Utilization of by-product feeds to maintain animal performance while decreasing feed cost in post-weaning beef cattle development programs
Lourenco, Jeferson Menezes
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Two experiments were conducted to evaluate the utilization of alternative diets in beef cattle operations. The first experiment evaluated the use of three diets, which were offered to developing bulls. Of these three diets, one was a commercial diet whereas the other two were alternative diets based on by-products from the corn and soybean industries (soybean hulls, corn gluten feed, and dried distillers grains plus solubles). Additionally, the experimental diets were subjected to in vitro digestion for evaluation of fermentation end products. The alternative diets reduced the cost of gain. In the second experiment, three protein supplements were tested in a stocker system based on corn silage. The three supplements were: soybean meal, canola meal, or sunflower meal. Rations containing these supplements were used in feeding trials and also as substrates for in vitro fermentations. Rations containing either canola or sunflower meals decreased the daily feeding cost per animal.