertilizers and the promotion of green agriculture development.