The countermeasures for the breeding of white shrimp in South America

(1) Water source filtration and storage system Water source filtration is the first step to prevent the occurrence of diseases, and it is also the most urgent part of the system. A "well-type" or "tank-type" filtration treatment and storage system should be adopted according to the natural conditions of the selected shrimp farm and its beach. (2) Intensive reconstruction of aging shrimp ponds: Although there are about 200,000 hectares (3 million mu) of shrimp farming ponds in China, the yield of shrimp farming in China is very low. The current annual production is less than 200,000 tons, and it is used as shrimp. The beach resources developed by the pool, like other resources, are also very limited. We cannot expect to develop beautiful beaches as shrimp ponds to raise shrimp. The key to the next step in the development of shrimp aquaculture is to increase yields and benefits. Therefore, we must make great efforts to transform our “ageing shrimp pond”, that is, to implement an intensive transformation of the aging shrimp ponds. Through intensive transformation, the average yield per unit will be doubled, and only southern China can achieve the highest historical yield of shrimp in China (200,000). Ton). It can be seen that the intensification of aging shrimp ponds is very promising. Substrate pollution and aging are one of the most important factors affecting the success or failure of shrimp pond culture. The application of a high standard membrane bottom pond can fundamentally solve the problem of sediment pollution and aging in shrimp ponds. The key to its design is that, whether it is a pond of any sediment, it should be covered with smooth and clean plastic film. The second key to the design of a high-standard pond is the construction of a central sewerage system and a pipeline into the drainage system. Intensive shrimp aquaculture ponds must be equipped with a large number of aerators. Under the action of the aerators to agitate the water stream, the shrimp ponds' contaminants (residues and excrement) can be concentrated at the center of the shrimp ponds, and then the sewage can be set in the ponds. Pipe out of the pool. Therefore, the establishment of a central sewerage system can achieve shrimp ponds at any time to discharge sewage, thus ensuring the quality of shrimp ponds. Into the drainage system, especially the influent organizations at all levels to appeal to the pipeline can prevent the breeding of harmful algae and debris through the channel into the shrimp pond, is conducive to disease prevention. (3) Disease control and aquaculture environment restoration: The epidemic of shrimp disease has brought huge economic losses to the shrimp industry. Therefore, although the culture of P. vannamei has not yet seen major diseases, it is still necessary to prevent the disease. Not yet. Due to the abuse of antibiotic drugs, serious consequences have also been brought about and the aquaculture ecosystem has been destroyed. With the entry of the WTO, the inspection of shrimp products at home and abroad will become increasingly stringent. Therefore, we must pay great attention to it. For the control of prawn diseases, “prevention is the main” can not only stay on the verbal, must strictly limit the use of related antibiotics and other chemical drugs, aquaculture wastewater management, effective breeding of the ecological environment in order to ensure the sustainable and healthy development of the shrimp aquaculture industry . A. Shrimp management technology using the seawater prevention and disease prevention shrimp culture system to manage shrimp management technology: The health status and sickness of shrimp seedlings is one of the keys to the success of breeding. Therefore, in the selection of shrimps, the shrimp seedlings cultivated by the method of healthy seedlings should first be selected. At the same time, the virus-associated conditions should also be tested to ensure that the stocked shrimps are robust and disease-free. Due to the shrimp virus, especially the white spot virus that causes the large-scale outbreak of shrimp death, mainly through the water source, mainly the use of Chinese herbal medicine and other environmentally friendly drugs for treatment. B. prawn quality management techniques: Although high yield is the main objective of this technology, this technology does not mean unilaterally pursuing high yields. Instead, it regards quality as the primary goal to be pursued by the technology and is based on the specific circumstances of shrimp ponds. Find the best combination of yield and benefit. In the aspect of quality management of shrimp, first of all, according to the needs of the international market, produce large-size shrimps that meet the international market standards. At the same time, we will focus on the adoption of clean production processes throughout the farming process, the production of shrimp in accordance with the requirements of green food, and the selection of high-quality nutritionally balanced feeds that meet the growth of white shrimp. (4) The use of microecological agents in aquaculture processes Microecological agents are also called "beneficial microorganisms" and "probiotics". Commonly used products include nitrification and denitrifying bacteria, Lactobacilli, Bacillus subtilis, and Bifidobacteria. Pseudomonas, yeast, coccus, etc., were first used in China's aquaculture photosynthetic bacteria PSB, after several years of practice, the scope of use has been quite extensive, and used as a routine measure. In recent years, some multi-functional microbial preparations imported from abroad and newly developed in China have been used in aquaculture. The use of “Epicin” to optimize the culture environment and the bottom of organic decontamination bacteria decontamination pools in shrimp ponds have also been achieved. The obvious effect is that the mechanism of action of microecological agents is to form dominant populations, compete with pathogenic bacteria for niche, inhibit the reproduction of harmful bacteria, absorb and use ammonia nitrogen in water and other substances, improve breeding environment, and produce organic pollution during biodegradation culture. Substances, converted to CO2, inorganic salts, etc.; improve the body's metabolism, activate the immune system, improve animal immunity; microorganisms can promote the absorption of the digestive tract of animals, and can form biological groups in the water, increase the amount of basic food, to promote the cultivation of animals The purpose of growth: Long-term aquaculture residues, such as baits and excreta, cause organic self-pollution in the bottom of the farm site and the ecological environment is severely damaged, and ecological restoration is required.Microorganisms reproduce rapidly, adapt to the environment, and have obvious effects. And mechanical cleaning, chemical drug treatment and other measures Simple operation, saving manpower and material resources, no drug residues and other side effects, is an excellent green product, especially suitable for use in aquaculture water environment.As a big country of aquaculture, China's aquaculture area and output rank first in the world, and clean culture and extensive use should be advocated. (5) Immunization and biotechnology research: As a result of the large-scale use of antibiotics in the aquaculture industry, including shrimp farming, the environmental pollution of water bodies is serious, and on the other hand, the aquaculture animals’ own immunity is reduced, causing disease. Occurrence: The state now clearly stipulates the prohibition of the use of antibiotics, so how to develop green feed additives and thus enhance the immune and disease resistance of fish and shrimp is the focus of current research, and we are also conducting research and development in this area. Technical research is also indispensable, but currently there are few reports on domestic research institutes.

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