After finishing the pond, disinfect it on a sunny day two weeks after adding fish. There is 5 ~ 10 cm deep water left in the pond, and several small pits are dug around the bottom of the pond, with 60 ~ 75 kg of quicklime per mu. After the grass was turned, all the grass was scattered. The usage can be increased or decreased according to the amount of mud in the pond. After use, the effect of stirring the water area is better, and no peripheral dead angle is left during disinfection. The imperial temples should be reasonably divided and cultivated according to specifications, and the specifications of the imperial temples in the auditorium should be the same. Large-sized fry have strong predation and large appetite. Therefore, small fish may not get enough bait when stocking small-sized fish, which leads to physical decline. Fish above 200px should be cultured in adult ponds, and young fry should be cultured in standard groups. In order to prevent fish of different specifications from competing for food, there has been an extreme problem that the strong are stronger and the weak are weaker.
Trapping fish ponds and reasonable close planting of various fish species are important measures to make full use of water area, make rational use of feed, give play to production potential and improve fish yield. Based on the feeding habits and living habits of various fishes. According to the living habits of fish, relatively speaking, pelagic fish can be divided into pelagic fish (grass carp) and pelagic fish (carp and crucian carp). According to their feeding habits, they can be divided into fat fish (mackerel plankton, mackerel plankton), herbivorous fish (grass and mackerel), omnivorous fish (carp, crucian carp, tilapia) and carnivorous fish (catfish, catfish, catfish, etc.). ). It can not only play a supplementary role, but also strengthen the purification function of water and maximize profits. Well-grown algae can obviously buffer and decompose PH value, ammonia nitrogen, nitrite, hydrogen sulfide and heavy metals. Can prevent the water quality index from falling sharply.
Shrimp needs to be peeled frequently, so a safe environment is especially needed. Sunlight and transparent waters are not suitable. Fertilizer can not only improve turbidity and reduce transparency, but also prevent red tide, weaken solar radiation and slow down the change of water temperature. The safety and habitat of prawns are very important. Provide natural bait. Algae contain chlorophyll and can use the light and heat of the sun for photosynthesis. It is also important to provide natural bait for the healthy growth of shrimp. However, flying water also has a certain "disadvantage" ending. Yang deficiency at night. Fat water increases oxygen consumption at night, and it is easy to lack oxygen at night. Fat and water are better than water without fat.