The objective of this study was to evaluate the effect of bacterial-enzymatic inoculants with different concentrations of fibrolytic enzymes on the fermentation quality and nutritional value of the silage of BRS capiaçu grass. Two bacterial-enzymatic inoculants with different levels of enzyme complex were evaluated (Silotrato® (5%) and Biotrato® (8%)) and control silage (without additive) according to a completely randomized design with eight replicates. To evaluate the silage aerobic stability, a completely randomized split plot design was used with three treatments (plots) and seven times after opening (subplots). There was no interaction between treatments and times after opening on values of pH (P=0.79). Regarding bacterial-enzymatic inoculants, the silage pH was 21.66% and 16.16% higher in silage without additive (mean of 6.00) compared to silage with 5% and 8% enzyme complex (P < 0.01). There was no difference between treatments on pH (P = 0.08), lactic acid (p = 0.08) and acetic acid (p = 0.64), means of 3.11, 47.31 g dry matter (DM)-1 and 11.19 g DM-1, respectively. There was no difference between treatments for any of the chemical composition variables (P = 0.86). Mean values for DM, crude protein, neutral detergent fiber and total digestible nutrients were 22.31%, 6.65%, 71.15% and 42.07%, respectively. There was a higher concentration of butyric acid in the control silage compared to Silotrato® silage. The control silage and silage treated with Biotrato® presented effluent losses (P = 0.05) 13.99% higher than silage with Silotrato®. For ensiling BRS capiaçu grass, it is recommended to use lactic acid bacteria containing 5% fibrolytic enzymes.
Objetivou-se com este trabalho avaliar o peso ao nascimento, desenvolvimento durante o período de amamentação e peso ao desmame de bezerros terminais oriundos do cruzamento de fêmeas F1 Holandês x Zebu com touros zebuínos. Bezerros ¾ Nelore e Guzerá, foram os que apresentaram maior (P<0,05) média de peso ao nascimento 39 kg. Os filhos de touros da raça Gir, foram os que apresentaram menores (P<0,05) valores para o peso a desmama com média de 163,6 kg, e ganho médio diário de 0,464 kg/dia. O desempenho dos bezerros (a) na fase de cria, apresentou um desenvolvimento continua crescente, em todos os grupos genéticos. No resultado da correlação entre o peso ao nascimento e o peso a desmama, somente o grupo genético com 50% de genes da raça Gir que não obtiveram significância (P>0,05). No resultado da correlação entre o peso ao nascimento e o ganho médio diário, somente os grupos genéticos com 75 e 50% Nelore tiveram efeito significativo (P<0,05). Produtos oriundos do cruzamento de vacas F1 Holandês x Zebu com touros de raças zebuínas são viáveis para os segmentos de recria e engorda da cadeia da carne.
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