Matters needing attention in fish culture in spring

With the temperature rising, spring is slowly approaching, for fish farmers, spring is a headache, because spring is often the season of frequent occurrence of fish diseases, if we do not attach great importance to it and take preventive measures, it will bring huge economic losses to production. So what should we pay attention to when raising fish in spring? Let's take a look.

1. Topdressing fertilizer

Spring is the time to release seedlings, the seedling period can not be fed directly, generally take algae or plankton as natural bait, so first of all to develop algae and plankton. When the temperature is 8-10 degrees in spring, fertilizer should be applied according to the quality of water quality and the quality of fertilizer. Generally, 60-90 kilograms of human manure or 100-150 kilograms of animal manure are applied per mu. Of course, if there is no these farm manure, chemical fertilizer can also be used, the general ratio of nitrogen, phosphorus and potassium is 1 ∶ 1 ∶ 0.5, using the method of sprinkling in the whole pool, topdressing 5-7 kg per mu.

2. put in the bait

After overwintering, the physique of fish is weak, and the immunity is poor, and changes in the external environment can easily lead to some diseases of fish, such as water mold, rotten gills and enteritis. Therefore, it is necessary to feed the fish in time to enhance the resistance of the fish to avoid disease, and the choice of bait should also have quality assurance, so as to promote digestion, compensate nutrition and promote growth. It is best to feed bean cakes, wheat bran, cornmeal and other fine fodder at a fixed point once a day, with a feeding amount of 1.5% of the body weight of the fish, and gradually increase the feeding amount and feeding times with the increase of temperature. At the same time, feed the right amount of aquatic plants.

3. Water injection and water exchange

In early spring, the water temperature is lower, and the size of the fish is less, the activity space and food intake are smaller, so the water level of the culture pond should not be too deep. As the temperature rises, the head of the fish increases gradually, and the activity and food intake increase, so it is necessary to inject water in time to increase the water level. In the early spring, it is necessary to change the water once, to replace half of the water volume of the whole pool, and then to inject water once every semimonthly, raising the water level by 10-15 cm each time, and when the temperature reaches the temperature, the water level should be kept at about 1 meter. at the same time, we should strengthen water quality management and change water frequently. 1/3 is appropriate for each change of water.

4. Disease prevention and treatment

The aquaculture pond should be specially managed every day, and one inspection should be made every morning and evening to salvage the remaining bait and keep the water quality clean. The freshness of the feed must be ensured when feeding, and it is not suitable to feed rotten and spoiled feed. At the same time, regular disinfection, the use of various drugs to prevent fish disease, every half a month the whole pool sprinkled bleach powder, found that fish disease should be diagnosed and treated in time.

The above is the spring fish culture precautions introduction, hope to help you, want to know more related knowledge, please follow us.