Degradação ruminal e cinética de fermentação do capim mulato II (Convert HD364) sob diferentes fontes de adubação nitrogenada
Nenhuma Miniatura disponível
Data
2023-10-02
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
It is important to evaluate nutritional value of new grass species, which can be better characterized through rumen
fermentation and degradation techniques. The aim was to evaluate the effects of Nitrogen (N) fertilization on the kinetics of
fermentation and ruminal degradation of the Mulato II grass. Two distinct sources of N (common and protected urea) were
used during two periods of the year (summer - I and autumn - II). A completely randomized experimental design was used,
in a 2x4 factorial arrangement with three replicates. Fraction A changed based on N dosage. The passage rate (K) and
effective degradability (ED) were influenced by sources and doses of N, while Fraction B and Lag Time were not influenced
during period I. Fractions A and B and EDs were all influenced by N sources and doses during period II. Lag time and
potential degradability were influenced by N sources only. Among the kinetics parameters of dry matter ruminal
fermentation obtained during period I, only K1 was influenced by the interaction between N doses x sources, while the
remaining parameters were only influenced by the N doses applied. As for period II, with the exception of K2, all remaining
parameters were influenced by the interaction of N doses and sources. Protected urea improved fermentation parameters
during period I. The dose equivalent to applying 150kg/ha positively influenced ruminal fermentation parameters of the
Mulato II grass mainly in the summer. The use of protected urea as a Nitrogen source improved fermentation parameters in
the summer.
Descrição
Palavras-chave
Braquiária, Cinética da digestão, Digestibilidade, Fermentação ruminal, Produção de gás, Brachiaria, Digestibility, Digestion kinetics, Rumen fermentation, Gas production
Citação
JACOVETTI, Reginaldo et al. Degradação ruminal e cinética de fermentação do capim mulato II (Convert HD364) sob diferentes fontes de adubação nitrogenada. Ciência Animal Brasileira, Goiânia, v. 24, e-75660P, 2023. DOI: 10.1590/1809-6891v24e-75660P. Disponível em: https://revistas.ufg.br/vet/article/view/75660/40269. Acesso: em 22 dez. 2023.