Composition and application

The invention provides a composition and application. The composition comprises a roxburgh rose pomace extracting solution and roxburgh rose pomace. Wherein the mass ratio of the roxburgh rose pomace extracting solution to the roxburgh rose pomace is (5-6): (9-11). The rosa roxburghii tratt fruit residue extracting solution is extracted by the following method: performing ultrasonic extraction on rosa roxburghii tratt fruit residue powder with ethanol, filtering and concentrating to obtain the rosa roxburghii tratt fruit residue extracting solution. The rosa roxburghii tratt pomace extracting solution in the composition has a good antibacterial effect and particularly has a more obvious antibacterial effect on staphylococcus aureus and escherichia coli, and through mutual cooperation of the rosa roxburghii tratt pomace extracting solution and the rosa roxburghii tratt pomace, the palatability of the feed is improved, meanwhile, the antibacterial effect of the feed can be effectively improved, and the feed qua