Effect of diets differing in protein concentration (low vs medium) and nitrogen source (urea vs soybean meal) on in vitro rumen fermentation and on performance of finishing Italian Simmental bulls

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• 作者：Mauro Spanghero ; ^{mauro.spanghero@uniud.it} ; Federico Mason ^{federico.mason@uniud.it} ; Cristina Zanfi ^{cristina.zanfi@uniud.it} ; Anna Nikulina ^{nikulina.anna@spes.uniud.it}
• 关键词：Dietary protein ; Dietary urea ; Rumen continuous fermenter ; Simmental bulls ; Carcass traits ; Meat quality
• 刊名：Livestock Science
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：196
• 期：Complete
• 页码：14-21
• 全文大小：299 K
• 卷排序：196

文摘

Dietary protein levels and urea inclusion were tested in finishing Simmental bulls. Low protein diets (70–74 g/kg DM of PDI) tended to decrease weight gain. Low protein diets did not affect carcass traits and meat quality. Substituting SBM with urea (0.5% DM) did not depress growth and carcass traits. Diets high in protein or with urea stimulated rumen butyrate yield in vitro.