Hill G M, Miller E R, Stowe H D
J Anim Sci. 1983 Jul;57(1):114-22. doi: 10.2527/jas1983.571114x.
The influence of 0, 50, 500 or 5,000 ppm supplemental Zn on productive characteristics, weight change, and serum and organ mineral concentrations of 60 crossbred and purebred Yorkshire gilts was evaluated. Gilts were fed their respective treatment from 30 kg body weight until the completion of two parities. Sows fed 5,000 ppm supplemental Zn weighed significantly less than sows from the other treatments when killed. Serum alkaline phosphatase activity was higher for the sows fed the highest level of Zn in all replications at 10 and 14 mo of age than for sows from the other treatments. Sows fed 0, 50 or 500 ppm had lower serum Zn and higher serum Cu concentrations than sows fed 5,000 ppm Zn at 10 and 14 mo of age. The number of pigs farrowed (total and live) and birth weight were not affected by dam's dietary treatment. However, sows receiving no additional Zn had a higher number of abnormal pigs/litter than sows on the other treatments. Sows fed 5,000 ppm additional Zn weaned fewer pigs that weighed less at weaning than sows on the other treatments. The concentration of Zn in the sow's liver increased significantly and liver Cu decreased as dietary level of Zn increased. Sows receiving 5,000 ppm Zn had lower hepatic Fe stores compared with sows receiving 500 ppm Zn. Elevated renal Cu and Zn concentrations were found in sows fed the highest level of Zn supplementation. The Zn concentration was higher and the Cu concentration lower in the aorta of sows fed 5,000 ppm Zn compared with sows fed 0 or 50 ppm additional Zn. Incidence of osteochondrosis was higher in sows supplemented with 5,000 ppm Zn than for sows from the other treatments.
评估了0、50、500或5000 ppm补充锌对60头杂交和纯种约克夏母猪生产性能、体重变化以及血清和器官矿物质浓度的影响。母猪从体重30 kg开始饲喂各自的处理日粮，直至完成两胎繁殖。处死时，饲喂5000 ppm补充锌的母猪体重显著低于其他处理的母猪。在10和14月龄的所有重复试验中，饲喂最高水平锌的母猪血清碱性磷酸酶活性高于其他处理的母猪。在10和14月龄时，饲喂0、50或500 ppm锌的母猪血清锌含量低于饲喂5000 ppm锌的母猪，血清铜含量则高于后者。产仔数（总产仔数和活产仔数）和出生体重不受母猪日粮处理的影响。然而，未添加额外锌的母猪每窝异常仔猪数高于其他处理的母猪。与其他处理的母猪相比，饲喂5000 ppm额外锌的母猪断奶仔猪数较少，且断奶时体重较轻。随着日粮锌水平的增加，母猪肝脏中的锌浓度显著升高，铜浓度降低。与饲喂500 ppm锌的母猪相比，饲喂5000 ppm锌的母猪肝脏铁储备较低。在饲喂最高水平锌补充剂的母猪中发现肾脏铜和锌浓度升高。与饲喂0或50 ppm额外锌的母猪相比，饲喂5000 ppm锌的母猪主动脉中锌浓度较高，铜浓度较低。补充5000 ppm锌的母猪骨软骨病发病率高于其他处理的母猪。
