补饲不同能氮比精料对牧区冬春季羔羊营养物质消化及瘤胃发酵的影响
보사불동능담비정료대목구동춘계고양영양물질소화급류위발효적영향
Effects Supplementation of Concentrates with Different Ratios of Energy to Nitrogen on Nutrient Digestion and Rumen Fermentation in Lambs in Pastoral Areas in Winter and Spring
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