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The Effects of Feeding Milled Rapeseed Seeds with Different Forage:Concentrate Ratios in Jersey Dairy Cows on Milk Production, Milk Fatty Acid Composition, and Milk Antioxidant Capacity

Life, ISSN: 2075-1729, Vol: 13, Issue: 1
2023
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Data on Life Sciences Detailed by Researchers at University of Oradea (The Effects of Feeding Milled Rapeseed Seeds with Different Forage:Concentrate Ratios in Jersey Dairy Cows on Milk Production, Milk Fatty Acid Composition, and Milk ...)

2023 FEB 03 (NewsRx) -- By a News Reporter-Staff News Editor at NewsRx Life Science Daily -- New study results on life sciences have been

Article Description

We aimed to evaluate the effects of milled rapeseed (MR) supplementation of low- or high-concentrate diets on milk production and composition, fatty acids (FAs) profile, and antioxidant capacity. Sixteen Jersey dairy cows were used in a 4 × 4 Latin square design, for four periods of 4 weeks, and assigned to four treatments as a 2 × 2 factorial design. Dietary treatments consisted of iso-nitrogenated total mixed rations with high (65:35; LC—low concentrate) or low (50:50; HC—high concentrate) forage:concentrate (FC) ratios, supplemented with MR to provide 30 g oil/kg dry matter (DM) (LR and HR), or without MR supplement (L and H). Increasing the proportion of concentrates led to an increase in DM intake (DMI), net energy (NE) intake, and milk production, but milk fat and protein content decreased. Supplementing diets with MR led to an increase in NE intake and milk production, but did not affect DMI and milk composition. Diets supplemented with MR caused a decrease in the concentration of FAs with atherogenic effect and the increase in the level of FAs beneficial for human health (C18:1 cis-9, C18:1 trans-11, and C18:3 n-3), while the decrease in the FC ratio had a negative effect on omega-3 FAs. An improvement in the antioxidant capacity of milk was observed with diets with the high FC ratio but also by supplementing the feed with MR. These results could contribute to the development of effective strategies to improve the nutritional quality of milk without affecting the productive performance of cows.

Bibliographic Details

Mierlita, Daniel; Santa, Anita; Mierlita, Stefania; Daraban, Stelian Vasile; Suteu, Mihai; Pop, Ioan Mircea; Mintas, Olimpia Smaranda; Macri, Adrian Maximilian

MDPI AG

Agricultural and Biological Sciences; Biochemistry, Genetics and Molecular Biology; Earth and Planetary Sciences

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