Efficiency of lamb fattening with the use of soybean waste

The use of soybean waste in fattening ruminants is widespread among farms in the Amur region as a region specializing in soybean cultivation. However, the issue of efficiency of introduction of soybean straw and soybean forage into the main ration of fattening animals re- mains open due to the content of anti-nutritive substances in these feeds. The aim of the work is to study the effectiveness of the use of waste soybean production in fattening lambs with the justifi- cation of indicators of meat productivity, enzymatic activity of blood and the level of profitability The article presents the results of the study of enzymatic activity of blood serum and indicators of animal productivity in scientific and production experiment with the use of soybean straw and soybean forage in the main diet. The comparative analysis of economic efficiency indicators of using soybean production wastes in the amount from 50% to 100% in sheep fattening was carried out. Proceeding from the nutritive value of soybean production wastes, at 50% replacement of hay with soybean straw and concentrate part with soybean forage the assimilation of nutrients of feed by animal organism increases, which is characterized by strengthening of enzymatic activity of blood serum, increase of live weight gain and as a consequence a higher level of feed payback.