In the culture process of Penaeus vannamei, there is often such a situation: the rainy days are normal, and the onset of fulminant disease occurs two or three days after the rainy weather turns fine. Continuous rainy days will cause algae aging and sinking in the water body. The dissolved oxygen in the water body will be insufficient and the dead algae will decompose at the bottom of the pond. This will not only reduce the dissolved oxygen in the bottom water, but also release toxins. At the bottom, anaerobic fermentation breeds a variety of toxic and harmful substances and harmful bacteria. At the bottom, a layer of poisonous layer is formed at a position of 30 cm to 50 cm. This poisonous layer is like a time bomb. After the weather is clear, the entire body of water is circulated along with the water circulation. After continuous rainy days, the shrimps have relatively poor vigor, which makes them vulnerable to fulminant diseases after the weather turns fine. At 23:00 on June 12, Typhoon Miaobai Center landed on the coast of Dapeng Peninsula in Shenzhen, Guangdong Province. The maximum wind strength near the center was 9. Although the typhoon has already passed, the heavy rainfall brought about by the weather continues. The harsh weather has brought great impact on shrimp. Summer is an important period for the cultivation of white shrimps in South America. Frequent rainy weather has caused great problems for the farmers, especially the rain stress and outbreaks after the rain, which directly affect the aquaculture production, which is related to the success of breeding for one year. Therefore, it is very important to do pre-rain prevention and timely processing after rain and rain. Local heavy rain flushed acidic substances into the pool, raising the pool water (especially suggesting a greater impact on the first generation of seedling culture and earthen ponds) and drastically reducing the pH of the pool water; the rain caused the pool water layer and caused the bottom to lack of oxygen, causing the death of algae and fish and shrimp; At the time, anaerobic reactions occur at the bottom of the pool and many toxins are produced. During rainfall, shrimps need to adapt to changes in salinity to regulate osmotic pressure in the body, requiring a large amount of energy to be consumed by the body. If there is insufficient energy, severe stress responses will occur; Rainfall causes changes in the salinity of water bodies, which can lead to severe stress-induced husks, soft shells, or dehulled shells. Rainwater flushes turbid water into the pool, which can make the pool water turbid and prone to yellow and black pods. This is also the result of heavy rain that causes death. The main reason is that if it happens, the effect of first aid is poor, and it is recommended that the prevention and control of the early stage should be the priority. Pre-rain treatment (1) Pay attention to changes in wind direction, and pay attention to weather forecasts 200 km away from the direction of the wind (accurately two or three days ahead of the local weather forecast). (2) Pay attention to the pond trimming to prevent damage caused by rainstorms dynamiting dams and sluice gates; at the same time, inspect and repair oxygen generators, motors, lines, and pipelines in preparation for emergencies. (3) Acid rain or acidic soil areas can be sprinkled with some quicklime around the walls of the pool to prevent rainwater from flushing acid into the pool, causing the pH of the pool water to drastically drop. (4) One week before the rain, pay attention to the internal medicine of the shrimp (such as herbal or gold) and nutrition trace elements (stress nutrients or life No. 1 internal and external use). (5) Three days and four days before the rain, we must pay attention to aeration and use biological products to change the bottom so as to avoid heavy rain at the bottom; (6) Two or three days before the rain, appropriate control of the amount of material (decrease without reducing the weight of meals, reducing the amount of one meal by up to 30%, or 40%) reduces the load of feed protein on the liver; at the same time, it can be mixed with Lactobacillus acidophilus to raise the intestine. Mucosal disease resistance, help digestion, bacteria inhibition, reduce digestion pressure. Rain treatment (1) The pool moisture layer must be prevented during rainfall, and the aerator should be started immediately regardless of the rainfall. It not only increases oxygen, but also accelerates surface rainwater mixing with the pool water, avoiding the formation of freshwater and warm layers, resulting in oxygen deprivation and algae death. (2) During torrential rains, anaerobic reactions occur at the bottom of the pool, resulting in many toxins that can spill particles of oxygen. (3) Control of the material during the rain can not stop the material, but also need to add some anti-emergency nutrients and functional products (external splash and internal). Post-rain control (1) After the rain can be used to strengthen the calcium supplement + baking soda water spill to relieve the stress of the shell, the water hardness test about 120 best. (2) After the rain, the pH of the water body must be detected immediately. (The drop in pH will result in a decrease in the rate of dissolved oxygen in the blood of the shrimp, causing hypoxia or liver disease.) For example, pH ≤ 8.0, adjust with hydrated lime. (3) If the rainfall causes serious stress to the shrimp, it will splash the living water spirit immediately after the rain. (4) Use organic detoxification products to ease the effects of toxins on water bodies and shrimps after clearing. (5) The use of adsorptive inorganic substances (such as zeolite powder) for the turbidity of the water body due to the heavy rain will cause aeration (3 o'clock in the morning is the minimum value of water capacity). The next day, the live bacteria product will be used again. No spores oxygen-consuming bacteria. (6) Rainstorm stress will reduce the disease resistance of shrimp, so after the rain, there are often outbreaks of shrimp (red legs, enteritis, jaundice, brown spots, etc.) and viruses (white spot, yellow head, hepato-pancreatic necrosis, etc.). It can be used for continuous disinfection with povidone iodine after rain and internal Chinese medicine Jin Fang + Herbal Medicine. (7) After the rain, it is necessary to pay attention to the control of the material and observe the situation of the shrimp; try to feed high-quality feed and add nutritive life No. 1 products to enhance the vitality of the organism. The rainy season has indeed caused a lot of trouble for the cultivation of white shrimps in South America. However, it does preventive and post-rain treatment, stabilizes water quality, pays attention to supplementing immune polysaccharides and vitamins after heavy rains, and controls the environment and nutrition to ensure survival. rate. We are a professional Chinese manufacturer of Plants Peptides; we supply various products of Plants Peptides, and can providing product images and basic parameters with each Oligopeptides Powder and Polypeptide Powder. We have the perfect after-sales service and technical support. Please do not hesitate to contact us, Look forward to your cooperation! 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