Desempenho de bovinos de corte alimentados com dietas à base de silagens e rolao de milho amonizados

The experiment was conducted with the objective to evaluate the feedlot performance of beef cattle, fed diets silage and corn fodder based, submitted or not to ammoniation. The silage presented dry matter content from 30 to 35 percent and from 42 to 47 percent, being applied 1,2 percent of anhydrous ammonia in relation to their dry matters. For the corn fodder (from 75 to 85 percent DM), 2.4 percent of anhydrous ammonia were added in relation to their dry matters. The intake of DM (DMI), of crude protein (CPI) and neutral deter" fiber (NDFI) and the daily weight gain (DWG) were determined. Crossbred European-Zebu steers were distributed in a completely randomized block design, with six treatments, four replicates and two animals per replicate. Differences were not observed on DMV NDFL For the CCP there were differences among animals fed diets based on ammoniated silage with dry matter content from 30 to 3 (1.08kg/day) and the no-ammoniated corn fodder (.83kg/day). The highest DGW was obtained with diets based on no-ammoniated, silage with 30-35 percent of dry matter (1.167kg/day) and the smallest for those based on no-ammoniated corn fodder (.727kg/day). The ammoniation of forage did not improve the performance of the animals. (RA)