| Registro completo |
| Provedor de dados: |
Repositório Alice
|
| País: |
Brazil
|
| Título: |
Long-Term encapsulated nitrate supplementation modulates rumen microbial diversity and rumen fermentation to reduce methane emission in grazing steers.
|
| Autores: |
GRANJA-SALCEDO, Y. T.
FERNANDES, R. M.
ARAUJO, R. C. de
KISHI, L. T.
BERCHIELLI, T. T.
RESENDE, F. D. de
BERNDT, A.
SIQUEIRA, G. R.
|
| Data: |
2019-04-03
|
| Ano: |
2019
|
| Palavras-chave: |
Archaea diversity
Enteric methane emission
Gado de Corte
Nitrato
Beef cattle
Rumen bacteria
Fatty acids
|
| Resumo: |
This study investigated the long-term effects (13 months) of encapsulated nitrate supplementation (ENS) on enteric methane emissions, rumen fermentation parameters, ruminal bacteria, and diversity of archaea in grazing beef cattle. We used a total of thirty-two Nellore steers (initial BW of 197 15.3 kg), 12 of which were fitted with rumen cannulas. For 13 months, the animals were maintained in 12 paddocks and fed a concentrate of ground corn, soybean meals, mineral supplements, and urea (URS) or encapsulated nitrate (EN) containing 70 g of EN/100 kg of BW (corresponding to 47 g NO3/100 kg BW). Encapsulated nitrate supplementation resulted in similar forage, supplement and total DMI values as URS (P > 0.05), but ENS tended to increase (C48 g/d; P = 0.055) average daily weight gain. Daily reductions in methane emissions (- 9.54 g or 18.5%) were observed with ENS when expressed as g of CH4/kg of forage dry matter intake (fDMI) (P = 0.037). Lower concentrations of NH3-N and a higher ruminal pH were observed in ENS groups 6 h after supplementation (P < 0.05). Total VFA rumen concentration 6 h (P = 0.009) and 12 h after supplementation with EN resulted in lower acetate concentrations in the rumen (P = 0.041). Steers supplemented with EN had a greater ruminal abundance of Bacteroides, Barnesiella, Lactobacillus, Selenomonas, Veillonella, Succinimonas, Succinivibrio, and Duganella sp. (P < 0.05), but a lower abundance of Methanobrevibacter sp. (P = 0.007). Strong negative correlations were found between daily methane emissions and Proteobacteria, Erysipelotrichaceae, Prevotellaceae, and Roseburia, Kandleria, Selenomonas, Veillonella, and Succinivibrio sp. (P < 0.05) in the rumen of ENS steers. Encapsulated nitrate is a feed additive that persistently affects enteric methane emission in grazing steers, thereby decreasing Methanobrevibacter abundance in the rumen. In addition, ENS can promote fumarate-reducer and lactateproducer bacteria, thereby reducing acetate production during rumen fermentation.
bitstream/item/195343/1/Long-Term-Encapsulated-Nitrate.pdf
|
| Tipo: |
Artigo em periódico indexado (ALICE)
|
| Idioma: |
Inglês
|
| Identificador: |
24752
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1107883
|
| Editor: |
Frontiers in microbiology, v. 10, n. 614, p. 1-12, 2019.
|
| Relação: |
Embrapa Pecuária Sudeste - Artigo em periódico indexado (ALICE)
|
|
