1. β-mannanase supplemented in diets saved 85 kcal of metabolizable energy/kg, supporting performance, improving nutrient digestibility and fecal microbiome in pigs
- Author
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Jansller Luiz Genova, Liliana Bury Azevedo, Paulo Evaristo Rupolo, Flávia Beatriz Carvalho Cordeiro, Silvana Teixeira Carvalho, Marcos Kipper, Hellen Lazarino Oliveira Vilela, Pedro Silva Careli, Luciana Navajas Rennó, Paulo Levi Oliveira Carvalho, and Juliana Canto Faveri
- Abstract
The effects of β-mannanase supplementation in metabolizable energy (ME)-reduced diets containing xylanase-phytase were investigated on performance, fecal score, carcass attributes, blood profile, apparent total tract digestibility (ATTD), digesta passage rate, and fecal microbiome in grower pigs (n = 40, 26.09 ± 0.96 kg) randomly assigned within 4 treatments: a control diet containing isolated phytase and xylanase valued at 40 kcal of ME/kg (CD0), CD0 + β-mannanase (0.3 g/kg valued at 30 kcal of ME/kg) (CD70), CD0 + β-mannanase (0.3 g/kg valued at 45 kcal of ME/kg) (CD85), and CD0 + β-mannanase (0.3 g/kg valued at 60 kcal of ME/kg) (CD100). Performance was supported. Pigs with CD100 had lower serum IL-1β concentration, and lower IL-10 was observed in pigs on CD0 than those fed β-mannanase. Greater ATTD was evidenced in animals fed CD85 or CD100. Pigs with CD85 had higher alpha diversity richness but lower Firmicutes:Bacteroidota ratio. Acidaminococcaceae and Ruminococcaceae were more abundant in pigs fed CD0, but lower for Christensenellaceae NSJ-63 and NSJ-63 sp014384805. Pigs in CD85 showed higher abundance of Bacteroidaceae and Prevotella, and lower of Streptococcaceae and Streptococcus. In conclusion, supplementation of β-mannanase in diets containing xylanase-phytase saved 85 kcal of ME/kg by supporting performance, improving nutrient digestibility and fecal microbiome in grower pigs.
- Published
- 2023
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