No abstract

Recently, great interest in agricultural production has been manifested to preparations of biological origin. Production of biostimulants is in great demand, as small concentrations of these substances are able to maximize the potential of plants, increase their quality and productivity. One of the promising sources of biostimulants is keratin-containing raw materials. It is characterized by a high content of keratin protein. The peculiarities of its chemical composition and structural and mechanical properties require a concretization of the approach to the methods of processing and processing of this unconventional type of waste. Due to enzymatic hydrolysis of keratin preparation of actinomycete Str. chromogenes s. g. 0832 managed to obtain a highly effective biostimulator for plants. The content of free amino acids in it is 82.2%. Hydrolysate contains all essential amino acids; the sum of essential amino acids was 42.66 %. In the comparative evaluation of the biostimulator from keratin pen and the preparation of plant origin “Ribav Extra” the best results were obtained when processing corn seeds with hydrolysate of animal origin. The germination energy in this case was higher than the control samples by 18%, germination increased by 10% compared to the control and by 5% compared to Ribav Extra.

The article is about the bone residue compositions analysis obtained from low-value poultry parts processing via the mass-metric parameters, chemical, fractional, amino acid, fatty acid, and mineral contents. The conditions for obtaining protein concentrate by the thermal method and low-temperature fractionation are reasoned and mathematically interpreted. Their proved high biological and nutritional value, identical taste and aroma properties, physiological usefulness and harmlessness allow recommending the invented products as a basis for the dry soups production, including the “premium” class.