How to protect fish from freezing in winter
Wang Lingfang
1. Water injection to warm The temperature of the fish pond is increased by adding water, so that the fish can safely survive the winter under the water. There are also tips for adding water, you can choose a warmer weather, and inject the sun-based water into the fish pond, so that the temperature will be very high.
2. Put aquatic weeds In the cold winter, put a certain amount of aquatic grass into the fish pond, and the fish like to live around the aquatic grass, and at night they will drill into the aquatic grass to rest. Therefore, adding aquatic grass to the pond in winter can provide a warm resting place, thus ensuring the safety of the fish.
3. Set up obstacles to avoid the wind Artificial wind shielding devices are set up in the north and northwest directions of the fish pond. Pile the pile first, connect it with an iron plate, or connect it with a woven bag. After the windshield device is built, it can avoid the cold wind blowing directly through the fish pond, so that the water temperature of the fish pond can be improved and the fish can grow better.
4. Build a plastic greenhouse The method is to build a "human" shaped roof along the edge of the pond with bamboo or wood on the pond, the distance from the ground to the roof is about 2.5 meters, covered with two layers of plastic film, connected with the edge of the pool to form a sealing cover, and the film can be sealed with mud around. At night or rainy days, thick grass curtains and other coverings can be used to maintain the temperature in the shed, and on sunny days, the grass curtains and other coverings should be lifted and the solar energy should be used to heat up. When the water temperature is too high, ventilation should be ventilated and some new water should be filled. If the breeding is a high economic value and not hardy breed, if necessary, it is necessary to adopt heating facilities.
5. Smoke and heating During the day, the north wind whistles is a precursor to frost at night, and wet straw and firewood can be stacked on the shore of the fish pond to make fire and smoke to create heating and weaken the degree of frost.
6. Oxygenation, insecticide, disinfection, to prevent lack of oxygen in fish ponds The water surface of fish ponds is very low, especially when the water surface is frozen, the oxygen in the water is very scarce, which will easily lead to the death of fish hypoxia. If you want to improve the survival rate, you must have an oxygen supply device that inflates the water to increase oxygen. The air pump is used to pump air into the hose placed in the water, connect a sand filter at the bottom of the hose, or prick many small holes in the hose, so that the air diffuses into the water in the form of small bubbles, thereby increasing the contact area between air and water, thus increasing the oxygen content of the pool water. In the case of extreme lack of oxygen, the oxygen cylinder can be used to directly transport pure oxygen through the hose to the water under the ice surface, and give the fish oxygen first aid. At the same time of oxygenation, it is also necessary to timely apply insecticides for effective prevention and control, so as to achieve cold pests, diseases and prevention and treatment, when there are 2 to 3 consecutive sunny days before a large cooling, you can choose a broad-spectrum insecticide to kill insects, after insecticidal, it is recommended to use disinfectant to promote the wounds caused by parasites on the fish body can be repaired in time to avoid infection.
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Practical Techniques for Pond Fish Farming ¥11.6 Purchase