Data/hora: 04/06/2024 12:14:20

Biblioteca(s): 	Embrapa Gado de Leite; Embrapa Semiárido.	
Data corrente: 	10/01/2020	
Data da última atualização: 	06/02/2024	
Autoria: 	SILVA, A. S.; PEREIRA, L. G. R.; PEDREIRA, M. dos S.; MACHADO, F. S.; CAMPOS, M. M.; CORTINHAS C. S.; ACEDO, T. S.; SANTOS, R. D. dos; RODRIGUES, J. P. P.; MAURICIO, R. M.; TOMICH, T. R.	
Afiliação: 	Abias Santos Silva; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; Márcio dos Santos Pedreira; FERNANDA SAMARINI MACHADO, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL; Cristina Simões Cortinhas; Tiago Sabella Acedo; RAFAEL DANTAS DOS SANTOS, CPATSA; João Paulo Pacheco Rodrigues; Rogério Martins Maurício; THIERRY RIBEIRO TOMICH, CNPGL.	
Título: 	Effects of exogenous amylase on the in vitro digestion kinetics of whole-crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Journal of Animal Physiololgy and Animal Nutrition, v. 104, n. 1, p. 76-87, 2020.	
DOI: 	https://doi.org/10.1111/jpn.13234	
Idioma: 	Inglês	
Conteúdo: 	The effect of exogenous amylase on the in vitro rumen digestion kinetics of wholecrop maize silage made from dent (RB9004) or flint grain type (RB9308) was evaluated at different phenological stages: soft dough (SOD), early dent (EAD), ½ milkline (½M) and ¾ milkline (¾M). Forage was harvested from 70 to 110 days after sowing. Two rumen-cannulated cows receiving or not exogenous amylase (0.7 g/kg dry matter-DM, provided to achieve 396 kilo Novo units of amylase activity/kg of TMR DM) were used as donor of ruminal fluid. The in vitro gas production kinetics was evaluated according to a dual?pool logistic model. The chemical composition and gas production kinetics were affected by the hybrid and phenological stages. The flint hybrid had lower range for chemical analysis among physiological stages. Harvesting at ½M and ¾M improved DM content, bromatological composition and silage quality parameters compared to dent or flint types. Amylase (i) increased methane (CH4) production and in vitro dry matter digestibility (IVDMD) in ½M stage, (ii) improved digestion kinetics by reducing lag time and increasing total gas production and fermentation rates of non?fibrous carbohydrates (NFC) and fibrous carbohydrates (FC), and (iii) increased extent and fermentation rate of NFC and increased fermentation rate of FC fraction in whole?crop maize silages produced from dent or flint types in all phenological stages. Harvesting between ½M and ¾M is the best phenological stage to improve chemical composition and silage quality parameters. Exogenous amylase showed improvements on fibre digestion of silages at ½M and ¾M phenological stages in both grain types of corn.	
Palavras-Chave: 	Carboidratos; Digestão in vitro; Tempo de colheita.	
Thesagro: 	Digestibilidade; Enzima; Metano; Milho; Silagem.	
Thesaurus Nal: 	Corn silage; Grass silage; Silage.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (24959-1) - UPC - AP - DD -  -  -  - DIS
CPATSA - (59039-1) - UPC - AP - DD -  -  -  - DIS