Abstract
The bioavailability of dietary zinc (Zn) in pigs may differ according to the Zn source and is affected by other components in the diet. The aim was to determine the biomarkers of Zn bioavailability (apparent total tract digestibility of Zn and serum Zn status) following six different sources of added Zn and their effect on the performance and faecal consistency score in piglets 0–3 weeks after weaning on day 28. The sources of Zn were Zn oxide (ZnO), Zn sulfate (ZnSO4), porous ZnO, Zn-glycinate, amino acid-bound Zn and hydroxy covalent-bound Zn added at 100 mg/kg (ZnO and ZnSO4 also added at 1000 mg/kg), in a total of eight treatments (n = 12/treatment). Pigs were individually housed, and titanium dioxide was included as an indigestible marker in the feed. The digestibility of Zn on day 14 post-weaning was negative for all six Zn sources at 100 mg Zn/kg, indicating insufficient Zn supply. The digestibility of Zn differed according to the Zn source, but the digestibility of Zn from ZnO and ZnSO4 did not differ between processed inorganic or chelated organic sources of Zn. However, the differences in Zn digestibility between Zn sources were not reflected as differences in the serum Zn status, feed intake, gain or probability of diarrhoea.
Subject
General Veterinary,Animal Science and Zoology
Reference41 articles.
1. Commission, Commission Regulation (EC) No 1334/2003 of 25 July 2003 amending the conditions for authorisation of a number of additives in feedingstuffs belonging to the group of trace elements;Off. J. Eur. Union,2003
2. Commission implementing regulation (EU) 2016/1095 of 6 July 2016 concerning the authorization of zinc acetate dihydrate, zinc chloride anhydrous, zinx oxide, zinc sulphate heptahydrate, zinc sulphate monohydrate, zinc chelate of anmino acids hydrate, zinc chelate of protein hydrolysates, zinc chelate of glycine hydrate (solid) and zincchelate of glycine hydrate (liquid) as feed additives for all animal species and amending regulations (EC). No 1334/2003, (EC) No 479/2006, (EU) No 335/2010 and Implementing Regulations (EU) No 991/2012 and (EU) No 636/2013;Off. J. Eur. Union,2016
3. Zinc excretion and retention in growing pigs fed increasing levels of zinc oxide
4. Zn metabolism of monogastric species and consequences for the definition of feeding requirements and the estimation of feed Zn bioavailability
5. Development of an experimental model to assess the bioavailability of zinc in practical piglet diets
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献