Abstract: 【Objective】Study on the colonization regulation of Phosphobacteria and its effect on the growth and development of C. sachalinensis, thus providing a theoretical basis for soil management.【Method】Three of the high phosphate-dissolving ability trains, Bacillus(Y4), Pseudomonas(J6) and Flavimonas(H7), were selected using dilution plate and conventional methods from C. sachalinensis rhizosphere. The colonization regulation of phosphobacteria and its effect on rhizosphere characteristic of cherry and plant growth and development were studied. 【Result】Three trains colonization site varied with inoculation time, there were not trains colonized in root-inside in the mix inoculation treatment, the colonization density of bacteria decreased gradually regardless single or mix inoculation treatments. After inoculating phosphobacteria, the invading capability of bacteria was stronger than actinomyces and fungi, and the quantity of bacteria were bigger than them. InoculationY4 could improve the net photosynthetic rate than CK, but the effect was gradually weakened, while inoculation other suspension decreased the net photosynthetic rate. Inoculation Y4 could increase the content of total P.【Conclusion】 The colonization quantity of phosphobacteria were decreasing with the increasing of introduced microorganism invading quantity. Bacteria had more effect on the colonization of phosphobacteria. Inoculation Pseudomonas (Y4)and Bacillus (J6)could promote plant growth and development.

Key words: Cerasus sachalinensis, Root, Phosphobacteria, Colonization