Brewer’s yeasts for chickens
Autolyzed brewer’s yeast (ABY) – is a feed additive that enables to
- guarantee the safety of poultry by 98 – 100%.
- increase chickens’ body weight gain by 16,8%
- increase the slaughter yield by 2 %.
- increase the energy value of broiler chickens’ meat by 15,3 kcal; increase the concentration of free indispensible and semi-essential amino acids in the chickens’ blood serum by 1.26 – 1.66 mg %
- increase the content of phosphorus in the chickens’ blood serum by 4,8 -2,4 %.
This data had been verified by researches conducted by the Candidate of Biology Sciences Fedosova Aurika Andreevna (Federal State Educational Institution of Higher Professional Education “Moscow Academy of Veterinary Medicine and Biology named after K.I. Skriabin”) Link to the material.
In terms of chemical composition, ABY is comparable to fish meal, at that, it contains the protein hydrolysis products such as amino acids, peptides, etc that have high accessibility and immunomodulatory properties.
Dosage: optimal rate of ABY inclusion into compound feeds – 1% (10 kg / t).
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The analogical researches have been conducted by a group of scientists of the Institute of Ecology and Evolution Issues named after A.N. Svertsov for RAS, the zootechnical efficiency of application of dry brewer’s inactive yeasts to rations of birds, broiler chickens and laying hens.
In the experiments on broiler chickens, the control group received the full-ration compound feed with soy meal and fish meal. In experimental groups such components were partially substituted with the dry inactive brewer’s yeasts. Inclusion of 3% and 5% of brewer’s yeasts into broilers rations in lieu of a soy meal portion and 4% of brewer’s yeasts in lieu of 1-2% of fish meal and a portion of soy meal enabled safety of young birds at the rate of 97, 1-100%, which is by 2.9-5.8% greater than in the control group.
The body weight of young birds of experimental groups 1 and 2 surpassed that indicator of the control group by 5.1-5.2% and by 4.7% for the third group.
At application of dry inactive yeasts in the rations, the broiler’s average daily body weight gain of the experimental groups was higher of that of the analogues from the control group by 4.7–5.3%. Over the entire period of growing, feed expenditures per body weight gain kilo in experimental groups were lower by 6.7% than those of the control group .
Therefore, it is recommended that broiler chickens be fed with inactive dry brewer’s yeasts within the content of full-ration compound feed in a dose of 3–5% in lieu of a portion of natural-origin protein feeds and within the amount of 1-2% in lieu of fish meal.
It has been established by the researches on laying hens that inactive dry brewer’s yeasts may be included into their rations within the amount of 2–4% in lieu of the portion of soy meal and fish meal, obtaining by that high productivity and safety of poultry. At that, hens of these groups willingly consumed the feeds and did not differ from the control group in terms of their consumption.
Egg-laying intensity in the experimental groups was within 89.6 -90.6%, which is 2,9-3,9% higher than that of the control group.
(Source: “Compound Feeds” magazine №7, 2012, Authors: I. Egorov, Dr of Biol. Sc., B. Rozanov, T. Egorova, Candidates of Agr. Sc., VNITI of Bird Breeding N. Ushakova, Dr of Biol. Sc., Institute of Ecology and Evolution Issues named after A.N. Severtsov of RAS) Link to the article .