Effects of phosphate-solubilizing bacteria on the growth of maize seedling and bacterial community structure and phosphorus fractions in rhizosphere soil
Two phosphate-solubilizing agents FD11(Priestia sp.)and CH07(Bacillus aryabhattai)were used as experimental materials to carry out pot experiment of maize root irrigation.The effects of phosphate-solubilizing bacteria agents on maize growth,soil nutrients,soil microbial properties and the contents of different forms of phosphorus in rhizosphere soil were studied.The results showed that the application of phosphate-solubilizing bacteria improved the nutrient and microbiological characteristics of rhizosphere soil,increased the content of active phosphorus source in rhizosphere soil,promoted the growth of maize roots,and showed a good growth promotion effect on maize seedlings.Compared with no inoculant,the plant height,stem diameter and aboveground dry weight of maize seedlings treated with FD11 increased by 31.88％,36.39％and 104.00％,respectively,while the available nitrogen,available phosphorus and available potassium in rhizosphere soil increased by 21.90％,107.67％and 5.77％,respectively.The contents of H2O-Pi(Pi represents inorganic P),NaHCO3-P and NaOH-P increased,but the contents of HCl-Pi and residual-P decreased significantly.The application of phosphate-solubilizing bacteria affected the bacterial community structure in maize rhizosphere soil.At genus level of soil bacterial taxonomy,the relative abundance of functional bacteria such as Acinetobacter,Pseudomonas,Pontibacter,Sphingobacterium and Arthrobacter increased significantly.In conclusion,the application of phosphate-solubilizing bacteria significantly increased the content of soil available nutrients,changed the community structure of soil bacteria in rhizosphere soil,and increased the content of active phosphorus source,thus improving soil fertility and promoting root development and seedling growth of maize.This study can provide theoretical basis for the research of new microbial fertilizer.
phosphate-solubilizing bacteriasoil fertilityroot morphologyphosphorus fractionsmicrobial community structure
万方数据
维普
