Microbial isolation,identification and physiology of compound bacterial manure

The microbial flora in the compound bacterial manure were isolated,identified and the amount of the bacteria determined.The physiological characteristics of the strains were studied.In the compound bacterial manure,there were potash germs,phosphate germs and nitrogen fixation bacteria(Azotobacter vinelandii) with considerable activities.The total counts in the manure reached 200-250 million per gram.The nitrogen fixation bacteria grew well,and exhibited high activity on a modified Dobereiner culture medium.The optimum growth conditions were found to be 20-32℃ and pH 7.5.