Ecological regulation of wintering fish pond water temperature

January 08, 2021

Using ecological regulation to increase the temperature of overwintering fish ponds can not only enhance the fish's ability to feed in the winter, but also maintain the body fat and reduce the freezing damage, and increase the survival rate of pond fish. Practice has proved that using this method to regulate the temperature of the fish pond water temperature can be adjusted than the fish pond water temperature increased by 2 °C, no wind on sunny days with rising temperatures, water temperature can rise above 3 °C, the survival rate of most species of winter fish can be about 70% The survival rate of the first-year grass carp species above 12 cm can reach over 95% when raised to about 90%. Here are three methods for regulating the water temperature in overwintering fish ponds.

First, the combination of fish and pond adjustment. When the temperature suddenly drops to the river before freezing. The location where the species and ponds spend the winter should be selected as a wintering pond with a leeward sunny area, an area of ​​1500 to 2500 square meters, a rectangular, east-west fish pond, or a temporary wind-break wall constructed with higher crop stalks on the north side of the pond to protect against cold currents. Attack. In the south of the fish pond, there should be no sheltering materials such as tall trees and buildings to facilitate sunlight and effectively increase the water temperature.

Second, pumping temperature and oxygen increase regulation. After a high temperature on sunny days in the sunny day, it is best to use a submersible pump to pump water from one end of the pond to the other end of the fish pond between 12 noon and 3 pm, so that the water can be sent to the other end of the fish pond over long distances before entering the fish pond. The pool water can fully absorb the heat in the air and the ground in the water channel, increase the water temperature, and increase oxygen. Rainy days or sudden drop in temperature should stop the pumping, so as not to reduce the temperature of the pool water. The canal is to be open on the leeward sunny slope of the north of the pool so that the sun is as strong as the heat and heat. The water depth of the fish pond should be maintained at about 2 meters. If the depth is too deep, the temperature of the water will not be increased, and the temperature difference will change too much.

Third, improve water level fertilizer regulation. Before the wintering of the fish species, the water level of the seed pool below 2 meters deepens to more than 2 meters, and it is better to reach and maintain about 2.5 meters. While deepening the water level, 6000 to 8000 kg of manure and livestock manure are applied at a higher concentration per acre fish pond. Fertilize with water for 2 to 3 days and then add the fish to winter. In this way, winter fish ponds are generally not easy to freeze.

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