In addition to strengthening the feeding before the winter and before the cold current, during the winter, the feeding should be properly based on the weather and the tilapia production to ensure that the tilapia will not lose weight. Generally, 1 kg of peanut bran is to be distributed per 1 000 fish per day. Right and left in the earthen pond, but when the water temperature is below 20°C, the tilapia feed intake should be stopped. When the weather is sunny, the curtains can be opened to adjust and exchange the air in the pool; when the temperature drops, the cold current When you struck, you must do the following:
(1) The film should be thickened. Try to choose a good quality film and increase the film size. In addition, two layers of film are pulled on the windward side of the north to enhance the insulation capacity.
(2) The base of the greenhouse should be thickened, and the fixed stakes should be lengthened to 1.5 meters.
(3) It is best to pull the dense wire some tightly, and to tighten the film tension.
(4) When the cold air comes, groundwater should be added to keep the water depth more than 2 meters. Because the groundwater temperature is high and stable, the temperature of the culture pond can be increased to prevent frostbite.
(5) Add a stove in the wintering pool. When the water temperature drops to 13°C, boil the water with a wok so that the steam passes directly into the room. The chimney of the stove surrounds the wall of the wintering pool to increase the indoor temperature and thus control the water temperature. Or use the electric heating rod to heat the pool water in the wintering shed, or use a water heater to heat the tap water to spray the water surface, so that the tilapia can safely survive the winter.
Doing the above work strictly during wintering can create a good living environment for tilapia, prevent the occurrence of frost damage, and increase the breeding income.
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