Kotula A W, Lusby W R
J Anim Sci. 1982 Mar;54(3):544-8. doi: 10.2527/jas1982.543544x.
The diaphragm, longissimus, psoas major, semitendinosus and transversus abdominus muscles from eight or nine Angus steers were evaluated at each age of slaughter including 12, 18, 24, 30, 36, 48, 60 and 72 mo. The content of K, Fe, and Zn varied (P less than .01) with age of the steers. Ca, Na and Mg were not affected. The K content on a fat-free basis decreased from a high of 392 mg/100 g wet tissue at 24 mo of age to a low of 332 mg/100 g at 72 mo. Fe content increased with age from 2.00 mg/100 g of tissue at 12 mo to 3.73 mg/100 g at 72 mo. Concentrations of all minerals varied (P less than .01) among the five muscles evaluated. Feeding regimen had a significant effect on K, Fe and Zn, Steers fed entirely ad libitum had a higher K (17 mg/100 g more) and Fe (.19 mg/100 g more) content in their muscles than did the steers that were fed to gain .45 kg/d or those fed ad libitum for the last 6 mo before slaughter. Where significant, the magnitude of the difference in mineral content among age groups, muscles and feeding regimens was large enough to require that maturity, muscle and feeding regimen be specified when values for mineral content were reported.
对8或9头安格斯阉牛的膈肌、最长肌、腰大肌、半腱肌和腹横肌在每个屠宰年龄进行评估，屠宰年龄包括12、18、24、30、36、48、60和72月龄。钾、铁和锌的含量随阉牛年龄的变化而变化（P小于0.01）。钙、钠和镁不受影响。以无脂为基础，钾含量从24月龄时每100克湿组织392毫克的高位降至72月龄时每100克332毫克的低位。铁含量随年龄增长，从12月龄时每100克组织2.00毫克增至72月龄时每100克3.73毫克。在评估的5种肌肉中，所有矿物质的浓度均有变化（P小于0.01）。饲养方式对钾、铁和锌有显著影响，完全自由采食的阉牛肌肉中的钾（多17毫克/100克）和铁（多0.19毫克/100克）含量高于那些按每天增重0.45千克饲养的阉牛或在屠宰前最后6个月自由采食的阉牛。在有显著差异的情况下，年龄组、肌肉和饲养方式之间矿物质含量差异的幅度足够大，以至于在报告矿物质含量值时需要指明成熟度、肌肉和饲养方式。
