Functionality of a next generation biosynthetic bacterial 6-phytase in enhancing phosphorus availability to weaned piglets fed a corn-soybean meal-based diet without added inorganic phosphate
| Autor: | Rosil Lizardo, Trine Christensen, Svend Haaning, Igor Nikolaev, Boris Villca, Arno De Kreij, Deepak E Velayudhan, Yueming Dersjant-Li, Robin Anton Sorg, Rie Mejldal, Hye-Sook Kim, Sina Pricelius, Vincent J. H. Sewalt, Jens Frisbaek Sorensen, Leon Marchal |
|---|---|
| Přispěvatelé: | Producció Animal, Nutrició Animal |
| Rok vydání: | 2019 |
| Předmět: |
Efficacy
Growth performance Phosphorus Bone ash Soybean meal Randomized block design chemistry.chemical_element Calcium Feed conversion ratio Swine Nutrition chemistry.chemical_compound Animal science Food Animals chemistry Animal Science and Zoology Phytase Biosynthetic bacterial 6-phytase Pigs lcsh:Animal culture Errata/Corrigenda Monocalcium phosphate lcsh:SF1-1100 |
| Zdroj: | Animal Nutrition IRTA Pubpro. Open Digital Archive Institut de Recerca i Tecnologia Agroalimentàries (IRTA) Animal Nutrition, Vol 6, Iss 1, Pp 24-30 (2020) |
| ISSN: | 2405-6383 |
| Popis: | The utility of a next generation biosynthetic bacterial 6-phytase (PhyG) in restoring bone ash, bone phosphorus (P) content and performance in piglets depleted in P was evaluated. A total of 9 treatments were tested as follows. Treatment 1, a negative control (NC) diet; treatments 2, 3, 4, NC supplemented with 250, 500 or 1,000 FTU/kg of PhyG; treatments 5, 6, NC supplemented with 500 or 1,000 FTU/kg of a commercial Buttiauxella sp phytase (PhyB); treatments 7, 8, 9, NC supplemented with monocalcium phosphate (MCP) to provide 0.7, 1.4 and 1.8 g/kg digestible P, equating to a digestible P content of 1.8, 2.5 and 2.9 g/kg. The latter constituting the positive control (PC) diet with adequate P and calcium (Ca). The NC was formulated without inorganic P (1.1 g digestible P/kg) and reduced in Ca (5.0 g/kg). Additional limestone was added to treatments 7 to 9 to maintain Ca-to-P ratio between 1.2 and 1.3. A total of 162 crossed Pietrain × (Large White × Landrace) 21-d-old piglets (50% males and 50% females) were fed adaptation diets until 42 d old and then assigned to pens with 2 pigs/pen and 9 pens/treatment in a completely randomized block design. Piglets were fed mash diets based on corn and soybean meal ad libitum for 28 d. At the end of the study, one piglet perpen was euthanized and the right feet collected for determination of bone strength, bone ash and mineral content. Compared with the PC, the NC group had reduced average daily gain (ADG) and increased feed conversion ratio (FCR) during all growth phases and overall, and at d 28 (70 d old) NC pigs had bones with reduced ash, Ca and P content (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|