반추가축영양 : 여름철 고온스트레스 기간에 고 양이온 사료와 반추위 보호지방과 나이아신의 추가공급시 착유우의 유생산 및 체온조절에 미치는 영향 = Ruminant Nutrition : Effects of Higher Dietary Cation with or without Protected Fat and Niacin on the Milk Yield and Thermoregulatory Ability in Holsteins During Summer Heat Stress

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