The key technology of pooling and cultivating fresh shrimp is to regulate and control the water quality. The key is to handle the relationship between fertilizer and water and floating heads. The evolution rule of the shrimps' feeding is gradual transition from ingestion of plankton to feeding benthic organisms, gradually changing from filter habit to predation habit. Therefore, it is necessary to “fat and raise young shrimp and clear water to feed the shrimpâ€. In February, digging and composting around the pool edge, with the gradual increase of temperature, the water level gradually increased, the fermentation of mature manure will naturally dissolve into the pool. If the amount of plankton in the pool water is insufficient from March to April, when the transparency of the pool water is more than 40 cm, 50 to 100 kg of fermented manure water should be applied to the pond per acre. In mid-to-late April, egg-holding shrimps are generally present. At the same time, due to the large temperature difference between day and night and high oxygen consumption, the first floating-head season of the shrimp ponds is coming. The focus of water quality management should be changed from adding top-dressing to changing water and increasing oxygen. In particular, in mid-May, the water quality changes rapidly, and more attention should be paid to changing the water. From the original 20 centimeters per half a month to changing the water 2 to 3 times a week. When changing the water, it is necessary to add water first after draining, but not on one side; when pumping with water, it is not possible to open the surface water without draining; change the water in the morning and not change the water in the evening. In June, the water quality in ponds tends to deteriorate. At this time, large areas should be changed and old water should be removed. At the same time, use drugs to disinfect water and replace it with new water. Medium and young larvae consume more fertility, and they must cast small amounts of human and animal manure several times to promote water quality. From July to August, especially at the end of the second floating season beginning in late July and early August, fertilization should be stopped and water changes and pond inspections should be stepped up. The transparency of the pool water quality is 40 and the brown color is better. If pool ponds are found clustered on the grass and gathered on the grass, "should not be disturbed and the light should not be returned", oxygenation measures should be taken immediately to avoid accidents. In addition, every time water injection and drainage are performed, Nylon Sieves shall be inspected, and damages shall be promptly replaced to prevent wild fish and stings from entering the shrimp ponds. As a means of supplementing calcium, when a shrimp species of more than 3 cm is cultured, 20 kg of quick lime can be used to adjust water quality per acre.
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