Title:	Methane emission, milk yield and behavior of ewes kept on pastures or supplemented with concentrate based on corn grain or whole cottonseed.
Authors:	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.
Affiliation:	G. H. M. S. M. F. NOGUEIRA, UNIVASF; R. N. SANTOS, UNIVASF; G. C. GOIS, UNIVASF; DIEGO BARCELOS GALVANI, CNPC; SALETE ALVES DE MORAES, CPATSA; DANIEL MAIA NOGUEIRA, CPATSA; TADEU VINHAS VOLTOLINI, CPATSA.
Date Issued:	2023
Citation:	Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 75, n. 2, p. 293-302, mar./abr. 2023.
Description:	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.
Thesagro:	Efeito Estufa Ovelha Ovino
NAL Thesaurus:	Greenhouse gas emissions Tropical pastures Sheep Ewes Feed concentrates Animal behavior Feed supplements Cynodon
Keywords:	Suplementação concentrada Emissão de gases do efeito estufa Pastagem tropical Produção de leite Grão de milho Caroço de algodão Tifton 85
DOI:	https://doi.org/10.1590/1678-4162-12807
Notes:	Título em português: Emissão de metano, produção de leite e comportamento de ovelhas mantidas em pastagem ou suplementadas com concentrado à base de milho grão ou caroço de algodão.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPC)