Enhanced feeding and fertilization 1. Ponds mainly fed by grass carp, catfish, tilapia, etc. are generally fed on the 1st twice, that is, 10am and 3pm respectively. The high temperature season can be changed to 9 am and 4 pm. Forage grass is thrown in the forage basket erected on the surface of the pool; granular compound feed is used to form conditional reflection by tapping buckets, etc., and is fed on a certain range of water surface; cakes, bran and other fine materials are soaked and then thrown into underwater bait. On the stage, each meal was fed for 2 hours to 4 hours. 2. For ponds mainly containing filter-feeding fish such as eel and oyster, timely top-dressing should be performed to supplement the water with nitrogen, phosphorus and potassium. 7 days to 10 days topdressing once, each urea 2.5 kg of urea, superphosphate 5 kg, add water-soluble Quanchiposa. When applying organic fertilizers, it is best to sprinkling water. Usually, manure (wet) is applied for 75 kg to 100 kg per application and sunny days.
Maintain ponds with good water quality and high water levels to support pupa and squid; water should be kept green or dark brown, with a transparency of 20 cm to 30 cm, ponds with mainly grass and squid, and ponds with more water and squid The water is lighter, and fresh water should be poured every 7 days to 10 days. Each time, the water level should be raised from 15 cm to 20 cm. The maximum water level should be maintained throughout the summer.
Active prevention of disease requires mastering the principle of prevention. Fish pond disinfection. Generally, 15 kilograms of lime are used per acre per month, and the slurry is splashed in Quanchiposa. Early summer is the time when grass carp enteritis is apt to occur. It can be fed regularly with baits. Each 50 kg of fish is fed with 0.7 to 1 g of furazolidone for 6 consecutive days, or smashed garlic per 5 kg of feed. 0.25 Kilograms or 0.2 kg of salt are fed.
Adhere to the patrol pond in the morning and observe the water quality in the pond and the activities of feeding fish in the pond.
Summer is an important period for the formation of fish production throughout the year, and it is also a time when fish diseases will spread. In order to ensure the stability and high yield of fish ponds, summer fish should grasp the following four points: