Recently, the cold wave struck and the sudden drop in temperature brought great influence on the aquaculture industry. If handled improperly, it can easily cause stress response and even death of tropical species such as tilapia and bamboo shellfish. Therefore, farmers need to do the following:
1, before the sudden drop in temperature, the water temperature decreases relatively slowly, should seize the time to raise the water level, generally can deepen the water to 2 ~ 2.5 meters, with oxygen in the bottom layer can be deepened to 3 meters, so that water temperature is relatively slow The water quality is relatively stable and the water color will not suddenly change suddenly. Or put some straw in the fish pond to enhance the fish pond insulation capacity.
2, cold weather should not be too much stirring the water, disturbing fish. Minimize or stop blocking operations to avoid damaging the surface of fish. If tilapia develops hydromycosis, splash it with a mildew package or splash it with ginger.
3, stable water pH. Lime can be used in small amounts to adjust the pH and is generally used around 10am and 22:00pm. Concentrating the water color to maintain the transparency of the water body at 20-30 cm can also alleviate the freezing damage. You can use longer-lasting organic fertilizers and use as little fertilizer as possible with high phosphorus content to avoid large amounts of blue algae breeding when the water temperature rises ( In particular, freshwater ponds cause deterioration of water quality. About 5 days, the use of a pond detoxification treasure to promote the release of water body fat, to achieve the purpose of long-term stability of color.
4. Under low temperature conditions, due to low light intensity, algae reproduction in the water body is affected, and a variety of harmful and toxic substances are likely to accumulate at the bottom of the pond. Once the water temperature suddenly increases, a large amount of toxic substances will be turned up from the bottom of the pond, resulting in Luo Fei. Fish disease should be prevented early. Can use non-oxygen-consuming microorganisms to adjust, such as photosynthetic bacteria, 2 to 3 kg per mu.
5, conditional, can be covered with greenhouse, or build a wind shield in the north of the pond to reduce the cold blast on the surface of the water.
Summary: For tilapia in winter, heat preservation is the key. Only by keeping the water temperature at the optimal growth range of tilapia, can tilapia grow up healthily; in addition, it should maintain water quality and create favorable conditions for the growth of tilapia. .
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