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Our objective was to evaluate the effects of increasing doses of whole raw soybeans (WRS) in beef steer and dairy cow (high and medium milk yield) diets on dry matter intake (DMI), nutrient total apparent digestibility, excretion and composition of soybeans particles on feces. Three trials were performed into replicated 4x4 Latin square design, with 14 d of adaptation and 4 d of sampling. Trials were composed by the follow animal categories: 1) 12 Nellore steers, with average live weight of 420±28.5 kg, and 24±3.5 months age; 2) 12 Holstein cows, with average body weight of 580 ± 23.5 kg, 90 ± 14.6 DIM and 30±2.7 kg/d of milk yield; 3) 16 Holstein cows, with average body weight of 580 ± kg, 228 ± DIM and 23±kg/d of milk yield;. The experimental diets in the trials 1 and 3 were: G0) diet without WRS; G8) inclusion of 8% of WRS on diet DM basis; G16) inclusion of 16% of WRS on diet DM basis; and G24) inclusion of 24% of WRS on diet DM basis. In the trial 2 were use diets containing 0, 9, 18 and 27% of WRS inclusion on diet DM basis (G0, G9, G18 and G27, respectively). The WRS inclusion decreased (p 0.05) by increasing doses of WRS in diets. Average body weight gain of Nellore steers and fat corrected milk of Holstein cows were not altered (p>0.05) by WRS diet inclusion. Whole raw soybeans intake and excretion of soybeans particles increased linearly (p 0.05) by treatments, regardless of the dietary WRS. According to the studies, increasing levels of whole raw soybean may be added to cattle diets without decrease in nutrient utilization and impair animal performance.

Grão de soja cru e inteiro na alimentação de bovinos: excreção de grão de soja nas fezes