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Production effects of feeding extruded soybean meal to early-lactation dairy cows.
Harper, M T; Oh, J; Melgar, A; Nedelkov, K; Räisänen, S; Chen, X; Martins, C M M R; Young, M; Ott, T L; Kniffen, D M; Fabin, R A; Hristov, A N.
Afiliación
  • Harper MT; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Oh J; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Melgar A; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Nedelkov K; Department of Animal Science, The Pennsylvania State University, University Park 16802; Department of Animal Husbandry, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria.
  • Räisänen S; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Chen X; Department of Animal Science, The Pennsylvania State University, University Park 16802; College of Pastoral Agriculture Science and Technology, Lanzhou University, 730020 Lanzhou, Gansu, China.
  • Martins CMMR; Department of Animal Science, The Pennsylvania State University, University Park 16802; School of Veterinary Medicine and Animal Science, University of Sao Paulo, 13635-900 Pirassununga, Brazil.
  • Young M; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Ott TL; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Kniffen DM; Department of Animal Science, The Pennsylvania State University, University Park 16802.
  • Fabin RA; Fabin Bros. Farms, Indiana, PA 15701.
  • Hristov AN; Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address: anh13@psu.edu.
J Dairy Sci ; 102(10): 8999-9016, 2019 Oct.
Article en En | MEDLINE | ID: mdl-31421886
The objective of this experiment was to evaluate productive and reproductive effects of replacing solvent-extracted soybean meal (SSBM) with extruded soybean meal (ESBM) in a total mixed ration for early-lactation dairy cows. Thirty-four Holstein cows (12 primiparous and 22 multiparous) were used in a randomized complete block design experiment with 17 cows per treatment. Feeding was ad libitum for 5 to 10% refusals. A fresh-cow diet was fed the first 21 d in milk followed by a lactation diet from 22 to 60 d in milk. Milk and dry matter intake data were collected throughout the experiment, and samples were collected for blood chemistry and amino acid profile, nutrient digestibility, nitrogen utilization, and enteric methane emission using the GreenFeed system (C-Lock Inc., Rapid City, SD). Dry matter intake, milk yield, and feed efficiency were not different between SSBM and ESBM. Energy-corrected milk yield and efficiency were also not different between diets. Diet had no effect on milk composition, except that milk true protein yield was decreased by ESBM. Enteric methane emission, yield, and intensity were not different between SSBM and ESBM. Because of its greater fat content, ESBM triggered expected changes in milk fatty acid (FA) profile: decreased sum of C16, saturated, and odd- and branched-chain FA and increased sum of preformed FA, polyunsaturated, and trans FA. The ESBM diet increased or tended to increase some essential amino acids in plasma. In this study, ESBM did not affect dry matter intake and did not improve lactational performance or onset of ovarian function in early-lactation dairy cows, and it decreased milk protein yield, possibly due to greater unsaturated FA intake compared with SSBM.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reproducción / Glycine max / Bovinos / Leche / Ácidos Grasos / Proteínas de la Leche Límite: Animals Idioma: En Revista: J Dairy Sci Año: 2019 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reproducción / Glycine max / Bovinos / Leche / Ácidos Grasos / Proteínas de la Leche Límite: Animals Idioma: En Revista: J Dairy Sci Año: 2019 Tipo del documento: Article Pais de publicación: Estados Unidos