INFLUENCE OF WHITE LUPINE ON THE PRODUCTIVITY OF RAINBOW TROUT

Abstract

The problems that have recently faced the Russian fish farm often require non-traditional solutions based on the introduction of advanced feeding technologies. Therefore, in the research process, the authors studied the fish-breeding, biological, morphological and biochemical characteristics of the rainbow trout of the Adler breed when grown in industrial conditions using native white lupine (with a shell) and without a shell as a source of protein in feeding. The data obtained from the experiments indicate more intensive gains in the experimental groups. The highest increase was obtained in the 3rd experimental group, where the diet structure contained white lupine without a shell in the amount of 22%. The absolute increase in this group was higher by 28.89%. In the 2nd experimental group, the growth was higher by 2.55%, and in the 4th experimental group, by 5.74%. The safety of trout in all experimental groups was almost the same. The cost in the 3rd experimental group to the control was lower by 32.24%, in the 2nd experimental group - by 7.94% and in the 4th - by 21.33%. The profit from the sale was also higher in the 3rd experimental group compared to the control group by 106%, in the 2nd experimental group - by 17.76% and in the 4th experimental group- by 47.9%. The study of white lupine in diet structures can become the basis for a fundamental expansion of knowledge about the biochemistry of fish protein nutrition and practical recommendations on using white lupine in mixed feed for rainbow trout.