Crude glycerin as an alternative to corn as a supplement for beef cattle grazing in pasture during the dry season

Autor(es)

San Vito, Elias ^[1] ; Granja-Salcedo, Yury Tatiana ^[1] ; Lage, Josiane Fonseca ^[2] ; Oliveira, Andre Soarez ^[3] ; Gionbelli, Mateus Pies ^[4] ; Messana, Juliana Duarte ^[1] ; Dallantonia, Erick Escobar ^[5] ; Reis, Ricardo Andrade ^[5] ; Berchielli, Telma Teresinha ^[5]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Fac Ciencias Agr & Vet, Dept Zootecnia, Jaboticabal, SP - Brazil

^[2] Trouw Nutr Brazil, R&D, Campinas, SP - Brazil

^[3] UFMT, Inst Ciencias Agr & Ambientais, Campus Sinop, Sinop, MT - Brazil

^[4] Univ Fed Lavras UFLA, Dept Zootecnia, Lavras, MG - Brazil

^[5] UNESP, Fac Ciencias Agr & Vet, Dept Zootecnia, Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SEMINA-CIENCIAS AGRARIAS; v. 39, n. 5, p. 2215-2232, 2018.
• Citações Web of Science: 0

Resumo

Two experiments were conducted to evaluate the effects of inclusion of crude glycerin (CG) in the supplement (0, 70, 140, 210, and 280 g kg(-1) dry matter (DM) of supplement) of Nellore cattle grazing tropical grasses during dry season. In Experiment 1, intake, digestibility, ruminal fermentation, and the rumen microbial profile were evaluated in two simultaneous 5 x 5 Latin squares, using 10 ruminally cannulated Nellore steers (408.8 +/- 38.5 kg of body weight (BW)). In Experiment 2, cattle growth performance was evaluated in 50 young Nellore bulls (279.52 +/- 16.3 kg of BW) distributed in a randomized complete block design. The increasing inclusion of CG did not affect intake (P=0.813), diet digestibility (P=0.895), however linearly increased pH (P=0.001), butyrate concentration (P < 0.001) and Fibrobacter succinogenes (P=0.003) population. CG inclusion linearly decreased total ruminal volatile fatty acids (VFA) (P < 0.001), acetate concentration (P < 0.001) and quadratically affected (P=0.009) acetate: propionate ratio. In experiment 2, the inclusion of CG quadratically affected DM intake (DMI) (P=0.005), DM total-tract apparent digestibility (P < 0.001), linearly increased additional gain (P> 0.001), average daily gain (P > 0.001) and feed efficiency (P > 0.001). CG in the supplement of Nellore steers grazing tropical grass during dry season doesn't affect intake and digestibility but alters ruminal fermentation, without negative effect on relative proportion of cellulolytic bacteria population. The increasing replacement of corn grain by CG in the supplement of pasture-raised growing Nellore bulls (up to 280g/kg DM) improved BW gain and consequently feed efficiency. (AU)

• Processo FAPESP: 13/23851-6 - Métodos de extração de DNA para o estudo da população microbiana ruminal em bovinos alimentados com glicerina associado ao óleo
• Beneficiário: Yury Tatiana Granja Salcedo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/00060-8 - Balanço de gases de efeito estufa e estratégias de mitigação em pastos de Brachiaria submetidos a diferentes manejos
• Beneficiário: Telma Teresinha Berchielli
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/06409-2 - Glicerina bruta oriunda da agroindústria do biodiesel na suplementação de novilhos de corte criados a pasto
• Beneficiário: Elias San Vito
• Modalidade de apoio: Bolsas no Brasil - Doutorado