J Anim Sci. 2017 Dec;95(12):5420-5429. doi: 10.2527/jas2017.1810.
A completely randomized 3 × 3 + 1 factorial experiment was conducted to evaluate the effects of sources and concentrations of Zn on growth performance, nutrient digestibility, serum biochemical endpoints, and fur quality in growing-furring female black mink. One hundred fifty healthy 15-wk-old female mink were randomly allocated to 10 dietary treatments ( = 15/group) for a 60-d trial. Animals in the control group were fed a basal diet, which consisted of mainly corn, soybean oil, meat and bone meal, and fish meal, with no Zn supplementation. Mink in the other 9 treatments were fed the basal diet supplemented with Zn from either zinc sulfate (ZnSO), zinc glycinate (ZnGly), or Zn pectin oligosaccharides (ZnPOS) at concentrations of either 100, 300, or 900 mg Zn/kg DM. The results showed that mink in the ZnPOS groups had higher ADG than those in the ZnSO groups (main effect, < 0.05). The addition of Zn reduced the G:F ( < 0.05). In addition, CP and crude fat digestibility were linearly increased with Zn supplementation ( < 0.05) and N retention tended to increase with Zn addition ( = 0.08). Dietary Zn supplementation increased the concentration of serum albumin and activity of alkaline phosphatase ( < 0.05). There was a linear effect of dietary Zn on the concentration of tibia Zn and pancreatic Zn ( < 0.05). For fur quality characteristics, the fur density and hair color of mink were improved by dietary Zn concentration ( < 0.05). Compared with ZnSO (100%), relative bioavailability values of ZnGly were 115 and 118%, based on tibia and pancreatic Zn, respectively, and relative bioavailability values of ZnPOS were 152 and 142%, respectively. In conclusion, this study demonstrates that Zn supplementation can promote growth and increase nutrient digestibility and fur quality and that ZnPOS is more bioavailable than ZnSO and ZnGly in growing-furring female mink.
采用完全随机 3×3+1 析因试验设计，评估了锌源和锌浓度对生长育肥期雌性黑貂生长性能、养分消化率、血清生化指标和皮毛质量的影响。将 150 只 15 周龄健康雌性黑貂随机分配到 10 种日粮处理（每组 15 只）中进行为期 60d 的试验。对照组饲喂基础日粮，主要由玉米、大豆油、肉骨粉和鱼粉组成，不添加锌。其余 9 个处理组的黑貂饲喂基础日粮，分别添加硫酸锌（ZnSO）、甘氨酸锌（ZnGly）或锌果胶寡糖（ZnPOS）作为锌源，锌浓度分别为 100、300 或 900mg Zn/kg DM。结果表明：ZnPOS 组黑貂的 ADG 高于 ZnSO 组（主效应，<0.05）。添加锌降低了料重比（<0.05）。此外，随着锌的添加，CP 和粗脂肪消化率呈线性增加（<0.05），氮保留量呈增加趋势（=0.08）。日粮添加锌提高了血清白蛋白浓度和碱性磷酸酶活性（<0.05）。日粮锌对胫骨和胰腺锌浓度呈线性影响（<0.05）。对于皮毛质量特征，日粮锌提高了皮毛密度和毛色（<0.05）。与 ZnSO（100%）相比，ZnGly 的相对生物利用率基于胫骨和胰腺锌分别为 115%和 118%，ZnPOS 的相对生物利用率分别为 152%和 142%。综上所述，本研究表明，锌的添加可以促进生长，提高养分消化率和皮毛质量，并且 ZnPOS 在生长育肥期雌性黑貂中的生物利用率高于 ZnSO 和 ZnGly。
