Masters D G, Moir R J
Br J Nutr. 1983 May;49(3):365-72. doi: 10.1079/bjn19830045.
Mature Merino ewes were given either a low-zinc diet (4 mg/kg) or an adequate-Zn diet (50 mg/kg) for all or part of pregnancy. The ewes consuming the low-Zn diet consumed 25% less feed than those given the adequate-Zn diet during the last 115 d of pregnancy. Zn concentration in the plasma of Zn-deficient pregnant ewes declined from 0.7 to 0.3 mg/l. The lambs born to Zn-deficient ewes weighed less and had reduced concentrations of Zn or less total Zn, or both, in the whole carcass, liver and pancreas. A reduction in activity of alkaline phosphatase (EC 3.1.3.1) in the liver and a slight reduction in thymidine kinase (EC 2.7.1.21) activity in the thymus was also observed in Zn-deficient lambs. The Zn-deficient ewes deposited approximately 63 mg Zn into each single-born lamb; this indicates that during the last third of pregnancy the developing foetuses were accumulating the equivalent of 35% of the total dietary Zn intake of the ewes.
在整个孕期或部分孕期，给成年美利奴母羊分别饲喂低锌日粮（4毫克/千克）或足量锌日粮（50毫克/千克）。在妊娠的最后115天，采食低锌日粮的母羊采食量比采食足量锌日粮的母羊少25%。缺锌妊娠母羊血浆中的锌浓度从0.7毫克/升降至0.3毫克/升。缺锌母羊所生的羔羊体重较轻，整个胴体、肝脏和胰腺中的锌浓度降低或总锌含量减少，或两者兼有。在缺锌羔羊中还观察到肝脏中碱性磷酸酶（EC 3.1.3.1）的活性降低，胸腺中胸苷激酶（EC 2.7.1.21）的活性略有降低。缺锌母羊每只单胎羔羊体内沉积约63毫克锌；这表明在妊娠的最后三分之一阶段，发育中的胎儿积累的锌相当于母羊日粮锌总摄入量的35%。
