Rojas L X, McDowell L R, Cousins R J, Martin F G, Wilkinson N S, Johnson A B, Velasquez J B
Animal Science Department, University of Florida, Gainesville 32611, USA.
J Anim Sci. 1995 Apr;73(4):1202-7. doi: 10.2527/1995.7341202x.
A study was conducted to compare supplemental Zn lysine (ZnLys), Zn methionine (ZnMet), ZnSO4, and ZnO on Zn, Cu, and metallothionein (MT) concentrations in various fluids and tissues of 40 wether lambs. Supplemental Zn (360 mg/kg) was fed for 3 wk, withdrawn for 4 wk, and then resumed for another week. Mineral (Zn and Cu) concentrations were determined in serum, liver, pancreas, kidney, bone, bone marrow, hoof, and leg muscle, and only Zn was determined in skin and cornea. Metallothionein concentration was determined in liver, pancreas, and kidney. By d 49 serum Zn had increased less (P < .05) for controls than for all lambs except those fed ZnMet, and on d 55 it had increased more (P < .05) for ZnLys than for all but ZnSO4. There were no treatment effects in serum Cu concentration, but overall Cu concentration fell slightly for all treatments from d 0. The ZnLys-treated lambs had the highest (P < .05) Zn accumulation (581, 389, and 340 mg/kg) in kidney, liver, and pancreas, respectively. Both ZnSO4- and ZnMet-treated lambs had higher (P < .05) liver Zn concentrations (195 and 198 mg/kg, respectively) than the control lambs (127 mg/kg). Mean Zn concentration of bone, bone marrow, cornea, skin, hoof, and muscle was not different (P > .05) for lambs among treatments. The ZnLys-treated lambs had the highest (P < .05) MT concentrations (79, 167, and 68 micrograms MT/g for liver, kidney, and pancreas, respectively). Mean muscle Cu concentration was highest (P < .05) for controls (10 mg/kg).(ABSTRACT TRUNCATED AT 250 WORDS)
开展了一项研究，比较补充赖氨酸锌（ZnLys）、蛋氨酸锌（ZnMet）、硫酸锌（ZnSO4）和氧化锌对40只去势公羔羊不同体液和组织中锌、铜及金属硫蛋白（MT）浓度的影响。补充锌（360毫克/千克）饲喂3周，停喂4周，然后再恢复饲喂1周。测定血清、肝脏、胰腺、肾脏、骨骼、骨髓、蹄和腿部肌肉中的矿物质（锌和铜）浓度，仅测定皮肤和角膜中的锌浓度。测定肝脏、胰腺和肾脏中的金属硫蛋白浓度。到第49天，对照组血清锌的增加量比除饲喂蛋氨酸锌的羔羊外的所有羔羊都少（P<0.05），到第55天，赖氨酸锌组血清锌的增加量比除硫酸锌组外的所有组都多（P<0.05）。血清铜浓度没有处理效应，但从第0天起，所有处理的总体铜浓度均略有下降。饲喂赖氨酸锌的羔羊在肾脏、肝脏和胰腺中的锌蓄积量最高（P<0.05），分别为581、389和340毫克/千克。饲喂硫酸锌和蛋氨酸锌的羔羊肝脏锌浓度（分别为195和198毫克/千克）均高于对照羔羊（127毫克/千克）（P<0.05）。不同处理的羔羊骨骼、骨髓、角膜、皮肤、蹄和肌肉中的平均锌浓度无差异（P>0.05）。饲喂赖氨酸锌的羔羊金属硫蛋白浓度最高（P<0.05），肝脏、肾脏和胰腺中分别为79、167和68微克MT/克。对照组的平均肌肉铜浓度最高（P<0.05）（10毫克/千克）。（摘要截短至250字）
