364 The Effects of Replacing Dried Distillers Grains with Solubles with a Heat-Treated Soybean Meal in Forage-Based Growing Cattle Diets
Abstract This study aimed to evaluate the effects of increased concentrations of metabolizable protein and lysine from heat-treated soybean meal (TSBM) in forage-based growing cattle diets predicted to have positive metabolizable protein balance. Seventy Angus-based steers (298 ± 16 kg initial BW) w...
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Veröffentlicht in: | Journal of animal science 2023-11, Vol.101 (Supplement_3), p.294-295 |
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Zusammenfassung: | Abstract
This study aimed to evaluate the effects of increased concentrations of metabolizable protein and lysine from heat-treated soybean meal (TSBM) in forage-based growing cattle diets predicted to have positive metabolizable protein balance. Seventy Angus-based steers (298 ± 16 kg initial BW) were utilized in an 85-d randomized generalized block design with animal as the experimental unit. Dietary treatments were arranged to replace a proportion of the basal protein source, DDGS included at 16% dietary dry matter (DM), with TSBM at rates of 0% (TSBM0), 4% (TSBM4), 8% (TSBM8), and 12% (TSBM12) dietary DM. Steers were provided with ad libitum access to feed and water in a monoslope barn with dry-lot access. The basal diets contained (DM basis) 44% corn silage, 37% oat hay, and 3% supplement. Steers were blocked by BW into light, medium, and heavy blocks. Daily feed disappearance was measured using an automated feed system (Insentec Roughage Intake Control, Hokofarm B.V., Marknesse, The Netherlands), with disappearance assumed to be intake. Steers were individually weighed every 28 d to calculate average daily gain (ADG) throughout the experiment. Growth performance and feed intake were analyzed utilizing the MIXED procedure of SAS with fixed effects of body weight block and TSBM inclusion level. Treatments were evaluated when the F test was significant (P ≤ 0.05). There were no differences (P ≥ 0.16) for ending BW, ADG, dry matter intake (DMI), or gain:feed (G:F) among treatments (Table 1). Therefore, in growing diets predicted to be sufficient in metabolizable protein, replacing distillers grains with a source of metabolizable protein and amino acids provided by heat-treated soybean meal did not affect growth performance. |
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ISSN: | 0021-8812 1525-3163 |
DOI: | 10.1093/jas/skad281.351 |