Effect of incremental amounts of camelina oil on milk fatty acid composition in lactating cows fed diets based on a mixture of grass and red clover silage and concentrates containing camelina expeller
| Autor: | Ilkka Simpura, Aila Vanhatalo, Anni Halmemies-Beauchet-Filleau, Vesa Toivonen, Tuomo Kokkonen, Kevin J. Shingfield, Seija Jaakkola |
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| Přispěvatelé: | Department of Agricultural Sciences, Tuomo Kokkonen / Principal Investigator, Seija Jaakkola / Principal Investigator, Animal Science Research |
| Rok vydání: | 2016 |
| Předmět: |
NITROGEN-METABOLISM
0301 basic medicine Conjugated linoleic acid RUMEN FERMENTATION chemistry.chemical_compound Linseed oil trans fatty acid AMINO-ACIDS Lactose 412 Animal science dairy science DAIRY-COWS 2. Zero hunger Silage saturated fatty acid Fatty Acids food and beverages CONJUGATED LINOLEIC-ACID 04 agricultural and veterinary sciences camelina RUMINAL LIPID-METABOLISM Milk Saturated fatty acid Female SUNFLOWER-SEED OIL food.ingredient LINSEED OIL MAMMARY LIPOGENESIS Biology Poaceae conjugated linoleic acid PLANT OILS 4111 Agronomy 03 medical and health sciences Animal science food Botany Genetics Animals Lactation Dry matter Animal fat 0402 animal and dairy science biology.organism_classification 040201 dairy & animal science Camelina Diet 030104 developmental biology chemistry Animal Science and Zoology Cattle Trifolium Food Science |
| Zdroj: | Journal of dairy science. 100(1) |
| ISSN: | 1525-3198 |
| Popis: | Camelina is an ancient oilseed crop that produces an oil rich in cis-9,cis-12 18:2 (linoleic acid, LA) and cis-9,cis-12,cis-15 18:3 (α-linolenic acid, ALA); however, reports on the use of camelina oil (CO) for ruminants are limited. The present study investigated the effects of incremental CO supplementation on animal performance, milk fatty acid (FA) composition, and milk sensory quality. Eight Finnish Ayrshire cows (91d in milk) were used in replicated 4×4 Latin squares with 21-d periods. Treatments comprised 4 concentrates (12kg/d on an air-dry basis) based on cereals and camelina expeller containing 0 (control), 2, 4, or 6% CO on an air-dry basis. Cows were offered a mixture of grass and red clover silage (RCS; 1:1 on a dry matter basis) ad libitum. Incremental CO supplementation linearly decreased silage and total dry matter intake, and linearly increased LA, ALA, and total FA intake. Treatments had no effect on whole-tract apparent organic matter or fiber digestibility and did not have a major influence on rumen fermentation. Supplements of CO quadratically decreased daily milk and lactose yields and linearly decreased milk protein yield and milk taste panel score from 4.2 to 3.6 [on a scale of 1 (poor) to 5 (excellent)], without altering milk fat yield. Inclusion of CO linearly decreased the proportions of saturated FA synthesized de novo (4:0 to 16:0), without altering milk fat 18:0, cis-9 18:1, LA, and ALA concentrations. Milk fat 18:0 was low ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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