Evaluation of a microencapsulated form of zinc oxide on weanling pig growth performance, fecal zinc excretion, and small intestinal morphology.
| Autor: | Dahmer PL; Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS, USA., Jones CK; Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS, USA., Ferreyra FM; Veterinary Diagnostic Lab, Kansas State University College of Veterinary Medicine, Manhattan, KS, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Translational animal science [Transl Anim Sci] 2023 Dec 23; Vol. 8, pp. txad146. Date of Electronic Publication: 2023 Dec 23 (Print Publication: 2024). |
| DOI: | 10.1093/tas/txad146 |
| Abstrakt: | A total of 300 pigs (DNA 200 × 400; initially 6.0 ± 0.08 kg body weight [ BW ]) were used in a 42-d study to evaluate a microencapsulated form of zinc oxide. At weaning, pigs were randomly allocated to pens, and pens were randomly assigned to dietary treatments with 5 pigs per pen and 12 pens per treatment. Dietary treatments were 1) negative control (CON; standard nursery diet containing 110 ppm Zn in the form of zinc sulfate from trace mineral premix); 2) control diet with 400 ppm added Zn from ZnO included in phases 1 and 2 (Low-ZnO); 3) control diet with 3,000 ppm added Zn from ZnO included in phase 1 and 2,000 ppm added Zn from ZnO included in phase 2 (High-ZnO); 4) control diet with 400 ppm added Zn from microencapsulated ZnO included in phases 1 and 2 (Low-MZnO; Vetagro S.p.A., Reggio Emilia, Italy); 5) control diet with 3,000 ppm added Zn from microencapsulated ZnO in phase 1 and 2,000 ppm added Zn from microencapsulated ZnO in phase 2 (high-MZnO; Vetagro S.p.A., Reggio Emilia, Italy). On days 10 and 28, fecal samples from 2 pigs per pen were collected for fecal Zn concentrations, and on day 28, 30 pigs ( n = 6) were euthanized, and small intestinal tissues were collected to evaluate morphology. For the entire treatment period (days 0 to 28) there was no evidence of differences in average daily gain ( ADG ), average daily feed intake ( ADFI ), or G:F ( P > 0.05). During the common phase 3 (days 28 to 42) pigs fed the negative control, High-MZnO, or Low-MZnO had improved ( P < 0.0001) ADG and ADFI compared to pigs fed High- or Low-ZnO. For the entire experiment (days 0 to 42), pigs fed Low-ZnO or High-ZnO had reduced ( P < 0.0001) ADG compared to those fed the negative control. A significant treatment × day interaction ( P = 0.04) was observed for fecal Zn concentrations, where the level of Zn excreted in the feces was dependent on the sampling day in pigs fed a low level of ZnO or low level of microencapsulated ZnO. There was no evidence ( P > 0.05) that small intestinal morphology differed significantly between treatments. In summary, feeding a microencapsulated form of ZnO did not alter piglet growth performance during the treatment period. Pigs fed a low level of ZnO or microencapsulated ZnO had reduced fecal Zn excretion by the end of the feeding period, but no significant impacts were observed on piglet small intestinal morphology. (© The Author(s) 2023. Published by Oxford University Press on behalf of the American Society of Animal Science.) |
| Databáze: | MEDLINE |
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