After the spring, fish culture should have a good five levels

1. Disinfection of clear ponds: Remove excess silt from the pond and promptly renovate the pond. 10-15 days before stocking, seedlings, bleach, chlorine dioxide and other drugs were thoroughly cleared and sterilized. 2, seed stocking off: early release and early adaptation to the environment, early growth and prolonged growth period. At the same time, early-release fish species are not easy to be injured, are easy to transport, and have a high survival rate. In addition, the size of stocked stocks should be as large as possible and the specifications should be neat. 3, fertilization feeding off: After the spring when the water temperature reaches 8 °C above, the breeding of fertilizer fish (salmon, etc.), the main pond, should start chasing fertilizer to cultivate water in the natural food. The amount of fertilizer is determined according to the water quality. Generally, 80-100ks of organic fertilizer is applied per mu. The water quality should be kept yellowish-brown or yellow-green, and the transparency should be about 30cm. Ponds that feed mainly on omnivorous or edible fish should be fed as early as possible and fed once a day with regular feeds such as bean cakes, bran, and No. 4 flour. At the beginning, the feeding amount was 1% to 1.5% of the fish's body weight, and the feeding amount and the number of feedings were gradually increased as the water temperature increased. 4, water quality regulation: When the water temperature reaches IO ~ C, the fish began to move food, fish slowly increase, should deepen the water level in time. After the spring, it is best to change the water once, replace 25% of the pool water, and then inject fresh water every 15 to 20 days, gradually raising the water level to more than 1m. At the same time, it is necessary to prevent sewage and enemy creatures from flowing into the pool. 5, prevention and control of fish diseases: With the rise of water temperature, bacteria multiply and accelerate, fish disease also began to increase. In addition to the disinfection and prevention of disease before clearing ponds in stocking, we must also do a good job: (1) Use salt water or potassium permanganate for disinfection when the fish species enter the pool; (2) Use chlorine dioxide every 15 to 20 days , Dibromohydantoin and other drugs Quanchiposa once; (3) often remove the food bait, fresh water regularly to improve the deterioration of water quality; (4) found that fish disease symptomatic treatment in time.

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