Background and Aim: Monitoring food quality and safety remain a pressing issue. The intermediate results of the study on the residual amounts of heavy and toxic elements in food products are presented herein. The aim of this study was the determination of heavy metals in milk and fermented milk products from basic farms in the Almaty region, Kazakhstan. Materials and Methods: A total of 120 raw milk samples and 80 cottage cheese samples were analyzed. The milk and cottage cheese samples were subjected to mineralization during the analysis to remove organic impurities and determine the heavy metal concentrations using atomic absorption spectrometry. Results: The contents of cadmium, lead, and arsenic in all raw materials and food products did not exceed the maximum permissible concentrations. Conclusion: The dairy samples showed low contents of cadmium, mercury, lead, and arsenic that did not exceed the allowable concentrations for basic farms in the Almaty region.

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This study presents the results of monitoring heavy metals (Cd, Pb, As and Hg) in the water -soil -fodder -milk food chain. The research aimed to study the effect of lead, cadmium, mercury and arsenic in soil, water and components of the diet of cattle on their bioaccumulation in livestock products (milk) in basic farms of the Republic of Kazakhstan. The possibility of obtaining ecologically safe livestock products in meat and dairy cattle breeding has also been scientifically substantiated. A total of 120 soil samples, 60 water samples, 212 fodder samples and 60 milk samples were analyzed. Samples for the research were taken in spring, summer and fall in 2018 and 2019. Analysis of samples for the content of heavy metals was performed in the laboratory of the Kazakh-Japan Innovation Center at the Kazakh National Agrarian University. Determination of residual amounts of heavy metals (cadmium, lead, arsenic and mercury) was carried out on a novAA350 atomic absorption spectrometer (Analytik Jena, Germany) with a TaLab voltammetric analyzer. The obtained data allow concluding the degree of environmental pollution (water bodies, soil, agricultural fodder) and, consequently, the environmental safety of milk. Considering the data obtained, the authors have found that in the studied administrative districts of the Almaty region, the calculated transition coefficients in the water-soilfodder-milk system indicated that the largest transition of heavy metals was for lead and less migration was observed for mercury and arsenic. Fodders and feed additives preserved the tendency to accumulate trace elements. The analysis of heavy metals content in the study objects has shown that their distribution occurred in decreasing order: Lead > zinc > mercury > arsenic.

This article presents data of the effect of new feed additives on the fatty acid composition meat of Nile Tilapia. Test subjects were divided into four groups (different ages), experimental fish were contained in special reservoirs. The following feed types were used in the research: No. 1 (for fish bred in ponds), No. 2 (for young fish), No. 3 (for a commercial group of fish), No. 4 (for fish bred in pools). Experimental studies were conducted near the Chundzha natural hot spring in the Almaty region. Gas chromatography was used to determine the amount of fatty acids in fish meat. The use of new feeds has led to an increase the content of Fattyacids (FA ) and monounsaturated fatty acids (MUFA) and polyunsaturated fattyacids (PUFA) in particular.

Background and Aim: Dairy cattle breeding plays a significant role in providing the population with high-quality, reasonably priced goods. The development of this industry and its effectiveness depends on the proper use of available feed products. Feed additives (FAs), as a rule, should compensate for missing elements in the diet. This study aimed to determine the effect of the FA Vermikom on blood parameters, as well as milk physicochemical and mineral composition and yield in lactating dairy cows. Materials and Methods: A total of 30 Holstein cows, with an average weight of 650±5 kg, were randomly divided into three groups of 10. Over a period of 5 months, each group was fed one of three diets: Mixed main diet without supplements (control), main diet supplemented with 2% Vermikom, and main diet supplemented with 4% Vermikom. Results: Hematological parameters, productivity, and physicochemical and mineral composition of milk from animals provided the FA Vermikom were higher than those of the control group. In the Vermikom groups, the hemoglobin content was higher by 5.75%, calcium by an average of 10.8%, and total protein by 2.5%. The average daily milk yield was also higher by 8.4% than the control group. Regarding the mineral composition of the milk, the content of calcium, phosphorus, and iron exceeded that of the control on average by 2.9%, 3.4%, and 14.8%, respectively. Conclusion: We propose introducing 4% Vermikom into the diet of dairy cows based on the study results. Future research will expand our knowledge regarding cows' needs for all recommended nutrients, thereby improving animal productivity and milk quality. The results obtained contribute to further expanding the food base of animal husbandry in the Republic of Kazakhstan.