Soybean meal as a replacement for urea on growing beef steers diets / Farelo de soja em substituição à ureia em dietas para bovinos de corte em crescimento
José de Resende Fernandes, Juliano; Vaz Pires, Alexandre; Cunha de Oliveira Jr., Reinaldo; Augusto Portela Santos, Flávio; Susin, Ivanete; Rodrigues de Carvalho, Eduardo.
Ciênc. anim. bras. (Impr.)
; 10(2): 373-378, 2009.
Artículo
en Portugués
|
LILACS-Express
| ID: biblio-1472784
The aim of this trial was to evaluate if non-castrated growing beef steers in feedlot systems would respond to increasing levels of metabolizable protein in the diet estimated by NRC (1996, Level I), through the addition of soybean meal in substitution of urea. Thirty-six steers (24 Nelore and 12 Canchim) with liveweight of 230 kg and 15 months of age were assigned in a completely randomized block design. Diets were formulated according to NRC (1996, Level I) in order to obtain a positive rumen degradable protein balance and sufficient metabolizable energy to ensure an average daily gain (ADG) of 1.3 kg/animal/day in all treatments, which were urea (U), soybean meal + urea (FSU) and soybean meal (FS). Dry matter intake (DMI) was not affected by treatments (P>0.05). ADG was lower (P
Biblioteca responsable:
BR68.1
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