Effects of cysteamine compound on milk production
and hormonal responses of lactating cow during
heat stress

In heat-stressed cow received cysteamine compound (Lactonin) the rectal temperature decreased (P<0.05), milk yield, fat-corrected milk, milk fat and feed conversion rate (FCR) increased (P<0.05). These changes were companied with trendy (0.05 < P < 0.15) of higher milk protein and lower somatic cell count. Additionally, plasma insulin enhanced (P<0.01) signifi cantly in Lactonin herd (n=49), whereas T₃ and T₄ tended (0.05 < P < 0.15) to decline. The data show that Lactonin helps heat-stressed cow to maintain a more normal metabolism in hot summer, this positive effect of Lactonin on cow performance was associated with Lactonin-dependent alteration of plasma insulin, T₃ and T₄.

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1230-1388

Assigning DOI numbers, introducing articles from supplements and recent publications to POL-index database, maintaining anti-plagiarism detection, electronic system to proceed manuscripts and webpage of the Journal with interactive pdf files, and language correction of manuscripts published in Journal of Animal and Feed Sciences are financed in the years 2018–2019 by the Ministry of Science and Higher Education from the funds for science popularization activities, Agreement No. 631/P-DUN/2018.