The paper discusses the effect of a newly developed complex feed additive Grainbiosorb used in complete feed on livability, age of first egg laying, egg productivity, and feed consumption for the production of 1 dozen eggs of laying quails of the Texas white broiler breed. The scientific experiment was carried out in the experimental vivarium of Krasnodar Research Centre for Animal Husbandry and Veterinary Medicine according to the standard technique recommended by the Federal Scientific Center “All-Russian Research and Technological Institute of Poultry” of Russian Academy of Sciences, (Sergiev Posad, 2013). The developed complex feed additive Grainbiosorb consists of fermented brewer’s spent grain, a mineral sorbing complex and probiotic microorganisms. Brewer’s spent grain is pre-fermented with probiotic bacterial concentrate, consisting of lactic acid, and propionic acid microorganisms. The use of fermented brewer’s spent grain in combination with a mineral complex can solve the problems of metabolism, digestion, exposure to heavy metals and thereby increase productivity and contribute to obtaining safe poultry products. The livability of the quail population in experimental and control groups was the same and amounted to 90.0%. The quails of the first group laid the first egg at the age of 44 days, while the quails of the second group at the age of 42 days. Gross egg production for the period of the experiment per the initial laying quail and the egg production for the average laying quail increased in the experimental group relative to the control by 3.8%. The intensity of egg production in the experimental group increased by 2.3 abs. % relative to that in the control group. Feed consumption for the production of 1 dozen quail eggs decreased by 5.5% in the experimental group, relative to the control.

This study examined the effect of feed additives based on brown coal on the productivity indicators of laying hens. The Relict A® organo-mineral feed additive for livestock and poultry is a multi-component, gummatized product with a wide range of biological activity, accelerating the growth and development of the animal. Relict A® is an environmentally friendly supplement that does not contain hormones or synthetic compounds. The control group was fed complete feed without additives. The second, third and fourth groups were fed feed containing 0.04%, 0.06% and 0.10% of the studied additives, respectively. The amount of feed for each group of laying hens was strictly normalized in accordance with their age, according to the recommendations for this cross. The use of the Relict A® feed additive in the laying hens’ rations led to an increase in the average number of eggs per laying hen, a decrease in the cost of feed for producing 1 dozen eggs, and a reduction in the time when the poultry reached the peak egg laying intensity. Feeding the additive to laying hens reduced the cost of producing 1 dozen eggs in the experimental groups, and also increased the profitability of chicken eggs in comparison with the control. The best dose was to use 0.06% of Relict A® by weight of the feed. A 26.6% increase in laying hen egg production was found. Keywords: feed additives, laying hens, egg productivity, brown coal

The studies were carried out in the experimental housing room of FSBSI KSCZV on quails of Texas white breed. The purpose of the scientific and economic experience was to study the effectiveness of using a feed additive based on modified beer pellets in mixed feeds for young quail. Feeding of quail chicks was divided into 3 phases - "Start" - from daily to 14-day-old age, "Growth" - from 15 to 28-day-old age, and" Finish» - from 29 to 56-day-old age. The experimental group received an additive in a dosage of 1.5% by weight of complete feed. The research was conducted according to the" Methodology of scientific and industrial research on poultry feeding» (2000). During the experiment live weight, liveweight gain, the safety of poultry, cost of feed was determined. At the end of the experimental period, the economic effectiveness was studied. As a result of studies it was found that the live weight of the birds in the second experimental group significantly increased by 8.6% at 14 days age (p<0.01) and at 28-day age – 6.4% (p<0.01) in 42-day – by 4.7 % (p<0.05), daily gain over the entire period was higher in the experimental group for 4.6 %. The use of the additive did not affect the safety of the bird. Feed costs per 1 kg of growth were lower in the second group by 5.0 %, compared to the control. The cost of 1 kg of live weight gain of quails was less than the control indicator in the experimental group by 2.6 %. Also introduced feed ingredient allowed to get 5.08 rubles of additional profit from 1 head.

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