High-temperature season to maintain good shrimp should do four

In summer, the sunshine is strong, the temperature is high, and the water quality is poor, which affects the feeding and molting of shrimp, and it is also easy to cause death. According to the practice experience of Liang Chunlin, Yan Youbin, etc., who are located at the junction of Huanghai and Pucheng in Dalian, and do a good job in the management and management of shrimp, it is necessary to do four things: 1. With water temperature and oxygen, the water temperature increases and In the growth of shrimp, it is necessary to continuously increase the water depth, especially in the middle and later stages of aquaculture, the water level must be increased to 1.8 to 2 m, and the high temperature period should be kept above 2.2 m. For this reason, in the tide period, it is necessary to maintain a daily change of water; in the low tide and dry season, mechanical irrigation and drainage should be carried out so that the amount of water changed per day is about 50%. In the high temperature period, the whole row should be fully filled, so that the water temperature can be effectively controlled below 30° C., so that the transparency of the water can reach 35 cm, and the dissolved oxygen level can be stabilized at about 5 mg/L, which is conducive to fast food, high quality and high yield. When changing the water, it is best to prevent the intrusion of microbes that carry the shrimp fulminant virus. It is best to filter the water at the inlet with a 60 mesh mesh. 2 To stage the feeding when the prawn body length is more than 4cm, feed on low-value shellfish such as snails and clams, feeding 6-8kg per day per 10,000 fish; when the prawn grows 8cm, tens of thousands per day Tail feed 50kg; when the shrimp is 12cm in length, feed 100kg per 10,000 fish per day. If the shellfish food is not enough, can be fed with food, when the shrimp body length of 4cm or more, feed 1.5kg every 10000 feedings per day, after the shrimp body length every 0.5cm increase, every day 10000 feeding feeding 0.3 to 0.5 Kg; prawn body length of 10cm or more, feed every day more than 10,000 fish feed 0.7 ~ 0.8kg. If chilled small fish is used, then replace it with 2.5kg of chilled fresh fish mixed with 1kg of mixed bait. Prawns have nocturnal habits, frequent activities at night, strong appetite, and latent days, reduced appetite. Therefore, the bait should be fed twice before sunrise and after sunset, with 1/3 in the morning and 2/3 in the evening. The bait should be put on the platform around the shrimp pond so that all shrimp can be eaten. When baiting, it is necessary to adhere to the principle of "Four more than four and more than two". "Four or more than four," that is, shrimp less before the growth of the early stage, more than the late vote; less vote in the morning, late in the evening to vote; less investment at low tide, when the tide more vote; shrimp a lot less when the skin cast, normal growth and more cast. "Two don't cast"; that is, the bad food does not cast, ditch and deep water do not cast. In this way scientific materials can be used to effectively increase the utilization of bait. 3 We must guard against the occurrence of high-season shrimp disease, poor shrimp feeding activities, the body's metabolic levels decline, coupled with deterioration of the water environment, pathogenic organisms breed, can easily lead to the occurrence of shrimp disease; Therefore, we must effectively do a good job prevention and treatment of shrimp disease. First of all, pay attention to the amount of feed should not be too much and too concentrated, so as not to change the smell of food odor, resulting in water pollution, especially fresh live bait, high temperature, easily degenerate, should control the amount of feed, so as not to cause death of shrimp poisoning. To reduce water pollution in shrimp ponds, frequent water changes are required. Second, pay attention to grooming. Shrimp pond stocking density is high, it is easy to cause pan shrimp pond. Therefore, in the hot season, it is necessary to reasonably adjust the density of the shrimp population to maintain a certain active water area for the shrimp. 4 To prevent floating heads of prawns from dying during the high temperature season, they should adhere to the morning and evening patrols on a daily basis to observe the growth activities of the prawns and the survival of the bait and determine the type and amount of bait on the day. When prawns are heavily crushed, some high-protein diets should be added to prevent mutual food. Before midnight and before dawn, the lowest point of oxygen in the shrimp pond water is the most dangerous time for shrimp to suffer death from floating head, such as the discovery of prawns, white shrimp floating head and small trash fish gathering to the pond edge (this is the symptom of shrimp floating). It is necessary to start the aerator or change the water in time to increase the dissolved oxygen in the shrimp pond water. At the same time, we must also pay attention to the removal of silt and debris from the shrimp ponds to ensure that the water in the shrimp ponds is fresh and good, so as to prevent the shrimps from dying.