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Zervoudakis J.T.,UFMT | Zanin R.,Ciencia Animal | Pesqueira-Silva L.C.R.,Discentes de Doutorado em Ciencia Animal | Hatamoto-Zervoudakis L.K.,UFMT | And 3 more authors.
Semina:Ciencias Agrarias | Year: 2015

The objective was to evaluate the substitution levels of protein from soybean meal by high energy cottonseed (CS) meal in multiple supplements for beef cattle grazing in the dry season on the average daily gain (ADG) and economic viability. Twenty Nellore steers with initial body weight of 351.25±35.38 kg and average initial age of 24±0.8 months were used, divided into four paddocks of Brachiaria brizantha cv. Marandu with 1.6 ha each incompletely randomized design with four animals and five supplements to assess the following supplements: 0CS, 25CS and 50CS corresponding to the level of 0,25 and 50% high energy cottonseed meal to replace the meal soybean, provided the amount of 2 kg/animal/day, which were compared to mineral mixture (MM). The supplement 25CS provided higher (P<0.0001) ADG (0.75kg/animal/day-1) compared to supplement 50CS (0.60kg/animal/day-1). The ADG of animals supplemented with 0CS (0.53kg/animal/day-1) did not differ (P<0.0001) of the ADG of the bulls receiving supplementation with 25CS (0.75k /animal/day-1) and 50CS (0,60kg / animal / day-1). The 25CS supplement showed a higher economic return on invested capital in the period. The use of cottonseed meal high energy level of 25% replacement of soybean meal in multiple supplements provided greater weight gain of cattle and improved economic viability.


Pesqueira-Silva L.C.R.,Discentes de Doutorado em Ciencia Animal | Zervoudakis J.T.,Federal University of Mato Grosso | De Araujo C.V.,Federal University of Mato Grosso | Cabral L.D.S.,Federal University of Mato Grosso | And 3 more authors.
Semina:Ciencias Agrarias | Year: 2015

The objective was to evaluate thein take and digestibility of nutrients, ammonia nitrogen (NH3-N) in the rumen and serum urea nitrogen (BUN) in Nellore heifers in grass Marandu recreated during the transition period dry energy supplement receiving waters, protein and multiple. We used four heifers with average body weight and initial age of 189.5 kg and 12 months respectively, distributed in four paddocks of 0.25 ha each. The design was a 4x4 Latin square (four supplements and four periods of 14 days). The supplements were: energy supplement (ES) protein (PS) and multiple (MS), provided the amount of 1 kg animal day-1 in addition to supplement containing commercial mineral mixture ad libitum (MM). The concentrate supplementation did not increase intakes of dry matter, total organic matter and forage. The additional SP provided greater (P<0,0001) intake of crude protein (CP). The SE and SP supplement resulted ingreater ether extract intake. The CP was higher (P<0.0001) in animals supplemented with SP and SM. Immediately before and four hours after supplementation higher concentrations of ruminal NH3-N were observed for the SM and SP supplements. There were no differences for ser um urea nitrogen (BUN). The use of protein supplement and multiple provided the best fit of the rumen of heifers during the transition period dry-rainy fed on grasses Marandu environment.

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