Levels of supplementation in the performance for beef heifers, in granzing, during the dry season.

Productive performance of crossbreds Nellore beef heifers, in the growing stage receiving different supplement levels for three months grazing Brachiaria decumbens pasture were evaluated. The area was divided in five paddocks of 2.5 ha, with dry matter availability and potentially of dry matter digestible of 3.85 and 2.12 t/ha, respectively. Forty beef heifers of 191 ± 3.99 kg initial weight and 8.5 ± 0.15 months of age were assigned in a completely randomized experimental design with five treatments, and four supplementation levels. Mineral mixture (MM) (60 g/day) and multiple supplements, formulated to supply different supplementation levels in the amounts of 0.5, 1.0, 1.5 and 2.0 kg/animal more MM (60 g/day) were evaluated. The supplement had 300 g of crude protein/kg. Animals not responded significantly (P > 0.05) to the use of multiples supplements to final body weight. However, the heifers than received supplement won more weight (P £ 0.01) (372 g vs. 92g of average daily gain), in addition to highers (P £ 0.01) serum N-urea levels (20.14 vs. 12.09 mg/dL), when compared with heifers fed diets supplied only with mineral mixture. In conclusion, increasing the amount of protein supplement during the dry season, increased of performance of beef heifers. However, despite increase productive performance and intake of energy during dry season, additional higher levels of supplementation resulted in lower increment in growth.

Bibliographic Details

Main Authors:	PORTO, M. O., PAULINO, M. F., VALADARES FILHO, S. C., DETMANN, E., SALES, M. F. L., CAVALI, J., COUTO, V. R. M., MONNERAT, J. P. I. S., ASSIS, A. A. R.
Other Authors:	Universidade Federal de Rondônia (Unir); Universidade Federal de Viçosa (UFV); Universidade Federal de Viçosa (UFV); Universidade Federal de Viçosa (UFV); MAYKEL FRANKLIM LIMA SALES, CPAF-AC; Universidade Federal de Rondônia (Unir); Universidade Federal de Viçosa (UFV); Universidade Federal de Viçosa (UFV); Universidade Federal de Rondônia (Unir).
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2014-07-09
Subjects:	Pastos forrajeros, Pastizales, Ganado de carne, Alimentación de ganado, Nutrición animal, Suplementos dietéticos minerales., Raza de bovinos Nelore, Gado de corte, Gado Nelore, Nutrição animal, Suplemento mineral, Pastagem, Gramínea forrageira, Capim Brachiaria, Brachiaria decumbens, Ganho de peso, Beef cattle, Nellore, Animal nutrition, Dietary mineral supplements, Pastures, Forage grasses, Cattle feeding.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/990138
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