Assessment of the amino and fatty acid composition and biological value of meat of broiler chickens taken by “Subtiform” probiotic bio preparation

Abstract

Probiotics are widely used for intensive technologies of growing broiler chickens due to their ecologically harmless properties, increasing productivity and obtaining safe and high-quality meat products. The purpose of the study was to determine the effect of the probiotic biopreparation Subtiform on the amino and fatty acid composition and biological value of chicken meat after drinking the probiotic biopreparation Subtiform in different doses. Broiler chickens from 28 to 42 days of age were given the probiotic bio preparation Subtiform, which contains Bacillus subtilis and Bacillus licheniformis at 2.5 × 109 CFU/g and dry milk serum per 20 birds in a cage: control - birds were not given probiotics with water; experiment 1 – 0.5 g/10 dm3 of water; experiment 2 – 2.0 g/10 dm3 of water; experiment 3 – 4.0 g/10 dm3 of water. The total content of amino acids in the breast meat of broiler chickens slightly increased in experiment 1 – by 1.71 % (Р < 0.01), in experiment 2 – by 3.57 % (Р ≤ 0.001), in experiment 3 – by 12.35 % (Р ≤ 0.001). The content of essential amino acids in breast meat was increased – 5.39 ± 0.04 mg/100 mg (Р ≤ 0.001) due to an increase in the content of methionine – 1.7 times (Р ≤ 0.01), leucine – by 1.3 times (Р ≤ 0.001), lysine and isoleucine – 1.2 times compared to the control group; the content of substituted amino acids also increased – 9.07 ± 0.04 mg/100 mg (Р ≤ 0.001) due to an increase in the content of aspartic acid – 1.2 times (Р ≤ 0.01), glutamic acid – 1.13 times (Р ≤ 0.01), as well as a decrease in glycine content – by 1.2 times (Р≤0.01) compared to the control group. The protein-quality index in experiment 3 was higher due to the increased content of tryptophan – 0.37 ± 0.025 mg/100 mg of meat (Р ≤ 0.001) and oxyproline – 0.06 ± 0.002 mg/100 mg of meat (Р ≤ 0.001). A positive effect of the probiotic biological preparation of Bacillus subtilis and Bacillus licheniformis on the fatty acid composition of the meat of broiler chickens of the research groups was established. The highest total content of saturated fatty acids to the total content of fatty acids in percentage was in experimental group 3 – 38.39 ± 0.002 %, which accordingly increased by 8.11 % compared to the control group (35.51 ± 0.002 %), due to the increase due to the increase in palmitic, stearic, iso-stearic content. The content of monounsaturated acids was characterized by the content of myrostolenic, palmitoleic, heptadeceneic, oleic, gondoic, and erucic nervonic acids. The highest content of monounsaturated fatty acids in experimental group 3 is 43.77 ± 0.002 % (Р≤0.001) due to an increase in the content of 43.77 ± 0.002 % (Р ≤ 0.001) of palmitoleic, oleic and gondoic acids. The increase in the content of polyunsaturated fatty acids in the meat of broiler chickens in experimental sample 3 was the highest – 25.16 ± 0.02 % (Р ≤ 0.001) due to the increase in the content (Р ≤ 0.001) of linoleic, linolenic and arachidonic fatty acids. The highest total content of omega-3 was in experimental groups of broiler chicken meat 2 and 3, respectively – 1.03 ± 0.001 % (Р ≤ 0.001) and 1.30 ± 0.001 % (Р ≤ 0.001) and omega-6, respectively – 22.98 ± 0.014 % (Р ≤ 0.001) and 23.40 ± 0.015 % (Р ≤ 0.001). The ratio ∑Omega-6/∑Omega-3 was – 22.31 and 18.00 in experimental groups 2 and 3, respectively. An increase in the relative biological value of meat (103.85 %) was observed when using Tetrachimena piriformis in a dose of the probiotic biopreparation Subtiform – 4.0 g/10 dm3 of water. The practical value of the research lies in the use of the probiotic biopreparation Subtiform to increase the biological value of meat and improve the amino acid and fatty acid profile.