Effect of different mixing ratio of alfalfa and Bromus inermis on silage quality
The experiment aimed to explore the effects of different mixing ratios of alfalfa(Medicago sativa L.)and Bromus inermis on the nutritional and fermentation qualities of their mixed silage.Alfalfa and Bromus inermis were used as experimental materials and mixed in fresh weight ratios of 10∶0,8∶2,7∶3,6∶4,4∶6,3∶7,2∶8,and 0∶10 for ensiling,with three replicates for each treatment.After 60 days of storage,the sensory quality,nutritional components,and fermentation quality were tested and analyzed.The fermentation quality was scored using the V-Score scoring system,and grey relational analysis was used to comprehensively evaluate the nutritional and fermentation qualities of the eight groups of mixed silages to determine the optimal mixing ratio for the two forage grasses.The results showed that when alfalfa is mixed with Bromus inermis in a ratio of 6∶4 for ensiling,the silage quality was optimal,with the lowest pH value and ammonia nitrogen(NH3-N)content,and the highest levels of crude protein(CP)and lactic acid(LA),as well as the lowest levels of acid detergent fiber(ADF)and neutral detergent fiber(NDF).The study indicates that the mixed ensiling of alfalfa and Bromus inermis was superior to the individual ensiling of alfalfa and Bromus inermis.The mixed silage could better exert the advantages of each ensiling raw material,thus better preserving the nutritional components and fermentation quality of the green feed.A mixing ratio of 6∶4 for alfalfa to Bromus inermis is optimal for mixed ensiling.
国家科技期刊平台
NSTL
万方数据
