Early Spring Management of Fish Ponds

Good management of fish ponds in early spring can promote fish to eat earlier, restore constitution, increase disease resistance and increase survival rate.
1. To raise the water temperature within the appropriate temperature range, fish will increase food intake and increase growth as the water temperature rises. Therefore, the water level of the fish pond in early spring should be controlled at 0.6-0.8 meters, so that the water temperature can be increased quickly to facilitate the full play of fertilizer efficiency and to encourage fish to eat earlier. After the beginning of spring, it is necessary to dilute the water. For ponds with poor water retention, do not inject a large amount of fresh water at the same time so as to prevent the temperature of the water from falling abruptly. Appropriate organic fertilizer should be applied to improve the water temperature. In case of continuous rainy weather, it is necessary to increase the water depth appropriately so that the temperature of the water temperature changes too much.
2. After adjusting the water quality in the spring, as the temperature and water temperature rise gradually, the fish's biological feed begins to multiply. If water quality is found to be aging and acidic, 20 cm deep fresh water can be injected and 20-30 kg lime can be splashed in the whole pool per acre. When the water quality is lean, appropriate organic fertilizer should be applied to maintain the medium-fertilizer quality. The transparency should be 30-40 cm. Generally, 200-300 kg fresh pigs and cow dung can be applied per mu (1 mu = 667 square meters). Application once every 15-20 days; can also apply chemical fertilizers, such as Ammonium bicarbonate, calcium magnesium phosphate fertilizer each 2.5 kg, or urea 1 kg, superphosphate 2 kg, add water 20-30 times Quanchiposa.
3. Timely start eating When the surface water temperature rises to about 10°C, the fish start to eat a small amount, sometimes the food is still relatively large. If a small area of ​​muddy water appears on the bottom of the pool, frequent fish activity indicates that the fish is in a state of hunger. . When the surface water temperature reaches 3°C, it is fed once a week; when the surface water temperature rises to 10°C, it is necessary to feed it once a day or every other day when the surface water temperature is fine, and the amount of each feeding is about 1/6 of that in summer and autumn, or Take 3-5 hours to finish. At the same time, it can be introduced and domesticated. The method is: first use 3-5 days to sprinkle a small amount of fine material on the edge of the food table to lure, and then gradually narrow the scope, until fixed-point feeding on the food table, this can improve food utilization.
4. Early prevention of fish diseases such as prolonged starvation can cause growth stagnation and increased disease. Therefore, strengthening early feeding and management is an effective way to increase fish disease resistance. In addition, in the pond early spring water injection, winter wax water should be injected as much as possible, because this water with less pathogenic bacteria, will help reduce the occurrence of fish disease. The common fish disease in spring fish ponds is mainly watery mildew. This is a fungal disease that is caused by injury to fish body due to careless operation. 400 mg/kg of salt and 400 mg/kg of baking soda mixture can be used to control the whole pool by splashing or dipping fish. In addition, parasitic diseases such as trichomonads and caterpillar fungus also occur from time to time, and 0.7 mg/kg of copper sulfate and ferrous sulfate (5:2) can be used for treatment.

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