Determination of Biosafety of Various Doses of Chlorella Vulgaris Microalgae Biomass When Feeding it to Quails

Abstract

All feed additives used in the feeding of farm animals and birds must be bio-safe and undergo a toxicological assessment before widespread use in poultry farming.  Scientific and economic experience was carried out in the farm Alimchuyeva Z. I. Medvedevsky district of the Mari El Republic, where 5 groups of quails of daily age of Texas breed were formed on the principle of analogues, 20 heads each. The conditions of feeding and keeping were the same for all quails. Poultry of all groups received mixed feed PK-5 start 1-3 weeks, from 4-7 weeks PK-5 growth. The first experimental group received daily dry biomass of Chlorella vulgaris microalgae at a dosage of 2 mg/kg of live weight, the second experimental group – 4 mg/kg of body weight, the third-6 mg/kg of body weight, the fourth-8 mg/kg of body weight, the fifth – 10 mg/kg of body weight. The control group received a basic diet. The duration of the experiment was 7 weeks. The results obtained showed that dry biomass of Chlorella vulgaris microalgae at a dose of 4 mg / kg of body weight is safe during daily administration to quails, which is confirmed by clinical signs and morphobiochemical parameters of blood. Increasing the amount of feed additives to 10 mg / kg of body weight does not significantly affect the improvement of the required indicators, so it is not economically justified.