Low protein diets without medicinal zinc oxide for weaned pigs reduced diarrhea treatments and average daily gain
| Autor: | J.K. Bache, Julie C Lynegaard, N.J. Kjeldsen, C. F. Hansen, Charlotte Amdi, Nicolai Rosager Weber, Jens Nielsen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Diarrhea
Low protein Swine Diarrhea Frequency chemistry.chemical_element Zinc Weaning Growth Biology Feed conversion ratio SF1-1100 Animal science Antibiotics Crude protein medicine Diet Protein-Restricted media_common.cataloged_instance Animals European union Feces media_common Animal Feed Diet Animal culture chemistry Dietary Supplements Animal Science and Zoology medicine.symptom Zinc Oxide Post-weaning |
| Zdroj: | Animal, Vol 15, Iss 1, Pp 100075-(2021) Lynegaard, J C, Kjeldsen, N J, Bache, J K, Weber, N R, Hansen, C F, Nielsen, J P & Amdi, C 2021, ' Low protein diets without medicinal zinc oxide for weaned pigs reduced diarrhoea treatments and average daily gain ', Animal, vol. 15, no. 1, 100075 . https://doi.org/10.1016/j.animal.2020.100075 |
| ISSN: | 1751-7311 |
| Popis: | The use of medicinal zinc oxide (ZnO) in post-weaning diets must be phased out in the European Union by 2022, resulting in urgent needs for alternative strategies to prevent diarrhea in pigs. The objective of this study was to test the effect of four different dietary protein strategies with different amino acid profiles on diarrhea frequency and pig performance as alternative diet plans when medicinal ZnO waswill be excluded from the diet. A total of 6 800 Duroc x (Danish Landrace x Yorkshire) pigs, weaned around 28 days of age, were randomly assigned by sex and size to six dietary treatments. The treatments were; standard CP levels (191, 184, 184 g/kg CP) and allocated 2 500 ppm ZnO in phase 1 (PC = positive control), standard CP levels (191, 184, 184 g/kg CP) and no added ZnO in phase 1 (NC = negative control), CP levels of 166, 184, 184 g/kg (LSS = low-standard-standard), CP levels of 166, 162, 192 g/kg (LLH = low-low-high), CP levels of 140, 193, 192 g/kg (VHH = very low-high-high), and lastly 140, 174, 192 g/kg CP levels (VMH = very low-medium-high). The pigs entered the trial at ~ 7 kg BW and exited at ~ 30 kg BW. As expected, the PC treatment resulted in 42% fewer diarrhea pen treatments in the total trial period compared to the NC group (P < 0.05), whereas both PC and LLH had fewer diarrhea treatment days per pig compared to NC pigs (P < 0.05). Additionally, at the point of treatment, the NC pens had 33% fecal floor samples positive for pathogens, compared to 80% samples positive for pathogens in the PC pens. This suggests that ZnO has a particular positive effect on non-infectious diarrhea without bacterial involvement. A reduction in dietary CP levels in phase 1 led to a reduced average daily gain (ADG) in LLH and VMH pigs and a poorer feed conversion ratio (FCR) in VHH pigs during the overall study period compared to the NC pigs (P < 0.05). Conclusively, a diet with low CP levels from weaning to about 15 kg BW had a reducing effect on diarrhea, but decreased ADG without affecting the FCR. |
| Databáze: | OpenAIRE |
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