Ruminal biohydrogenation and abomasal flow of fatty acids in lactating cows fed diets supplemented with soybean oil, whole soybeans, or calcium salts of fatty acids

Journal of Dairy Science
J E FreitasFrancisco P Rennó

Abstract

Ruminants have a unique metabolism and digestion of unsaturated fatty acids (UFA). Unlike monogastric animals, the fatty acid (FA) profile ingested by ruminants is not the same as that reaching the small intestine. The objective of this study was to evaluate whole raw soybeans (WS) in diets as a replacer for calcium salts of fatty acids (CSFA) in terms of UFA profile in the abomasal digesta of early- to mid-lactation cows. Eight Holstein cows (80 ± 20 d in milk, 22.9 ± 0.69 kg/d of milk yield, and 580 ± 20 kg of body weight; mean ± standard deviation) with ruminal and abomasal cannulas were used in a 4 × 4 Latin square experiment with 22-d periods. The experiment evaluated different fat sources rich in linoleic acid on ruminal kinetics, ruminal fermentation, FA abomasal flow, and milk FA profile of cows assigned to treatment sequences containing a control (CON), with no fat source; soybean oil, added at 2.68% of diet dry matter (DM); WS, addition of WS at 14.3% of diet DM; and CSFA, addition of CSFA at 2.68% of diet DM. Dietary fat supplementation had no effect on nutrient intake and digestibility, with the exception of ether extract. Cows fed fat sources tended to have lower milk fat concentration than those fed CON. In genera...Continue Reading

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Citations

Sep 2, 2020·Animal Science Journal = Nihon Chikusan Gakkaihō·Lais S B DiasJosé Esler de Freitas Júnior
Nov 24, 2020·PloS One·Tamires da Silva MagalhãesGleidson Giordano Pinto de Carvalho
Feb 3, 2021·Animals : an Open Access Journal From MDPI·Henry D R AlbaGleidson G P de Carvalho
Mar 10, 2021·Tropical Animal Health and Production·Lara Maria Santos BrantJosé Esler de Freitas Júnior
Mar 21, 2021·Tropical Animal Health and Production·Lucas Fialho de Aragão BulcãoJosé Esler de Freitas Júnior

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