June and July are the key periods for aquaculture production. This period of time is accompanied by a continuous increase in temperature and water temperature, and increased rainfall. Fish , shrimps, crabs, clams, shellfish and other aquatic animals thrive in appetite and enter a period of rapid growth. This period is also a period of time when climate change is erratic and many unfavorable factors are concentrated. For example, during the rainy season, the feed is susceptible to deteriorating, thunderstorms are more, climate change is large, and high-temperature and low-pressure sultry weather are easily formed. Slight negligence will lead to deterioration of water quality, outbreaks and epidemics. To this end, some suggestions on the characteristics of aquaculture during this period and the key issues that should be noted are provided for farmers' reference. First, the freshwater fish breeding 1, seed cultivation period management: June is the incubation period of certain fish species, should be based on the growth of the situation in time to pond sparse or the sale of summer flower seedlings, control of breeding density. Before entering breeding stocks, the disinfection of clear ponds should be done well before stocking, seedlings must be sterilized with salt water or potassium permanganate before entering the pool before they are stocked, and seedlings purchased from other places must be quarantined. Infected areas to avoid seeding bacteria. 2, adult fish breeding management: (1) water quality control. During this period, the food intake of fish increases, and the increase in excreta can easily lead to deterioration of water quality, resulting in lack of oxygen. Therefore, aerators need to be oxygenated in time every day depending on the weather, water quality, etc. In the event of showers or hot weather, the oxygen aeration time should be extended. It is necessary to constantly add new water, keep increasing the water level, and replace some of the bottom water properly. (2) Do a good job of disease prevention. In June, the real high-temperature summer season has not yet entered, and the temperature is more suitable for breeding and breeding of various pathogens in the water, which is the season for susceptible fishes. The major diseases that are prone to be outbreaks during this period are watery mildew, putrefaction, rotten gill disease, enteritis disease, hemorrhage, small echinococcosis, trichodiasis, and myxosporidiosis. Attention should be paid to the prevention of various types of fish diseases. Regular use of lime, chlorine dioxide, dibromohydantoin to disinfect or use microecological agents to improve water quality. (3) Strengthen day-to-day management and stick to duty on duty. As the weather changes in June, we must pay close attention to the observation of fish eating and behavior, especially in thunderstorms or hot weather. Oxygen deficiency warning signs (fish floating heads) should be promptly injected with new water and aerators should be opened to avoid pan fish dead fish. Second, the crustacean culture 1, Macrobrachium rosenbergii and white shrimp farming in South America: In June, all kinds of shrimp have been basically stocked, and gradually into the shrimp farming stage. During this time, feed as much as possible to feed the shrimp. June is a critical period for the cultivation of white shrimps in South America. It is prone to diseases such as leukoplakia, red body disease (torah disease), red leg disease, and black shank disease. It belongs to viral diseases or bacterial diseases and is cultivated in culture. Should be the focus of prevention. The daily management should adopt comprehensive prevention and control measures to strengthen water quality monitoring, strictly control the amount of feeding, attach importance to the detection of the disease, and take emergency measures in case of anomalies. New micro-ecological agents (such as U.S. AA ecology) are very effective in the cultivation of white shrimp in South America. Green shrimp generally pay attention to water quality management, and it rarely occurs. It is mainly prevention. 2. Crab farming: In June, crabs have been stocked for several months. They should carefully regulate water quality and feed scientifically. The water surface should be timely transplanted with water peanuts or leeches and other shaded plants, and underwater plants should be planted with submerged algae such as Hymenocallis fulva and Vallisneria, so as to create a good ecological environment for the inhabitable growth of crabs. This season is also a period of frequent occurrence of disease in river crabs. The main diseases are trembling disease, scrofula syndrome, and ciliated ciliate disease. We must adhere to the principle of giving priority to ecological prevention and supplementing with drug control. The usual disinfection is mainly lime, bromochlorohydantoin, etc., or regular use of microecological agents for comprehensive regulation to maintain the microecological balance in crab ponds. Third, the breeding of amphibians / reptiles culture turtle (cockroach). In June, there will be a large number of juveniles hatching, one to collect and hatch in time, and the other to strengthen the intensive cultivation and disease prevention of juveniles. Before entering the pool, juveniles must be sterilized by a medicinal bath to prevent germ infection. When purchasing foreign products in foreign countries, inspection and quarantine shall be strengthened and strict elimination shall be implemented. As the temperature of greenhouse-raised soft-shelled turtles rises significantly, it is necessary to pay attention to ventilation and ventilation, strengthen the regulation of water quality, and rational feed feeding. In June and July, the most common diseases of the soft-shelled turtle are tofu pierced disease, red floor disease, white floor disease, red neck disease, and acne disease. The perforation of perforated skin is more prominent, and preventive measures should be taken actively. The turtles are basically bred with turtles. Fourth, the breeding of shellfish in June is the breeding season of spiny bream, should be timely to do the breeding of leeches and seedling cultivation. At this time farmers can purchase seedlings for grading according to their own needs. June is the main season for pearl aquaculture. Fertilizer should be applied promptly to cultivate good water quality. Quicklime should be applied regularly to adjust the pH of the water body. At the same time, we must strengthen the prevention of diseases. The main diseases of river rafts include rotten gill disease, menopausal ulcers, and rotten axe. The prevention and treatment of different symptoms should be conducted in time. V. Application of Microecological Preparations Microecological preparations are a new technology that has become popular in the world in recent years. Its principle is to foster known microbial populations that are beneficial to fish and shrimp, and to create a favorable ecological environment for fish and shrimp. , improve the water quality of aquaculture waters. Therefore, the micro-ecological preparations are green, economical and highly efficient. Their promotion and use in the aquaculture industry is highly valued by agricultural experts and government agencies in various countries. And in terms of function, microecological agents have also been continuously improved, from light and bacteria that only improve water quality to multifunctional EM bacteria, probiotics, and now fully functional microecological agents (such as AA water-producing agents). At the same time, it has many functions such as improving water quality, promoting the growth of fish and shrimps, and improving the resistance of fish and shrimp. When purchasing such products, you should pay attention to whether the product has a formal approval number or manufacturer's address to avoid loss. In addition, it is worth mentioning that the microecological preparations that need to be used after fermentation are proliferated. Although it is convenient to use products that are not directly applied, the effective substances are greatly increased after the proliferation of the fermentation, so they are more economical and the effects are also better than the latter. During the Meiyu period, it is best to apply the microecological preparation once every few days. The entire pool is sprayed evenly, which can effectively decompose the organic matter in the pool, reduce harmful substances, stop the propagation of germs, maintain good water quality, and have a better long-term adherence effect.
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