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oai:recercat.cat:20.500.12327/8592025-10-22T11:20:25Zcom_2072_4428com_2072_4427col_2072_487898

Effects of exogenous glucoamylase enzymes alone or in combination with a neutral protease on apparent total tract digestibility and feces D-Lactate in crossbred angus bulls fed a ration rich in rolled corn Devant, Maria Yu, Shukun Genís, Sandra Larsen, Torben Wenting, Li Producció Animal Producció de Remugants 63 The aim of this study was to evaluate the effect of two glucoamylases (GA) and the combination of one GA with a neutral protease on apparent total tract digestibility in beef bulls fed a total mixed ration (TMR) rich in rolled corn. Sixteen Angus beef bulls (266 ± 4.9 kg of initial BW, and 182 ± 1.7 d of age) were distributed in 4 blocks, each block consisted of 4 animals balanced by BW. The experimental design was a 4 × 4 Latin square (4 blocks and 4 periods, 2 w per period). Four treatments were tested; (1) control, (2) GA preparation from Trichoderma reesei (TrGA); (3) GA from Aspergillus fumigatus (AfuGA); (4) AfuGA in combination with a neutral protease from Bacillus amyloliquefaciens (BamPro). Apparent total tract digestibility and fecal D-lactate concentration were analyzed. Enzyme supplementation, regardless of enzyme type, increased apparent total tract digestibility of dry matter (from 66.7% to 73.1% ± 2.01), and starch (from 74.7% to 81.8% ± 2.25), without affecting feces D-lactate concentration. Irrespective of glucoamylase type, glucoamylase supplementation improved apparent digestibility of dry matter and starch, and the addition of a protease did not have additional benefits on nutrient digestibility info:eu-repo/semantics/publishedVersion 2020-06-23 info:eu-repo/semantics/article Devant, Maria, Shukun Yu, Sandra Genís, Torben Larsen, and Li Wenting. 2020. "Effects Of Exogenous Glucoamylase Enzymes Alone Or In Combination With A Neutral Protease On Apparent Total Tract Digestibility And Feces D-Lactate In Crossbred Angus Bulls Fed A Ration Rich In Rolled Corn". Animals 10 (6): 1077. doi:10.3390/ani10061077. 2076-2615 http://hdl.handle.net/20.500.12327/859 https://doi.org/10.3390/ani10061077 eng Animals Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 8 MDPI