Early spring fish farming four attention

The one-year plan is spring, and the management of spring is particularly important for the entire process of fish production. 1, water injection. In early spring, the water temperature is low, the individual fish is small, activities and food intake are small, so the pool water should not be too deep. As the water temperature rises, the fish body increases, and the water level can be gradually deepened. It is best to change the water in large quantities once. The amount of water to be changed is about 1/2 of the total amount of water in the whole pool. Afterwards, water is injected every 15 days. Each time, the water level is increased by 10-15 cm, and the pond water level is maintained at about 1.0 m in March-April. When water is injected, it is necessary to prevent the inflow of sewage and enemy pests. 2, fertilization. When the pond water temperature reaches 8-10°C, the fertilizing material is used to cultivate natural food organisms in the water. If fertilizer is used, it can be applied at a ratio of 1:1:0.5 of nitrogen, phosphorus and potassium, 3-5kg per mu, and topdressing once every 10 days until the water body remains yellow-green or yellow-brown and the transparency is about 30cm. 3, feeding. When the water temperature reached 10°C, the fish started feeding. In the early spring, the main feed was pure bait, which was fixed at a regular time and fed once a day. Each feeding amount was 1% to 2.5% of the total weight of the fish. After that, the daily feeding amount was gradually increased as the water temperature increased. Can reach 2%-3.5%, and changed to two feedings. The main grass carp fish pond should be given appropriate amount of water, and the amount of feeding should be within 4-6 hours. In addition, the specific daily feeding amount depends on the water temperature, the weather, and the fish's feeding conditions. 4, prevent disease. 1 Adhere to the daily morning and evening patrol, check the water quality, determine the amount of fertilizer and feeding; 2 timely recovery of residual baits to keep the water fresh; 3 prohibit the feeding of bad food; 4 regular drug prevention, the specific approach is: every two weeks Chlorine or bromine preparations and copper sulphate alternately spilled once; 5 If fish disease is found, timely diagnosis and treatment to prevent the spread of large areas of fish disease.

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