Randy H A, Heintz J F, Lynch D L, Sniffen C J
J Dairy Sci. 1984 Dec;67(12):2974-7. doi: 10.3168/jds.S0022-0302(84)81662-8.
Seven yearling Alpine does were in a series of balance trials to determine apparent utilization of fiber, protein, and minerals. The 34 kg does consumed 2.2% body weight of a hay-concentrate ration that was 18.8% crude protein, 40.9% neutral detergent fiber, 24.7% acid detergent fiber, 1.18% calcium, .67% phosphorus, .39% magnesium, .98% potassium, and .48% sodium. Digestion coefficients were 59.5, 68.5, 42.3, 70.6, and 29.3 for dry matter, crude protein, neutral detergent fiber, hemicellulose, and acid detergent fiber. Retention (g/day) was: 2.6, 1.3, 2.1, 1.8, and 1.1 for calcium, phosphorus, potassium, sodium, and magnesium. Nitrogen intake was related in a positive linear fashion to fecal nitrogen, urinary nitrogen, and absorbed nitrogen. Apparent absorption rates were 2.7, 1.4, 1.3, 5.1, and 3.2 g per doe per day for calcium, phosphorus, magnesium, potassium, and sodium. Mineral retentions as percent of grams apparently absorbed were 96.2, 88.2, 80.9, 37.7, and 56.0.
七只一岁龄的阿尔卑斯母羊参与了一系列平衡试验，以确定纤维、蛋白质和矿物质的表观利用率。体重34千克的母羊消耗了占体重2.2%的干草-精料日粮，该日粮含有18.8%的粗蛋白、40.9%的中性洗涤纤维、24.7%的酸性洗涤纤维、1.18%的钙、0.67%的磷、0.39%的镁、0.98%的钾和0.48%的钠。干物质、粗蛋白、中性洗涤纤维、半纤维素和酸性洗涤纤维的消化系数分别为59.5、68.5、42.3、70.6和29.3。钙、磷、钾、钠和镁的保留量（克/天）分别为：2.6、1.3、2.1、1.8和1.1。氮摄入量与粪氮、尿氮和吸收氮呈正线性关系。每只母羊每天钙、磷、镁、钾和钠的表观吸收率分别为2.7、1.4、1.3、5.1和3.2克。矿物质保留量占表观吸收克数的百分比分别为96.2、88.2、80.9、37.7和56.0。
