柠条青贮对肉牛 生长性能、瘤胃发酵参数及肉品质的影响.

The aim of this study was to investigate the effects of Caragana silage on the growth performance, rumen fermentation parameters, and meat quality of beef cattle, and to determine the optimal addition ratio of Caragana silage in beef cattle breeding. A total of 48 Simmental beef cattle with similar body weight and good body condition were divided into four treatments with 12 replicates per treatment and one beef cattle per replicate according to the single factor experimental design. Simmental beef cattle in the control group were fed whole corn silage, and beef cattle in the experimental groups were fed experimental diets in which 20%, 40%, and 80% of whole corn silage were replaced by Caragana silage. The pre-feeding period was seven days and the formal test period was 90 days. The results showed that compared with the control group, Simmental beef cattle fed 40% Caragana silage could significantly increase average daily gain by 22.11% (P<0.05). The ratio of feed to gain was significantly decreased by 13.21% (P<0.05). Compared with control group, Simmental beef cattle fed 20% and 40% Caragana silage could reduce rumen NH3-N concentration (P<0.05). Feeding 40% Caragana silage increased rumen protein and propionic acid concentration (P<0.05), and decreased the ratio of ethylene to propylene (P<0.05). Compared with control group, feeding 40% Caragana silage could significantly increase the pH value of the muscle in Simmental beef cattle (P<0.05), and significantly reduce the shear force (P<0.05). Feeding 20% and 40% Caragana silage could significantly reduce the water loss rate (P<0.05). Caragana silage had no significant effect on intramuscular nutrient content of beef cattle (P>0.05). The study indicates that feeding proper proportion of Caragana silage can improve the growth performance and rumen fermentation function of Simmental beef cattle, and improve meat quality, and it is more suitable for Caragana silage to replace 40% whole corn silage. [ABSTRACT FROM AUTHOR]