Abstract
Abstract The aim was to evaluate two nutritional plans with the addition of dosages of carbohydrases enzyme blend on productive performance of grazing Nellore bulls in dry season. A total of 102 Nellore bulls (BW = 294.10 ± 3.35 kg) were equally distributed in six paddocks (17 bulls/paddock) following a completely randomized design in a 2x3 factorial arrangement, being the factors different nutritional plans (2): mineral-proteic supplementation (PS; Fosbovi® Proteico 35) offered at 0,1% BW or mineral-protein-energetic supplementation (PES; Fosbovi® Proteico-Energético 25) offered at 0.3% BW; and levels of enzymatic carbohydrases blend (3):0,00 (control), 4,75 or 9,50 g/animal/day. The enzymatic blend was mainly composed by beta-glucanase and xylanase enzymes (Ronozyme® VP and Ronozyme® WX) and included in the supplements (both enzymes and supplements provided by DSM Nutritional Products Brasil S.A.). Supplement intake and animal weighting were carried out daily and individually by an automatic scale system installed in each paddock, thus, animal was considered the experimental unit. Data were analyzed using PROC MIXED of SAS and means were compared by polynomial regression. A quadratic effect was observed on enzyme level for ADG in both nutritional plans (P = 0.014), with intermediary dosages presenting the highest values of ADG for PS (0,283 vs. 0,188 kg/day) and PES (0.429 vs. 0.391 kg/day), over control respectively. Although no linear and quadratic enzyme effect was observed for final BW (FBW), animals supplemented with PES presented 20,06 kg higher FBW compared to PS (341,63 vs. 321,57 kg, P < 0.001). An increasing linear effect was observed for supplement intake (kg/day), for both PS and PES (P = 0.020). According the polynomial regression, it is recommended to include 4.67 g/day of carbohydrases blend in PS and 3.77 g/day in PES, being the carbohydrases blend a viable technology to grazing cattle. Moreover, mineral-protein-energetic supplementation can optimize Nellore bulls performance during dry season.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
