Effects of partial replacement of solvent-extracted soybean meal by amino resin-treated soybean meal in the concentrate supplement of high producing grazing dairy cows

Effects of partial replacement of solvent-extracted soybean meal by amino resin-treated soybean meal in the concentrate supplement of high producing grazing dairy cows

•Total DMI and pasture intake were not affected by replacing conventional by treated SBM.•The replacement of treated SBM tended to increase both milk and lactose production.•No differences were observed in the balance of nitrogen and use of dietary N. We aimed to determine the effects of partially r...

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Bibliographic Details
Published in:Livestock science Vol. 254; p. 104762
Main Authors: Malacco, Victor M.R., Martins, Leoni F., Maciel, Isabella C.F., Lage, Camila F.A., Coelho, Raquel R.B., Costa, Anna Luiza B.S.A., Moura, André M., Saturnino, Helton M., Coelho, Sandra G., Reis, Ronaldo B.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-12-2021
Subjects:
Nitrogen metabolism
Pasture
Ruminal undegradable protein
Tropical conditions
Tropical conditions
Nitrogen metabolism
Pasture
Ruminal undegradable protein
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Summary:•Total DMI and pasture intake were not affected by replacing conventional by treated SBM.•The replacement of treated SBM tended to increase both milk and lactose production.•No differences were observed in the balance of nitrogen and use of dietary N. We aimed to determine the effects of partially replacing conventional solvent-extracted soybean meal by amino resin-treated soybean meal in the concentrate supplement of lactating dairy cows grazing Guinea grass (Panicum maximum cv. Mombaça) on dry matter intake, milk production and composition, feed and nitrogen use efficiency, and nutrient digestibility. Eighteen Holstein x Gyr crossbred multiparous cows (79 ± 38 days in milk and 37.4 ± 4.69 kg/d of milk yield) were used in a replicated 3 × 3 Latin square design study with three experimental periods of 21 d The solvent extract soybean meal of the control diet (CON) was replaced by 1.0 (TSBM1.0) and 1.5 (TSBM1.5) kg as-fed basis of amino resin-treated soybean meal (29 and 43% as dry-matter basis, respectively) in the treatment diets. Dry matter intake, milk casein, protein, and fat contents, feed efficiency, nitrogen use efficiency, and nutrient digestibility did not differ among treatments (P > 0.05). The metabolizable protein was not increased by the treatments; however, cows fed with TSBM1.5 tended to produce 1.2 kg/d more milk (P = 0.09) and 64.3 g/d more lactose (P = 0.06) than CON cows. Although the supply of metabolizable protein was not affected by treatments, increasing rumen undegradable protein supply by 43% by replacing conventional solvent-extracted soybean meal with amino resin-treated soybean meal tended to increase milk production of high producing grazing cows.
ISSN:1871-1413
1878-0490
DOI:10.1016/j.livsci.2021.104762