Construction of complex flora and optimization of fermentation conditions for potato residue animal feed.

The experiment was to improve the feeding value of potato residue. Two strains AAG-17 and CPA-3-4 with high enzyme activity preserved in laboratory were used to construct composite flora, the fermentation conditions were optimized by single factor combined with response surface method, and the potato residue before and after degradation was observed by infrared and electron microscopy. The results showed that when the initial pH value of 7, the fermentation revolution of 160 r/min and the inoculated-pathogen quantities of 2%, the inoculation ratio (CPA-3-4: AAG-17) was 3:1, the theoretical value of degradation rate of potato residue was 36.58%, and the repeated test results showed that the degradation rate was 36.90%. The results of SEM and Fourier IR on potato residue before and after degradation showed that complex flora had significant degradation effect on potato residue. The study indicates that the experiment determines the optimum condition of compound flora fermentation of potato residue animal feed, and the nutritional value of ferment potato residue animal feed is improved. [ABSTRACT FROM AUTHOR]