Fish Feed Machine Knowleagde

Farmers know that after several years of use after excavation of fish ponds, problems such as collapse, silt deposition at the bottom, and blockage of water inlets and outlets will occur. Although regular fish pond maintenance is indispensable, the most important thing is to conduct an overall management every year after all farmed fry are caught in winter. Let our fish ponds look new when we stock fry in the spring of the second year.

1. Remove the silt at the bottom of the pool
Because most fish ponds are geologically exposed to soil blocks, after a year of pond soaking and rain washing, many collapsed soil blocks sink to the bottom and produce silt, which reduces the actual use area of fish ponds and every winter After the fish are caught, remove the excessive and thick silt from the bottom of the pond, and remove a part of it, and keep it at 10 cm, so as to maintain the depth and water volume of the fish pond. Avoid the shallow ponds, the reduction of fish carrying capacity and the lack of oxygen in the water body; at the same time, the silt is also a hiding place for pests and diseases, which is prone to outbreaks of various fish diseases in the hot season. Therefore, the dredging work in winter is indispensable.

2. Supporting inlet and drainage channels
Because of the lack of breeding technology and practical experience. Many fish ponds only pay attention to the width and height of the dam during the design, and neglect the water supply and drainage facilities, which makes them very passive after the start of aquaculture. They have to temporarily pump water for drainage, which is a waste of manpower and material resources. During reconstruction, the inlet and outlet channels should be arranged in parallel and opposite directions. Pay attention that the inlet channel is higher than the drainage channel, and pay attention to the total inlet opening to the fresh water area of the outer river, and the total outlet opening to the mouth of another river. Drains in the same water area to prevent fish diseases after production. At the same time, it is necessary to do a good job in the safety of inlets and outlets, adopting the form of small gates or dam bridges. Ensure that the fry is not lost while ensuring that the water intake and drainage functions are not affected. It would be a big joke if the sugar fish ran away because of the establishment of the water intake and drainage system.

3. Ensure the depth of the pond
The depth of the pond water level should be strictly controlled at different stages of aquaculture, which will not only help increase the use area of the pond by the fish. At the same time, the oxygen content in the water is guaranteed. Too shallow pond water will affect the increase in output. For the collapsed dam, the soil of the part of the dam that has not collapsed can be used to excavate the soil directly to make the inner slope of the new dyke, so that it has a binding force higher than that of silt. The new earth was used as a dam, which solved the problem of silt excavation in the pond. As for the soil that has collapsed like a pond, it will be removed at the same time when it is dredged in winter.

4. Disinfection during the clearing of the pond
For fish ponds that have been dredged in winter, disinfection treatment must be carried out to ensure that the fish ponds are treated against overwintering pests. The specific method is to discharge the reconstructed fish pond to 5-10 cm, and then dig a few small pits at the bottom of the pond, the pit depth is 0.1-0.5 meters, the area is 0.5 square meters, and the distance of each small pit is 100 square meters. Calculate the layout so that the entire pond can be sprayed evenly, and 70-100 kilograms of quicklime is used per mu. Spray the quicklime into the small pits arranged in advance according to the proportion, and let the quicklime react with the water slowly to take effect.