the object of the application is way to produce plant growth promoter of natural substances containing keratyn u0119 undergoing pre-treatment.treatment consists of removal of contaminants and fats, fragmentation to average particle size 0.1 - 5 mm, conditioning, steam and / or water and / or weak acids and / or weak rules, and then subjected to chemical hydrolysis of fibre obtained.method of production promoter is characterized by the fact that the raw material is divided into two portions, one of which is subjected to acidic hydrolysis at 80 - 200 u00b0c using sulphuric acid at a concentration of 20 to 98% by weight and / or phosphoric acid at a concentration of 20 to 76% by weight, the use of 0.1 - 5 g per 1 g of fibre contribution and leads hydrolysis by 1 - 14 hours.while the second portion of the fibre is subjected to alkaline hydrolysis at 60 - 200 u00b0c, using potassium hydroxide and / or sodium hydroxide and / or calcium hydroxide, about 10 to 99 mass% purity used in from 0.01 - 5 g per 1 g of the fibre and prowad pi hydrolysis by 1 - 14 hours.and then after ostudzeniu both hydrolysates to temperature not higher than 65 u00b0c connects with hydrolizatem acid hydrolysate alkaline ratio from 1: 1 to 1: 20, by introducing acidic to alkaline hydrolysate by intensive mixing hydrolysate and maintaining temperature process to 65 oc and ph 3 - 11.the suspension is subjected to cooling and filtration, with at least 70% hydrolysed protein content of 15 to 35% by mass of biologically active l - amino acids capable of kompleksowania minerals and sediment in quantities of not more than 30 mass% suspension, containing fatty acids and non solubilised macromolecular polypeptides, which turns to the contribution of the fibre.
