The effect of dietary phytase supplementation on the N-balance of growing pigs
| Autor: | Veronika Halas, Beáta Kiss, László Babinszky, Mat Winkelmolen |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Italian Journal of Animal Science, Vol 8, Iss 3s, Pp 145-147 (2010) |
| Druh dokumentu: | article |
| ISSN: | 1594-4077 1828-051X |
| DOI: | 10.4081/ijas.2009.s3.145 |
| Popis: | Some studies suggest that dietary phytase enhance the growth rate of pigs fed P-adequate diets. This may be due to an increased N digestibility and/or improved protein gain. The aim was to study the effect of dietary phytase supplementation on the N-balance of growing pigs upon protein limiting condition. A total of 24 hybrid individually kept barrows (25kg BW) were assigned into 4 treatments. Diet in AP0 (AP: adequate protein) contained 190g/kg crude protein and no phytase supplementation, diets in RP0, RP500 and RP1000 (RP: reduced protein) contained 160g/kg crude protein and 0, 500 and 1000 FTU/kg phytase supplementation, respectively. The balance trial consisted of 7 days adaptation and 5 days collection, during which the feces and urine were collected quantitatively. Additional phytase to low protein diets increased the N-retention of the pigs (P0.05). Dietary treatments did not affect the digestibility of protein, however, 500 FTU/kg phytase supplementation increased the efficiency of N-retention. Our results show that the protein content of the feed for pigs of 20-30kg can be reduced from 190 to 160 g/kg if the diet is supplemented with 500 FTU/kg phytase without weakening the N-balance of pigs. |
| Databáze: | Directory of Open Access Journals |
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