One, long-term without clearing the pool. There are cases where unclear pools have been successful in the production of shrimps. Therefore, some shrimp farmers have had the trouble to save time and save money without clearing the pond. This has often caused serious consequences. The main purpose of Qingchi is to remove toxic substances such as aging black mud deposited in the pool for many years; remove harmful bacteria, viruses, microorganisms, parasites and other harmful organisms in the pool, so as to provide a suitable, safe and comfortable culture environment for shrimp. Second, it is believed that the yield of shrimp seedlings is high. From the practice of shrimp farming, it can be seen that regardless of the intensive or extensive culture, if the density of seedlings at the pond is too high, it will lead to small, slow growth, early onset, and low yield. The distribution density of shrimp seedlings is related to various factors such as pool conditions, water quality, feed, and management. To make shrimp safety factor, survival rate is high, put Miaoning less not much, it is recommended to stock more than 1 cm of shrimp seedlings, intensive breeding ponds 2-25 million per acre, crude pools 4000-5000 per mu is the best . Third, that fresh material is better than with food. The production rate of shrimp with fresh materials is faster than that with food, so it is unscientific to think that feeding fresh products is good. The fresh material sometimes contains bacteria, viruses, parasites, etc., can directly infect the shrimp body, so that the incidence of shrimp increased; fresh material pollution of water quality, especially in the case of less water change, serious damage to water quality; fresh material is better with food nutrition Comprehensively, there are medicines to prevent diseases due to foods. Fourth, think that the effect of disease prevention or not. There are many shrimp farmers who believe that shrimp should be onset sooner or later. Medication can only increase costs. Indeed, for fulminant shrimp disease, it is true that there is no definitive drug. However, through scientific and rational drug prevention, the incidence rate can be reduced and shrimp farming can succeed. Disease prevention is a systematic project that cannot be accomplished overnight. It is necessary to start from every aspect of production and link each other. We should focus on pool water disinfection and bait-feeding procedures. We must not attempt to save labor and save money, resulting in a loss of shrimp production. Fifth, whether the water quality regulation is the same or not. The key to raising shrimp is to raise water, and the key to raising water is artificial regulation. Water is a necessary condition for the survival of shrimp. At present, there are still a number of shrimp farmers who are still not in line with actual conditions and are still in large water bodies. This will inevitably cause stress response in the shrimp body and lead to the death of shrimp. The water environment of shrimp farming must be stable. For ponds of a certain size, it is appropriate to change the depth of the shrimp in the early and middle stages of shrimp farming to 5-6 cm per day, and it may be increased in the later period. Sixth, think that the application of photosynthetic bacteria is the same. Changes in water quality in shrimp ponds are usually caused by changes in sediment quality. Changing water can only improve pool water, but it cannot improve sediment quality and eliminate root causes of harmful substances. Photosynthetic bacteria can use organic substances, ammonia, and hydrogen sulfide that remain in the water and bottom sludge. Especially when the bottom layer is oxidized and the organic contaminants are reduced, photosynthetic bacteria activity becomes more intense. In the case of not changing the water, to maintain a good water quality environment, photosynthetic bacteria can be applied. Photosynthetic bacteria can play a role in attacking bacteria and inhibiting harmful bacteria with beneficial bacteria.
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