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Effect of pre‐ and post‐partum supplementation with lipid‐encapsulated conjugated linoleic acid on milk yield and metabolic status in multiparous high‐producing dairy cows
Author(s) -
Galamb E.,
Faigl V.,
Keresztes M.,
Csillik Z.,
Tröscher A.,
Elek P.,
Kulcsár M.,
Huszenicza G.,
Fébel H.,
Husvéth F.
Publication year - 2017
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/jpn.12544
Subject(s) - conjugated linoleic acid , ice calving , lactation , ketosis , zoology , linoleic acid , fatty acid , chemistry , medicine , endocrinology , biology , pregnancy , biochemistry , diabetes mellitus , genetics
Summary We evaluated the lactation performance, liver lipid content and plasma metabolites indicating the energy balance of dairy cows supplemented with conjugated linoleic acid ( CLA ) pre‐ and post‐partum ( PP ) vs. only PP . A total of 60 cows were divided into three groups ( n = 20). Daily diet of cows was supplemented with 14 g of CLA (7 g cis‐9, trans‐11 and 7 g trans‐10, cis‐12 isomers) from week 3 before the expected date of calving (group CLA 1), or from the day of calving (group CLA 2) until 77–91 days PP . Control cows were fed an isocaloric, isonitrogenous and isolipidic diet without CLA . Between week 3 and week 6 PP , the milk yield of cows in both CLA ‐treated groups was approximately 4.5 kg higher (p < 0.05) than in control. Milk fat concentrations decreased from week 3 and were lower in both CLA groups than in control (p < 0.01). Body condition score loss was lower (p < 0.05) in the CLA 1 than in the control group on week 5 PP . By week 11 PP , the body condition of both CLA 1 and CLA 2 groups exceeded that of control. Plasma non‐esterified fatty acid was lower in CLA 1 compared to CLA 2 and control during the early PP period (p < 0.05), while this difference faded away by the late PP period. Beta‐hydroxybutyrate ( BHBA ) increased rapidly in all groups following calving. In CLA 1 group, it began to decrease sooner than in CLA 2 and control. The prevalence of subclinical ketosis ( BHBA > 1.2 m m ) was lower in CLA 1 group than in CLA 2 and control (p < 0.05). Liver biopsy analyses showed that CLA 1 treatment decreased (p < 0.05) the total lipid content of liver compared to control at week 5 after calving. Our results show that CLA supplementation is more efficient in alleviating body mass mobilization and decreasing the incidence of subclinical ketosis when applied as early as 3 weeks before calving than started feeding after calving.