Título:	Analysis of NH3-N slow release systems for fiber digestibility of low-quality forage: in vitro approach.
Autoria:	CRUZ, C. C. T. da PEREIRA, E. I. SATO, P. S. GUIMARÃES, G. G. F. SOUZA, G. B. de BERNARDI, A. C. de C. OLIVEIRA, C. R. de
Afiliação:	Camila Conceição Tomé da Cruz, UFSCar; Elaine Inácio Pereira, UFSCar; Patrícia Suemi Sato, UFSCar; Gelton Geraldo Fernandes Guimarães, Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina; GILBERTO BATISTA DE SOUZA, CPPSE; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; CAUE RIBEIRO DE OLIVEIRA, CNPDIA.
Ano de publicação:	2020
Referência:	Scientia Agricola, v. 77, n. 5, e20180005, dec. 2020.
Conteúdo:	Urea is a common non-protein supplement used in ruminant feed; however, excessive consumption may lead to poisoning by NH3. Although the slow release of urea into the rumen has shown to be an essential aspect for ruminant feed, to date only a few studies have addressed this matter. In this study we examined the influence of five different NH3-N slow release systems based on clay-urea nanocomposites on the fiber digestibility of low-quality forage (sugarcane straw) in vitro. Physical properties of nanocomposites were evaluated and their effects on digestibility were tested in vitro using pristine urea as a positive control (level of 1 % of DM of sugarcane straw sample) and sugarcane (with no additives) as a negative control. Ammonia release and digestibility were evaluated at 12, 24, 36, 48, 72 and 96-h. Generally, all nanocomposites increased (p < 0.05) digestibility of fiber over control under all the conditions stipulated, but the samples with hydrogel content were more expressive. We concluded that an ideal release rate and optimum environment for microbial synthesis are necessary to maximize the digestion of sugarcane.
Palavras-chave:	Slow release urea Ruminants feed Non protein nitrogen
ISSN:	1678-992X
Digital Object Identifier:	http://dx.doi.org/10.1590/1678-992x-2018-0383
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)