Artículos de revistas
The effect of drying and urea treatment on nutritional and anti-nutritional components of browses collected during wet and dry seasons
Fecha
2005-08-19Registro en:
Animal Feed Science and Technology. Amsterdam: Elsevier B.V., v. 122, n. 1-2, p. 123-133, 2005.
0377-8401
10.1016/j.anifeedsci.2005.04.007
WOS:000231325000010
9790998212635563
0000-0003-1854-2927
Autor
Universidade de São Paulo (USP)
Universidade Federal de Lavras (UFLA)
Universidade Estadual Paulista (Unesp)
Inst Zootecnia
Universidade Federal Rural de Pernambuco (UFRPE)
Univ Reading
Institución
Resumen
Fibre, crude protein and tannin concentrations were measured in browse species from the semi-arid region of Northeast Brazil during the dry and wet seasons. The effects of oven-, sun- and shade-drying and of urea treatment were also determined. Crude protein (CP) content varied from 103 to 161 g/kg dry matter (DM) and the browses had similar CP content in the two seasons (during 2002) (102-161 and 107-153 g/kg DM in the wet and dry seasons, respectively). Total tannin concentrations ranged from 13 to 201 g/kg DM amongst the browses and were higher in the dry season. A 30-d treatment with urea reduced extractable tannins significantly (P < 0.05). The urea treatment was also most effective at reducing the in vitro effects of tannins compared to the other drying treatments. This was demonstrated by measuring the effect of polyethylene glycol (PEG) on gas production. Addition of PEG increased gas production of oven- (81.4%), sun- (78.5%) and shade-dried (76.7%) samples much more compared to urea treated samples (10.9%). (c) 2005 Elsevier B.V. All rights reserved.