Evaluation of the palatability of zinc oxide and zinc sulphate in the piglets diet | Evaluación de la palatabilidad del óxido y sulfato de zinc en la alimentación de los lechones
2011
Davin, R., Universitat Autònoma de Barcelona, Bellaterra (España). Dept. de Ciència Animal i dels Aliments | Manzanilla, E.G., Universitat Autònoma de Barcelona, Bellaterra (España). Dept. de Ciència Animal i dels Aliments | Figueroa, J., Universitat Autònoma de Barcelona, Bellaterra (España). Dept. de Ciència Animal i dels Aliments | Solá Oriol, D., Universitat Autònoma de Barcelona, Bellaterra (España). Dept. de Ciència Animal i dels Aliments | Pérez, J.F., Universitat Autònoma de Barcelona, Bellaterra (España). Dept. de Ciència Animal i dels Aliments
Therapeutic doses of in-feed ZnO (3000ppm) have become a common practice in some EU countries to prevent or treat diarrhea in weaning pigs. However, high doses Zn are not retained by the animals, provoking a high Zn excretion in the slurry and environmental concerns. Alternative more soluble sources of Zn, such as Zn sulphate (ZnSO4), may allow for a likely reduction of in-feed Zn doses. However, the presence of soluble Zn in the mouth may provoke palatability problems and feed refusal. In the present trial we evaluated the palatability of a range dose of ZnO and ZnSO4 in feed by doing double-choice feeding trials. Two-hundred and forty 28 days old piglets were weaned and allocated by sex and weight in twelve pens (20 pigs / pen). Pens were initially distributed to six different treatments at random: 1000, 2000 and 3000 ppm of ZnO or 300, 600 and 900 ppm of ZnSO4, performing two experiments and following a cross-over design for each Zn source with 3 treatments and 3 periods. The six treatments were compared with a control diet without any added zinc. Both, ZnO and ZnSO4 showed a lower preference than the control diet at doses of 3000ppm for ZnO (25.09% of the total intake, p-value=0.0005) and 600 ppm and 900 ppm for ZnSO4 (32.83% and 27.07%, p-values=0.0259 and 0.0261, respectively). On a third experiment 3000 ppm of ZnO was compared vs 900 ppm of ZnSO4 in all pens. Animals fed previously on ZnSO4 showed a preference for the ZnSO4 (62%), animals fed on ZnO did not show any preference.
显示更多 [+] 显示较少 [-]