The article analyses the issues of balanced feeding of broiler chickens and their balanced diet. The results of studies aimed to determine the effect of mixed feeds on the productivity of Arbor Acres cross broiler chickens and the economic efficiency of poultry meat production companies are presented. It was found that broilers from the experimental group, who were fed with improved compound feed with additional sources of proteins and carbohydrates and feed additives exceeded broilers from the control group by their live weight at all ages. At the slaughter age, the average weight was more than 39.2%. The experimental group consumed 10-15% less feed whose conversion was 2.4 and 1.9 kg in favour of the group feeding with the new compound feed. The new compound feed had a positive effect on the viability of broilers: there were no deaths during the period under study. According to the control slaughter results, it was found that the pre-slaughter live weight was higher by 35% in the experimental group. The weight of edible parts increased by 6%. The improved compound feed can be used both in industrial conditions and by poultry farms.

The main objective of stock breeding is to raise highly productive animals, improve existing ones and create new types and breeds of livestock. The main focus of dairy cattle breeding is on increasing milk yield, fat and protein content in milk; preserving fertility and productive longevity; and developing high adaptive properties of suitability for modern industrial technologies. Selection and breeding of black-and-white and red steppe breeds of cattle is aimed at improving the breeding and productive qualities of the animals. These breeds are traditionally raised in Western Siberia. Breeding to improve the economic and productive features of black-and-white and red steppe breeds of cattle led to the creation of new zonal types, including the Priobsky, Kulunda and Siberian zonal types, which are characterized by relatively high dairy productivity. This study showed that the Siberian type of heifers had the maximum milk yield – 6389 kg, which was 1239 kg and 828 kg more than the Kulunda and Priobsky types, respectively. The same tendency was observed for the third lactation. Animals with a dry period of less than 40 days had lower milk yields than those with a longer period. In terms of the amount of milk and the weight fraction of fat and protein in the milk, the animals exceeded the standard for the parental breed. The duration of pregnancy among the studied animals was within the physiological norm – 276.1-280.8 days. The research results may be of interest to agricultural students and specialists involved in selection issues. Keywords: reproduction, breed, milk productivity

Proper nutrition is not only a biological but also a social, economic, and political issue. Insufficient intake of essential elements may result in the occurrence of hidden hunger and metabolic disorders. Some regions of the world are characterized by a lack of certain nutrients in the environment which leads to their lack in plant and animal products. The most common problem is a deficiency of iodine and selenium. To solve this problem, the government takes various measures, such as direct inclusion of necessary additives in food products, as well as the modernization of technological process of crop and livestock production. In this chapter, the authors analyze the provision of the population in various countries and regions with limiting nutrients. The study specifically aims at exploring the issues of production and trade in fortified (modified) food products that can directly fill in the lack of essential elements in particular territories.

Proper nutrition is not only a biological but also a social, economic, and political issue. Insufficient intake of essential elements may result in the occurrence of hidden hunger and metabolic disorders. Some regions of the world are characterized by a lack of certain nutrients in the environment which leads to their lack in plant and animal products. The most common problem is a deficiency of iodine and selenium. To solve this problem, the government takes various measures, such as direct inclusion of necessary additives in food products, as well as the modernization of technological process of crop and livestock production. In this chapter, the authors analyze the provision of the population in various countries and regions with limiting nutrients. The study specifically aims at exploring the issues of production and trade in fortified (modified) food products that can directly fill in the lack of essential elements in particular territories.

This article is about the issue of increasing the egg production of Dekalb White hens through induced molting. For this study, hens at 60 weeks of age were divided into two groups (control and test groups), 53,760 animals in each one. The study continued until birds reached 94 weeks of age. During this study, induced molting for test group was performed in two stages. The first stage included seven days of fasting, watering ad libitum, dimmable lighting in the house for 3 hours. The second stage included the gradual giving of mixed feed starting with a daily intake of 40 g/bird, with an increase of 20 g weekly up to 115 g/bird; lighting period was increased weekly by 3 hours until the established standards were reached. After the end of fasting period, a probiotic preparation based on Bacillus subtilis culture in the amount of 0.2% was added to mixed feed for the test group. It was shown that this scheme allows increasing livability by 2.1%, the number of laid eggsby 1.2%, reducing feed consumption to 8.1% and getting additional economic profit.