Abstract
Thirty-six grazing dairy cows were used to determine the effect of combinations of soybean (SO), and linseed (LO) oils on milk production, composition and milk fatty acid (FA) profile. Treatments were a basal control diet (56% pasture, 44% concentrate) or the control diet supplemented with oils at 4% of estimated total dry matter (DM) intake. Oils were manually mixed to the concentrate in pure forms (SO100 or LO100) or in blends (%w/w) at SO75 - LO25, SO50 - LO50 and SO25 - LO75. Concentrate and oils were thoroughly consumed. Pasture intake (kg DM/cow·day) was 9.27 in control and decreased (p p p trans-9 C18:1 and trans-10 C18:1 FA.
Highlights
Dairy products provide about 25% - 30% of total saturated fat in the human diet and some saturated fatty acid (FA) like lauric (C12:0), myristic (C14:0) and palmitic (C16:0) may have a potential negative effect on human health if consumed in excess [1]
The results suggest some advantage for the SO75:LO25 blend considering the relative costs of both oils, the positive effects on milk, fat and protein yields, the lower hypercholesterolemic FA content of milk and the increase in VA and RA content while maintaining a healthy n − 6/n − 3 ratio and very low levels of the detrimental trans-9 C18:1 and trans-10 C18:1 FA
The RA and VA content of milk from ruminant animals can be increased by dietary factors as pasture intake and feeding polyunsaturated FA (PUFA) contained in vegetable oils like linoleic acid in soybean oil (SO) and linolenic acid in linseed oil (LO) [3] [4] [5]
Summary
Dairy products provide about 25% - 30% of total saturated fat in the human diet and some saturated FA like lauric (C12:0), myristic (C14:0) and palmitic (C16:0) may have a potential negative effect on human health if consumed in excess [1]. The RA and VA content of milk from ruminant animals can be increased by dietary factors as pasture intake and feeding polyunsaturated FA (PUFA) contained in vegetable oils like linoleic acid in soybean oil (SO) and linolenic (cis-9, cis-12, cis-15, C18:3) acid in linseed oil (LO) [3] [4] [5]. This practice is effective to reduce the saturated FA content in milk fat [6] [7]. The objective of the experiment was to quantify the effectiveness of the combination of SO and LO on productive performance and milk FA profile in order to obtain a functional bovine milk
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
