02932nam a2200505 a 450000100080000000500110000800800410001910000170006024501260007726000970020330000100030049000100031052014580032065000210177865000160179965000190181565000320183465000190186665000120188565000130189765000250191065000210193565000180195665000160197465000180199065000250200865000220203365000130205565000230206865300280209165300200211965300220213965300150216165300220217665300270219865300380222570000190226370000270228270000160230970000200232570000150234570000200236070000260238070000200240619901382021-07-06       2014    bl uuuu     u00u1 u    #d1 aPORTO, M. O.  aLevels of supplementation in the performance for beef heifers, in granzing, during the dry season.h[electronic resource]  aIn: ASAS WESTERN SECTION, 2014, San Angelo. Proceedings... Texas: ASAS Western Sectionc2014  av. 65  vv. 65  aProductive 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 &gt 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.  aAnimal nutrition  aBeef cattle  aCattle feeding  aDietary mineral supplements  aForage grasses  aNellore  aPastures  aBrachiaria decumbens  aCapim Brachiaria  aGado de corte  aGado Nelore  aGanho de peso  aGramínea forrageira  aNutrição animal  aPastagem  aSuplemento mineral  aAlimentación de ganado  aGanado de carne  aNutrición animal  aPastizales  aPastos forrajeros  aRaza de bovinos Nelore  aSuplementos dietéticos minerales1 aPAULINO, M. F.1 aVALADARES FILHO, S. C.1 aDETMANN, E.1 aSALES, M. F. L.1 aCAVALI, J.1 aCOUTO, V. R. M.1 aMONNERAT, J. P. I. S.1 aASSIS, A. A. R.