Healthy Water Quality Control Technology of Shrimp

First, the quality of water before the release of shrimp cultivation Shrimp Chiqingchi disinfection into the filtered seawater, the shrimp pool water level of 1 meters to 1.2 meters, and then seal the sterilized. Can be used "fish safety" or "strong chlorine" 2ppm ~ 3ppm or bleach 20ppm disinfection. If the pool water glows at night, it can be treated with “shrimp seedlings clear” or “light extinguishing watersoul”. After disinfection for 3 days to 4 days, fertilize water. Pui water can choose plankton growth hormone, "fertilizer king", etc., can also be used urea, phosphate fertilizer. The amount of fertilizer used depends on the bottoms and depth of the pond. The standard of water quality training prior to the seedling investment is to make the water color brown, yellow-green, with a transparency of about 40 cm, a pH of 8.5 to 9.0, and groups of zooplankton activities can be seen at night or in the morning. After reaching the above criteria, shrimp can be used. A small amount of shrimp seedlings can be used to test the water before the seedlings are injected. After 2 days, the shrimp seedlings are observed to have normal activity and then cast seedlings. Second, after the injection of seedlings to control the quality of early water after the release of shrimp into the pool, as time goes by, zooplankton in the shrimp pond water such as Cladocera, copepods and rotifers will ingest phytoplankton, and shrimp will Ingestion of zooplankton, coupled with the growth and aging of phytoplankton itself, changes the biological composition of the water body, phytoplankton and zooplankton will decrease, and the color of shrimp ponds will change. At this time, according to the pool conditions and weather conditions, appropriate follow-up fertilizer. The choice of fertilizer and the amount of fertilizer can be determined according to the local conditions. At this point, the control of water quality standards is "fat" and "live." Third, the medium-term water quality control After the shrimp seedlings are released for one month, with the growth of the shrimp seedlings, their dietary feeding is mainly based on artificial compound feeds. The role of plankton in shrimp ponds is mainly to regulate the environment of the water body and regulate transparency, so it is necessary to control the growth of zooplankton. As the feeding of artificial feeds continues to increase, the amount of residual bait in the pond increases, together with the excretion of shrimp and the accumulation of organic matter in the pool of plankton, the shrimp pond becomes “fat”, and at this time it is necessary to reduce the “fat”. The method of regulation and control: First, when observing that the water is dark and the transparency is too low, some oxidation disinfectants may be splashed into the pool to oxidize the toxic substances deposited on the bottom of the pool and reduce the toxicity. At the same time, some algae can be killed and the "fat" of the pool water can be reduced. The second is to add new water, it is best to add clean fresh water. The standards for regulating water should be “clean”, “live” and “cool”. "Qing" - pure, no turbidity, no obvious suspended matter; "live" - ​​the color has changed, there is movement, not a pool of stagnant water; "cool" - refreshing. Fourth, late water quality regulation Shrimp aquaculture enters the later period (after 60 days). With the increasing number of shrimp feeding, the excreta of shrimp increases, and the zooplankton in the pool continuously age and die, resulting in bottom sediment organic deposits. With increasing numbers, shrimp ponds have become increasingly polluted. At this time, special emphasis has been placed on water quality management and regulation. One must accurately grasp and control the amount of feeding, do not overfeed. The second is to discharge sewage at the bottom of the site, and ponds with intermediate discharges should be drained. In the case of ponds without intermediate sewage, a sewage pump can be installed to suck out the dirt from the bottom of the pond. However, attention should be paid to the method of sewerage. Do not make the pool water "turn over". Third, after the clean-up, some substances such as the bottom of the pool, zeolite powder, white stone powder, etc. to improve the environment of the bottom of the pool should be splashed with oxygen disinfectant. Fourth, put some useful live bacteria in the disinfection for 3 days to 4 days to purify the water quality. Observed with naked eyes, the standard of water quality in the later period reached: deep brown water without turbidity, no smell, smell of algae but not odor, feel fresh and not sticky. It has been proved that the best aerator with the best aerobic effect and the lowest energy consumption is a combination of the blower tube type bottom aerated oxygen aerator and the surface waterwheel aerator to form a three-dimensional aerator. This method makes the pool The dissolved oxygen is even enough to promote the healthy growth of shrimp.

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