Se of post-extraction residue of Juniperus sibirica B. woody greenery in feed mixtures

The aim of the study is to develop a feed mixture based on the post-extraction residue of Juniperus Sibirica B. woody greenery for farm animals. To increase the digestibility, nutritional value of the feed mixture based on the post-extraction residue of Juniperus Sibirica B. woody greenery, a composition with wheat grain was selected and the resulting mixture was extruded. The post-extraction residue of woody greenery was obtained as a result of extraction with a water-alcohol solution of ethyl alcohol to extract biologically active substances. After extraction, about 70 % of the non-utilizable residue of woody greenery remains. The analysis of the chemical composition of the resulting residue showed the presence of protein (6.30 %); carbohydrates (51.20); lignin (25.40); mineral substances (6.20 %). The study researched the possibility of using the post-extraction residue of Siberian juniper woody greens as an ingredient in feed mixtures. However, the digestibility of this residue was only 28.40 %. Methods for increasing the digestibility and nutritional value of ligno carbohydrate residues are known, but most of them are labor intensive and economically ineffective. In order to improve the quality characteristics, the composition of the feed mixture, consisting of 13 % of the post-extraction residue of Juniperus Sibirica B. woody greenery and 87 % of wheat grain was selected, extrusion processing was conducted to increase the digestibility of the resulting mixture. The extrusion of the feed mixture was carried out on an extruder at a temperature of 100 °C, a pressure of 3 Pa. The study of the chemical composition of the resulting feed mixture showed the presence of: protein - 11.0 %; fat - 2.2; carbohydrates - 61.55 %. The digestibility of the feed mixture was 76.50 %, the energy value was 310.2 kcal.