Tilapia is a fast-growing, disease-resistant, fast-growing, low-cost, high-yield farmer, and is a good way for farmers to get rich. However, tilapia is a tropical fish with low cold resistance. In the winter and spring, when the water temperature drops below 10°C, it will be frozen to death. Therefore, in the winter and spring culture of tilapia, attention should be paid to preventing and controlling the occurrence of frost damage.
Tilapia that naturally overwinters in outdoor ponds must adopt certain insulation measures during periods of low temperatures and cold currents in winter, such as greenhouses on the ponds, covering plastic film insulation to prevent freezing damage. The specific method is:
The shed is first constructed of bamboo and wood to form a “human†type scaffold. The distance from the bottom of the pool to the shed is about 4 meters. Then pull the wire rope from the top to the side of the pond and fix it with a short wooden stake. The pull wire rope should be kept in parallel at a spacing of 25 Centimeters or so. Finally, cover a 0.8mm white polyethylene insulation film, connect with the poolside to form a sealed insulation cover, and reinforce it with ropes to prevent the wind from being lifted. Leave a drain at the junction between the membrane and the pond base to prevent cold water from seeping in in winter. In the pond. In addition, there are several movable curtains around the pool for daily entry and exit.
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.
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