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Ruminal biohydrogenation and abomasal flow of fatty acids in lactating cows: Oilseed provides ruminal protection for fatty acids
- Source :
- Scopus, Repositório Institucional da UNESP, Universidade Estadual Paulista (UNESP), instacron:UNESP
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Made available in DSpace on 2018-12-11T17:06:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-09-01 Fat sources, besides the energy-rich content, have featured beneficial effects on dairy cow production, reproduction and health. This work aimed to study the biohydrogenation process and fatty acid abomasal flow in lactating dairy cows fed different fat sources. Eight rumen and abomasum cannulated cows (188 ± 27.3 days in milk, 18.9 ± 3.24 kg of milk yield, and 572 ± 59.6 kg of body weight) were used in a 4 × 4 Latin square design. Control (CON) diet without fat source, soybean oil (SO), raw soybean grain (SG) and calcium salts of unsaturated fatty acids (CS) were evaluated. Fat sources decreased dry matter (DM), crude protein and neutral detergent fiber (NDF) intake and increased ether extract (EE) intake and ruminal pH (P < 0.05). Acetate to propionate ratio was lower in animals fed diets with fat (P < 0.05). Diets had no effect on microbial protein synthesis, and energy and nitrogen balances. NDF digestibility and DM passage rate were lower in animals fed diets with fat sources (P < 0.05), while protected sources (SG and CS) tended to increase ruminal fiber digestibility (P = 0.092) in relation to SO diet. Intake and abomasal flow of FA were higher (P < 0.05) for animals supplemented with fat sources than those fed CON. Protected sources (SG and CS) promoted greater abomasal flow of linoleic acid (C18:2) and lower biohydrogenation rate compared to the SO diet. Fat sources increased unsaturated milk fatty acids and serum cholesterol concentration while protected sources (SG and CS) increased milk C18:2 cis concentration (P < 0.05). Fat sources improved ruminal fermentation without compromise nutrients digestion and increasing fatty acids abomasal flow and milk concentration. Raw soybean grain had higher ruminal biohydrogenation protection than calcium salts. Department of Animal Nutrition and Production University of Sao Paulo, Pirassununga Department of Animal Science UNESP−Universidade Estadual Paulista “Júlio de Mesquita Filho”, Jaboticabal Department of Animal Science UNESP−Universidade Estadual Paulista “Júlio de Mesquita Filho”, Jaboticabal
- Subjects :
- 0301 basic medicine
Linoleic acid
food.ingredient
Conjugated linoleic acid
Abomasum
Soybean oil
03 medical and health sciences
chemistry.chemical_compound
food
Dry matter
Calcium salts
Food science
chemistry.chemical_classification
Ruminal digestibility
Passage rate
0402 animal and dairy science
food and beverages
Fatty acid
04 agricultural and veterinary sciences
Lipids
040201 dairy & animal science
Neutral Detergent Fiber
030104 developmental biology
chemistry
Animal Science and Zoology
Polyunsaturated fatty acid
Subjects
Details
- ISSN :
- 03778401
- Volume :
- 219
- Database :
- OpenAIRE
- Journal :
- Animal Feed Science and Technology
- Accession number :
- edsair.doi.dedup.....f8431d60ba738aea3dc1b4479774f893