Practice of application of fish rotation in KFH “BAM” Astrakhan region

Abstract

The modern development of pond aquaculture dictates the need to improve biotechnologies to increase productivity, reduce costs and produce highquality fish products. Fish rotation is a system of sequentially growing fish and crops to improve the soil and optimize the natural food supply in ponds in order to increase the productivity of the crops grown. In recent years, this practice has been widely developed in many farms of the country, and in particular, in the BAM peasant farm, which is one of the largest in the Astrakhan region, where up to 400 tons of fish and 700 tons of fish are produced annually on six hundred hectares of pond areas. gourds. On the basis of this farm, in the fish-breeding season of 2021, studies were carried out, according to a comparative assessment, of the fish-breeding indicators of carp and herbivorous fish grown in three ponds before and after melon crops. The temperature and hydrochemical regimes, changes in the weight of the studied individuals and the total biomass of fish in the ponds for the season from March to September, as well as feed costs, fish productivity and melon crops were studied. Carp were fed manually in the ponds with wheat or barley, which were applied to feeding places once a day in the morning, with a volume of 5% of the total fish biomass. This year, one pond was taken out for flying, and melons were grown in it, and in pond No. 4, experimental work was carried out to grow cyprinid fish species after cultivating melons in it. The obtained results indicate that the use of ponds for growing gourds — melons allows for the next year to improve the natural food base, which has a positive effect on fish breeding indicators: survival rate, fish productivity and reduced feed costs. Growing gourds in fish ponds improves the yield of melons by 24.4% compared to normal conditions.