Data/hora: 05/06/2024 10:11:09

Provedor de dados: 	96	
País: 	Brazil	
Título: 	Leaf tissues degradation of signalgrass hay pretreated with urea and submitted to in vitro digestion	
Autores: 	Gobbi,Kátia Fernanda; Garcia,Rasmo; Ventrella,Marília Contin; Garcez Neto,Américo Fróes; Pereira,Odilon Gomes.	
Data: 	2008-05-01	
Ano: 	2008	
Palavras-chave: 	Ammoniation; Brachiaria decumbens; C4 grass; Histological analyses; Leaf anatomy.	
Resumo: 	An experiment using signalgrass hay treated with increasing urea levels (0, 20, 40, and 80 g/kg of dry matter), and submitted to in vitro digestion times (0, 6, 12, 24 or 72 hours) was conducted to evaluate the effects of ammoniation rates and digestion times on leaf blade tissue degradation. A completely randomized design with a 4 × 5 factorial treatment arrangement, with three replicates was used. Data were submitted to multivariate analysis. Urea-treated hay presented smaller proportion of remaining tissues measured in leaf blades cross-sections after in vitro digestion. Tissues more affected by urea treatment degradation were parenchyma bundle sheath and sclerenchyma. The hay treated with 80 g urea/kg DM and in vitro digested for 24 or 72 hours showed smallest proportion of tissues with thick and lignified cell walls such as parenchyma bundle sheath and sclerenchyma. The treatment with urea also reduced the time necessary to tissue degradation. The urea-treated hay in vitro digested for 12 hours, showed the same tissue proportion found in untreated hay submitted to 24 or 72 hours of in vitro digestion. The epidermis and lignified vascular tissue showed the smallest degradation following in vitro digestion. Results indicated that treatment of signalgrass hay with urea contributed to cell wall structure disruption, enhancement of tissues microbial degradation and reduction of the time necessary to digestion.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008000500004	
Editor: 	Sociedade Brasileira de Zootecnia	
Relação: 	10.1590/S1516-35982008000500004	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zootecnia  v.37 n.5 2008	
Fonte: 	info:eu-repo/semantics/openAccess