The invention belongs to the field of
animal nutrition and feed science, and relates to a feeding technology capable of improving production performance, body health (
immunity and
oxidation resistance) and economic benefit of mutton sheep and improving
rumen pH value, blood buffer capability and blood acid-base balance maintaining capability, namely preventing chronic
rumen acidosis, and a daily ration preparation method thereof. According to the feeding technology and the daily ration preparation method,
vitamin B12 (cyanocobalamine) is added into the mutton sheep high-concentrate daily ration (the concentrate-to-coarse ratio is 6: 4), the adding level is 0.5 mg / kg in terms of
dry matter per kg of the daily ration, it is at least guaranteed that the pre-feeding period is 7 days and the
positive test period is 30 days or above in the feeding time of the mutton sheep, the production performance, the
organism immunity, the
oxidation resistance and the
economic benefits of the mutton sheep can be improved, and the mutton sheep feed is suitable for large-scale production. The pH value of the
rumen, the blood buffering power and the blood acid-base balance maintaining capacity are improved, namely the effect of preventing chronic
acidosis of the rumen is achieved, and the mutton sheep
feed additive is suitable for mutton sheep with the weight being 34 kg or above. The method is easy to operate and safe in production, and a new thought and method are provided for preventing chronic rumen
acidosis under the condition that mutton sheep are fed with high-concentrate daily ration.