Autumn is a critical period for fish farming. The quality of pond water directly affects the growth of fish. Su Jianguo, a professor of animal science and technology at the Institute of Animal Science and Technology at the Northwest A&F University, suggested that farmers should make good efforts to regulate water quality in order to ensure that fish grow robustly and produce high yields.
Pool water dredging
In the autumn, the water temperature is high, and there is too much mud in the pool water, which will consume a lot of oxygen, which will easily cause the fish to float or flood the pond, and it is also not easy to manage the net operation. Therefore, dredging must be carried out to remove excess silt from the pond, and the sludge thickness is generally kept between 10 and 15 cm.
Water improvement
Lime and photosynthetic bacteria preparations are commonly used drugs for improving water quality. The occasional application of quicklime to the pond to regulate the water quality can not only improve the pH of the pond water, reduce toxic gases, and control the reproduction of pathogens, but also prevent the occurrence of fish diseases. However, it is necessary to use fresh, massive lime. When the water depth is 1 meter, 15 kg of lime are used per acre. After the slurry is poured, the whole pool is splashed evenly. Generally, it is applied once every 20 to 30 days. When photosynthetic bacterial preparations (available at the fish and drug store) are used for the first time, 5 grams per cubic meter of water are placed. After that, 3 grams per 10 cubic meters of water are put into use every 20 days or so. When used, the whole pool should be sprayed evenly.
Machine oxygen
Large amount of feed in the fall, fish excrement, water susceptible to contamination. It is necessary to insist on starting the aerator once in the afternoon from 2-3 p.m. on sunny days in order to regulate the water quality, promote convection of the water, increase the water-soluble oxygen in the pool and emit toxic gases. The stifling hot start time can be appropriately extended, and when the weather is cool, the boot time should be reduced.
Add new water
In order to increase dissolved oxygen and nutrients, new water may be properly filled to dilute the concentration of toxic substances in the pool water and restore the balance of ingredients contained in the pool water. In general, add water or change water once every 10 days to half a month. The amount of water injection accounts for one third of the total amount of water in the pool, and the water level should be maintained at 1.5 meters or more. If the water is seriously deteriorated, one-third of the pool water should be drained before injecting new water. The time for adding water should be selected from 2 to 3 pm in the sunny afternoon. In the evening, the filling of water should be prohibited.
Stir regularly
Stirring the mud at the bottom of the pond regularly can promote the circulation and metabolism of the material and the mixing of the upper and lower aquifers, promote the decomposition of organic matter in the bottom of the pool, release sediments and nutrients and trace elements in the sediment, and prevent the accumulation of harmful substances in the pool. Generally, the bottom silt layer is stirred by long bamboo poles or wood sticks, generally every 10 to 15
Pool water dredging
In the autumn, the water temperature is high, and there is too much mud in the pool water, which will consume a lot of oxygen, which will easily cause the fish to float or flood the pond, and it is also not easy to manage the net operation. Therefore, dredging must be carried out to remove excess silt from the pond, and the sludge thickness is generally kept between 10 and 15 cm.
Water improvement
Lime and photosynthetic bacteria preparations are commonly used drugs for improving water quality. The occasional application of quicklime to the pond to regulate the water quality can not only improve the pH of the pond water, reduce toxic gases, and control the reproduction of pathogens, but also prevent the occurrence of fish diseases. However, it is necessary to use fresh, massive lime. When the water depth is 1 meter, 15 kg of lime are used per acre. After the slurry is poured, the whole pool is splashed evenly. Generally, it is applied once every 20 to 30 days. When photosynthetic bacterial preparations (available at the fish and drug store) are used for the first time, 5 grams per cubic meter of water are placed. After that, 3 grams per 10 cubic meters of water are put into use every 20 days or so. When used, the whole pool should be sprayed evenly.
Machine oxygen
Large amount of feed in the fall, fish excrement, water susceptible to contamination. It is necessary to insist on starting the aerator once in the afternoon from 2-3 p.m. on sunny days in order to regulate the water quality, promote convection of the water, increase the water-soluble oxygen in the pool and emit toxic gases. The stifling hot start time can be appropriately extended, and when the weather is cool, the boot time should be reduced.
Add new water
In order to increase dissolved oxygen and nutrients, new water may be properly filled to dilute the concentration of toxic substances in the pool water and restore the balance of ingredients contained in the pool water. In general, add water or change water once every 10 days to half a month. The amount of water injection accounts for one third of the total amount of water in the pool, and the water level should be maintained at 1.5 meters or more. If the water is seriously deteriorated, one-third of the pool water should be drained before injecting new water. The time for adding water should be selected from 2 to 3 pm in the sunny afternoon. In the evening, the filling of water should be prohibited.
Stir regularly
Stirring the mud at the bottom of the pond regularly can promote the circulation and metabolism of the material and the mixing of the upper and lower aquifers, promote the decomposition of organic matter in the bottom of the pool, release sediments and nutrients and trace elements in the sediment, and prevent the accumulation of harmful substances in the pool. Generally, the bottom silt layer is stirred by long bamboo poles or wood sticks, generally every 10 to 15
Surf Board,Floating Surfboard,Inflatable Surfboard,Water Rescue Surf Board
jiangyin chenyi medical technology co.,ltd , https://www.chenyimed.com