Effects of Plant Growth-promoting Bacterial on the Growth of Maize and the IAA Secrete Ability Detection

In this study, the test biocontrol bacteria were used to treat the maize seeds. Seven growth-promoting bacteria were selected through the detection of maize fresh weight, dry weight, height. Salkowski colorimetric solution was used for the IAA secrete ability detection of 7 test strains. The results showed a different levels increase of three agronomic traits which treated by 7 test strains; With the deal with Bacillus amyloliquefaciens strain C3, the maize fresh weight, dry weight, height were increased 185%, 215% and 66%, respectively; 7 strains have a different IAA secrete ability; the B. amyloliquefaciens strain C3 has a higher IAA secrete ability than other 6 strains, 251.37mg/mL. This is the first report of B. amyloliquefaciens used for maize growth-promoting in China.