Bacillus and azotobacter counts in solid biofertilizer with different concentration of zeolite and liquid inoculant

Abstract Bacillus and Azotobacter sp are Plant Growth Promoting Rhizobacteria widely used as biofertilizer. The success of commercial carrier-basedbiofertilizer is depend on formulation which dictate the shelf live cell viability well. A laboratory experiment was conducted to evaluate population in compost-based solid biofertilizer with several zeolite liquid inoculant concentration. completely randomized design test combintion treatment three concentration (0.1, 1 5%) four initial mixed (1, 5, 10 15%). All formulations were incubated at room temperature prior count day 7, 14, 21 28. results verified that, both bacteria higher than population. influenced 7 days 14 Nonetheless bacterial species contained 1% 10% well 5% inoculant. Both maintain up 12 log cfu/g respectively.