The arrival of typhoon-prone season, shrimp culture still needs to be cautious

I. So far, the impact of typhoon on white shrimp farming in South China has been relatively small. This year, the South American white shrimp culture in South China has been plagued with severe impacts, such as the "cold winter," mixed seed market, persistent high temperatures, rainy weather, and "stolen deaths." As a result, the overall output of white shrimp this year has been reduced by 40-50% this year. However, as of now, the typhoon has not caused too much impact on white shrimp aquaculture in southern China. In the second half of July, “Conson” and “Chandu” hit one after another, but most farmers were at the time before the typhoon approached. The finished shrimp was caught and listed, so it did not cause significant economic losses.

2. Tropical Cyclones have become active, affecting shrimp culture in South China and East China. According to the forecast of the Central Meteorological Observatory, after nearly a month of calm, tropical cyclone activity has been active in various sea areas recently, and the “tropical system” strikes, currently in the Western Pacific. There are three tropical system activities, namely the "Compasse", "Lion Mountain" and tropical depressions in the southern part of the East China Sea, and the three tropical systems interact with each other. The future movement path is extremely complicated. It is estimated that due to the combined effects of "Lion Rock Mountain", "Compasse" and the tropical low pressure over the East China Sea, today, during the day and night, parts of Guangdong East Central, Eastern and Southern Fujian, eastern Zhejiang, Shanghai, eastern Jiangsu, Shandong Peninsula and Taiwan will appear. 100 ~ 240 mm, local up to 250 ~ 400 mm heavy rainfall.

This year’s No. 7 Strong Tropical Storm “The Compass” was strengthened into a typhoon at 17 o'clock on the 30th. It is expected that the strength of the “compasses” will continue to increase and will enter the southern sea of ​​the East China Sea during the day on September 1, and then gradually move to the central part of Zhejiang Province to central Jiangsu. Near the coast. The next few days will affect shrimp farming in Jiangsu and Zhejiang.

Third, the recent status of shrimp farming in South China At present, most of the shrimp ponds in South China are freshly-reprodious shrimps, and finished shrimps have gradually emerged from the pond. This is a stage where the yellow and the yellow are not connected. Therefore, the price of shrimp has always been on a rising trend. There are 40 shrimp per kg in South China. Tang head price is about 14 yuan / kg. Affected by the rainy weather in the past month, shrimp farming in parts of Zhanjiang and some parts of the Pearl River Delta is still not ideal, but some active farmers can still breed successfully.

Fourth, coping with multiple typhoons, experts support the typhoon-prone season should try to maintain a certain degree of water in the pool, more fertilizer in the case of northerly weather, heavy rain and other conditions are not easy to change, the weather is relatively stable, the relative stability of the water can be reduced The stress of shrimp will reduce the incidence of disease. It will also improve the quality of sediments and reduce the oxygen consumption of ponds in rainy weather. In addition, it is also important to strengthen the internal administration of nutrients and strengthen the disease resistance of shrimp. Finished shrimp ponds may be considered first to catch a portion of the shrimp market to reduce the risk of breeding.

Before the typhoon, the pond foundation should be reinforced, and vitamin C, immune polysaccharides and other anti-stress drugs should be splashed. It is best to have oxygen scavenger at home to prepare for use during a power outage caused by heavy storms; typhoons should be appropriately reduced before and after the typhoon and stopped at the rain. At the same time, there should be more patrol ponds to observe changes in ponds and take appropriate first-aid measures as soon as possible.

After the typhoon, equipment should be inspected and repaired in time to assess losses, observe shrimp movement and food intake, and identify problems as early as possible to minimize losses. Disposal, detoxification, and cultivation of bacteria and fertilizers should be properly handled according to pond water quality.

In general, weather changes are still one of the important factors that dominate the current shrimp farming, especially the impact of typhoons can not be overlooked, but the facts also prove that the adoption of appropriate preventive measures can reduce the impact of typhoon on shrimp farming. Prevention is the best measure to survive the typhoon-prone season. In this year's good shrimp prices, I sincerely hope that the majority of farmers breeding smoothly.