Assessment of the effect of growth regulating hormones on body weight broiler chickens South Ural State Agrarian University
https://doi.org/10.31043/2410-2733-2025-2-55-60
Abstract
Purpose. To determine the effect of hormones circulating in the blood (somatotropin, thyroxine, triiodothyronine) on the body's ability of broiler chickens to increase body weight.
Materials and methods. In broiler chickens of the Smena 9 cross, raised in industrial conditions in a standard technological environment, the level of hormones circulating in the blood was determined: growth hormone, free triiodothyronine and thyroxine by ELISA at 14, 21 and 35 days of age, as well as body weight by individual weighing. To assess the statistical relationship between hormone concentration and body weight, the Pearson correlation coefficient was determined using the Exel software package.
Results. The concentration of growth hormone, free triiodothyronine, and free thyroxine during the rearing period of broiler chickens varies between 2,26±0,04—2,58±0,04 mIu/l; 7,01±0,02—11,10±0,03 pmol/l (p<0,05) and 12,92±0,08—14,18±0,07 pmol/L. Differentiation of individuals in the sample by body weight at 14, 21, and 35 days of age corresponds to a normal Gaussian distribution; with an average body weight of 531,0; 1025,0 and 2170,5 g, the proportion of broiler chickens with an approximate weight value in the sample is 85,00, 82,00, and 87,00 %. When assessing the correlations between the signs, it was found that in a pair of free thyroxine – body weight, the relationship is weak; in pairs of growth hormone – body weight and free T3 – body weight are r=0,44—0,48 and r=0,53—0.61.
About the Authors
M. Veretennikova
South Ural State Agrarian University
Russian Federation
Russian Federation
Veretennikova Maria Alexandrovna – postgraduate student
Troitsk, Gagarin str., 13, 457100, Chelyabinsk Region
M. Derkho
South Ural State Agrarian University
Russian Federation
Russian Federation
Derkho Marina Arkadyevna – Dr Habil (Biol. Sc.), Professor
Troitsk, Gagarin str., 13, 457100, Chelyabinsk Region
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Review
For citations:
Veretennikova M., Derkho M. Assessment of the effect of growth regulating hormones on body weight broiler chickens South Ural State Agrarian University. Genetics and breeding of animals. 2025;(2):55-60. (In Russ.) https://doi.org/10.31043/2410-2733-2025-2-55-60
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