In order to make small fish survive the winter safely, it is necessary to strengthen the measures of fish fingerling cultivation in autumn.

Do a good job of fish breeding in autumn, especially those whose specifications are still small, and apply intensive cultivation measures to increase their body length and weight as soon as possible to ensure safe overwintering, so as to lay the foundation for high fish yield in the coming year.

Fish species

First, adjust the density and raise at different levels. After entering autumn, the suitable weather with cooler temperature can be selected, and the fish species with uneven size in the pond can be selected and classified according to large (about 20 cm), medium (about 15 cm) and small (less than 15 cm). Large fish species can be transferred to adult ponds with large area and good conditions for mixed culture, medium and small fish species, and intensive culture in different places. Stocking density, the general water depth of about 1.5 meters of fish ponds put 3000 million 5000.

Second, fertilize according to the water and feed rationally. In the fry ponds dominated by silver carp and bighead carp, in addition to fertilizing the water to maintain the suitable fertility of the pond water, it is also necessary to feed an appropriate amount of concentrate feed, that is, bran, cake or compound feed at 9: 00 a.m. and 4: 00 p.m., 0.5 kilogram per thousand fish species. Grass carp-based cultivation ponds, in addition to feeding sufficient amounts of duckweed, tender grass, grass pulp, etc., but also add vegetable cakes, rice bran, cotton cakes, wheat bran or mixed feed, first green feed, and then concentrate.

Third, strengthen management and pay attention to disease prevention. Autumn air temperature, water temperature is more suitable, fish disease is the most popular, especially grass carp, autumn disease is serious, if the disease prevention work is not strengthened, once the fish disease epidemic, serious losses. Therefore, it is necessary to maintain morning, middle and evening pond inspection, observe fish feeding and activities, adhere to the "four determinations" in feeding, remove residues in time, disinfect food farms and tables regularly, feed disease prevention baits and sprinkle disease prevention drugs regularly. It is necessary to pay attention to the water quality of fish ponds, timely add new water, and apply quicklime (about 20kg per mu) in the whole pond about every 20 days, so as to improve water quality, prevent diseases first and treat diseases early.