Effects of n-3 fatty acids on growth, antioxidant status, and immunity of preweaned dairy calves
Kinga Śpitalniak-Bajerska , Antoni Szumny , Krystyna Pogoda-Sewerniak , Robert Kupczyński
AbstractThis study aimed to estimate the influences of flax oil and a mixture of ethyl esters of fatty acids from flax oil added to a milk replacer (MR) formulation on the biochemical, immunological, and antioxidant status of blood, production parameters, and health of calves. Twenty-seven Holstein-Frisian calves were assigned to 3 groups: the control group without fat added to the diet (CON, n = 9), a group receiving ethyl esters of flax oil (10 g/d) with lyophilized apples (25 g; MRE), or a group receiving flax oil (10 g/d) with lyophilized apples (25 g; MRL). The study was conducted from d 14 to d 42 of life. Intake of MR and feed were recorded daily, and fecal scores, rectal temperature, and body weight were recorded weekly. Laboratory blood tests were conducted every 7 d from d 14 to 42. Supplementation with the formulation containing ethyl esters of flax oil (MRE) positively affected health, average daily weight gain, growth rate, and feed efficiency. Intake of the starter feed was lower in the calves receiving the formulation with flax oil (MRL). The MRE formulations lowered the concentrations of triglycerides, total cholesterol, and LDL fraction in blood serum and decreased the total antioxidant capacity (TAS) and levels of glutathione peroxidase (GPx). The MRL formulation increased TAS and GPx levels in blood serum. The MRE treatment limited the circulating levels of tumor necrosis factor. The MRE and MRL preparations lowered the concentration of SFA (C16:0, C18:0, C18:1) in blood serum, and MRE significantly increased levels of α-linolenic acid. The MRE and MRL preparations beneficially affected production and physiological parameters. Our data support the idea that supplementation with n-3 fatty acids improves calf growth and metabolic and oxidative functions in young calves.
|Journal series||Journal of Dairy Science, ISSN 0022-0302, e-ISSN 1525-3198, (N/A 200 pkt)|
|Publication size in sheets||0.6|
|Keywords in English||calf; fatty acid; flax oil; growth; immunity|
|ASJC Classification||; ;|
|Internal identifier||PX-5e4e4804d5de49259f1a5018; PX-5e4e4a02d5de49259f1a5023|
|Score||= 200.0, 15-09-2020, ArticleFromJournal|
|Publication indicators||= 0; = 1; : 2018 = 1.557; : 2018 = 3.082 (2) - 2018=3.208 (5)|
|Citation count*||1 (2020-09-15)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.