Autoria: NOGUEIRA, G. H. M. S. M. F.; SANTOS, R. N.; GOIS, G. C.; GALVANI, D. B.; MORAES, S. A. de; NOGUEIRA, D. M.; VOLTOLINI, T. V.

Resumo: This study aimed to evaluate methane emission, milk yield and behavior of ewes kept exclusively on irrigated pasture of Tifton 85 grass (Cynodon spp.) or supplemented with ground corn or whole cottonseed (WCS) based concentrates. Twelve Lacaune x Santa Ines ewes (43.07±0.83 kg of body weight, 77±24 days after parturition, on average) were distributed in replicated 3x3 Latin square. Treatments consisted of three diets: pasture (no concentrate supplementation); corn (pasture + corn-based supplement); whole cottonseed (pasture + whole cottonseed-based supplement), offering 0.5 kg/ewe/day. The WCS group showed the highest concentrate dry matter intake (DMI) (p=0.049) and crude protein (CP) intake (p=0.001) compared to the others. There was no difference on total DMI (p=0.115) for the tested diets. Animals exclusively kept on pasture had the greatest forage DMI (p=0.004), lowest CP digestibility (p=0.015), showed longer grazing time (p=0.01) and shorter idle time (p=0.01) compared to the supplemented groups. Milk yield (0.36 kg/ewe/day) (p=0.15) and methane emission (33.12 g/ewe/day) (p=0.95) were similar for all three evaluated groups. Supplementation with concentrate based on corn or whole cottonseed does not improve productive performance nor decrease methane emission. However, lactating ewes kept exclusively in pasture show longer grazing time, without changes in milk yield and methane emission.

Ano de publicação: 2023

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Caprinos e Ovinos

Palavras-chave: Animal behavior, Caroço de algodão, Cynodon, Efeito Estufa, Emissão de gases do efeito estufa, Ewes, Feed concentrates, Feed supplements, Greenhouse gas emissions, Grão de milho, Ovelha, Ovino, Pastagem, Pastagem tropical, Produção de leite, Sheep, Suplementação concentrada, Tifton 85, Tropical pastures