Session: Ruminant Nutrition III: Feedlot Nutrition

314 - Carbohydrases Enzymes Improve the Productive Performance of Grazing Nellore Bulls Fed Different Nutritional Plans During the Rainy Season

Friday, July 16, 2021

11:15 AM – 11:30 AM EST

Location: Kentucky International Convention Center (KICC), L005/009

Author(s)

AA

Anderson Acosta

Universidade Estadual de Maringá, Umuarama-PR, Brazil
Umuarama, Parana

Presenting Author(s)

Alexandre Perdigão, PhD

Analyst
DSM Nutritional Products Brazil S.A.
Rio Brilhante, Mato Grosso do Sul

PDF Slides and Audio

Author(s)

GV

Guilherme S. Vasconcellos

Innovation and Applied Science Coordinator
DSM Nutritional Products Brazil S.A.
São Paulo, Sao Paulo
Victor Valério de Carvalho, PhD

Innovation and Applied Science Supervisor
DSM Nutritional Products Brazil S.A.
São Paulo, Sao Paulo
TA

Tiago S. Acedo

DSM Nutritional Products Brazil S.A.
São Paulo, Sao Paulo
CP

Cibele Pedrini

Universidade Federal da Grande Dourados- MS, Brazil
Dourados, Mato Grosso do Sul
JG

Jefferson Gandra

Universidade Federal do Sul e Sudeste do Pará- PA, Brazil
Marába, Para

The aim with this trial was to evaluate two nutritional plans with the addition of dosages of carbohydrases enzyme blend on productive performance of grazing Nellore bulls in rainy season. One hundred and two contemporary Nellore steers (BW = 294.10 ± 3.35 kg) were equally distributed in six paddocks (17 steers/paddock) following a completely randomized design in a 2x3 factorial arrangement, being the factors two nutritional plans: mineral-proteic supplementation (Fosbovi^®Proteico 30; PS) offered at 0,1% BW or mineral-protein-energetic supplementation (Fosbovi® Proteico-Energético 25; PES) offered at 0.3% BW); and three levels of enzymatic carbohydrases blend (0, 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); Both enzymes and supplemented were 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. Data were analyzed using PROC MIXED of SAS and means were compared by polynomial regression. Animals that received PES had greater ADG (0.896 vs. 0.775 kg/day; P < 0.001) compared to those fed PS. Intermediary level (4.75 g/day) of carbohydrate enzymes also presented the highest ADG in PES compared to 0.0 level (0.941 vs. 0.896 kg/day; P = 0.006). Still, higher enzyme levels (9.5 g/day) presented greater ADG on PS, when compared to 0.0 level (0.852 vs. 0.775 kg/day, P = 0.006). PES animals presented greater intake, compared to PS (1.112 vs. 0.432 kg/day, P < 0.001). According to polynomial regression, it is recommended to include 4.75 g/day of these carbohydrases enzymes in PS and 4.39 g/day in PES for growing Nellore bulls in rainy season.