Beighle D E, Boyazoglu P A, Hemken R W, Serumaga-Zake P A
Department of Animal Health, School of Agriculture, University of Bophuthatswana, South Africa.
Am J Vet Res. 1994 Jan;55(1):85-9.
Mean phosphorus (P) content in bovine rib bone was 102.9, 108.3, and 182.7 mg/g of bone on fresh, dry, and ash weight bases, respectively. Values for calcium (Ca) were 194.3, 203.7, and 344.6 mg/g, respectively, and for magnesium (Mg) were 5.3, 5.5, and 9.4 mg/g, respectively. Mean percentage of ash in rib bone was 59.12%. Expected concentrations of Ca, P, and Mg were determined on fresh, dry, and ash weight bases and for 3 age groups, 3 breeds, and bulls, females, and steers. On an ash weight basis, cattle 6 to 18 months old had 185.74 mg of P/g, 372.52 mg of Ca/g, and 12.37 mg of Mg/g. Those 19 to 36 months old had 182.02 mg of P/g, 322.35 mg of P/g, and 8.09 mg of Mg/g. Those > 36 months old had 174.80 mg of P/g, 340.36 mg of Ca/g, and 6.62 mg of Mg/g. Steers had 183.93 mg of P/g, 352.73 mg of Ca/g, and 10.15 mg of Mg/g. Females had 178.47 mg of P/g, 320.28 mg of Ca/g, and 6.5 mg of Mg/g. Males had 176.15 mg of P/g, all on an ash weight basis. Dairy breeds were found to have 186.08 mg of P/g, 351.25 mg of Ca/g, and 10.47 mg of Mg/g. Cattle of mixed breeding had 177.42 mg of P/g, 341.28 mg of Ca/g, and 6.54 mg of Mg/g. The Africander breed of beef cattle had 167.07 mg of P/g, all on an ash weight basis.
牛肋骨中磷（P）的平均含量，以鲜重、干重和灰重计，分别为102.9、108.3和182.7毫克/克骨。钙（Ca）的含量分别为194.3、203.7和344.6毫克/克，镁（Mg）的含量分别为5.3、5.5和9.4毫克/克。肋骨中灰分的平均百分比为59.12%。根据鲜重、干重和灰重，以及3个年龄组、3个品种和公牛、母牛及阉牛，测定了Ca、P和Mg的预期浓度。以灰重计，6至18个月大的牛每克含185.74毫克P、372.52毫克Ca和12.37毫克Mg。19至36个月大的牛每克含182.02毫克P、322.35毫克P和8.09毫克Mg。36个月以上的牛每克含174.80毫克P、340.36毫克Ca和6.62毫克Mg。阉牛每克含183.93毫克P、352.73毫克Ca和10.15毫克Mg。母牛每克含178.47毫克P、320.28毫克Ca和6.5毫克Mg。公牛每克含176.15毫克P，均以灰重计。发现奶牛品种每克含186.08毫克P、351.25毫克Ca和10.47毫克Mg。杂交牛每克含177.42毫克P、341.28毫克Ca和6.54毫克Mg。非洲肉牛品种每克含167.07毫克P，均以灰重计。
