Autumn fishery production management technology

Autumn is the key season for aquaculture production management. If you are careless, it will cause major losses and even lose out.
The autumn climate is characterized by: early autumn: the temperature is still maintained during the summer high temperatures, but the night is cooler, the light shines, and the monsoon is high. In some years, the “Autumn Tiger” will last for a period of time, causing multiple thunderstorms at the junction of summer and autumn. Relatively large, sweltering weather can easily degrade water quality and lack oxygen at the bottom. Mid-Autumn Festival: The autumn season is moderate, and the air temperature is moderate. It is the most suitable period for aquaculture animals to grow. It is the best time for all kinds of breeding animals to increase their weight gain. However, accidental hot weather can easily lead to severe hypoxia and pan-blood. Pool death accident. Late autumn: With cold air coming, temperatures falling, and sunny days mostly suitable for aquatic animal breeding, but after the water temperature drops, various types of pathogens in the water body also breed. Rapid decomposition of underwater sediments in oxygen-rich conditions can cause excess nutrients in water bodies. It breeds large amounts of algae, forms stinky green water, and at the same time breeds pathogens. The disease will be broken out with the disease. It is commonly known as “Bai Lu Xin” and is a stage of high incidence of diseases. In addition, tropical breeding animals such as prawns and Macrobrachium rosenbergii are exposed to cold air, and preparations for the market and measures for keeping warm and cold are required.
In light of the above situation, the focus of aquaculture management in the fall should be as follows:
First, improve water quality With the growth of farmed animals, the relative density of ponds increases, water baits, excreta, old leaves of aquatic plants spoil, will consume a lot of oxygen, but also produce toxic gases such as h2s, biogas, ammonia nitrogen accumulation increased , Ph value drop, can easily cause floating head pan pool. Therefore, one must add water (change water) in time, increase the pond water level to the highest, and increase the volume of the pond water. The water must be added between 9:00 am and 2:00 pm. After a small number of times, the upper and middle layers of water must be absorbed to increase plankton species. , Make plankton in the pond reach the balance of the population, prevent and reduce the breeding of blue-green algae to form “blue lake water”; second, use microbial preparations such as bacillus, photosynthetic bacteria, nitrifying bacteria, and em fungus to regulate water quality and reduce Nitrite, ammonia nitrogen, hydrogen sulphide, and ph values ​​are too high to cause damage to water bodies. The number of crabs crawling on the shore in autumn increased, and the foam in the mouth was caused by the lack of oxygen in the water. The water should be changed immediately and the amount of water changed. Every 10 days or so, lime is splashed with a dosage of 5 to 7.5 kg per mu (1m deep), which can increase the calcium content of the pool water and maintain the ph value of the pool water at 7.5~8. This is beneficial to the thickening and hardening of the crab shell. Promote healthy growth.
Second, to strengthen the feeding management First, we still need to adhere to the timing, positioning, feed requirements of good quality, comprehensive nutrition;
Second, we must increase the proportion of feedstuffs and promote fattening;
Third, we must appropriately increase the amount of feeding, extend the time to eat, eat 3 hours is appropriate.
In addition, autumn is the peak period for river crabs to ingest aquatic plants and snails. It is necessary to pay close attention to ensure that crabs are used for food and eat, but also have a high amount of ponds. Insufficient ponds should take measures to make up water plants and snails.
Third, diligent patrol ponds adhere to the morning and evening patrol ponds each day to check the activities of fish, shrimps, crabs and eating conditions, check the water color, transparency, and ph value, and timely remove the rot grass, residual baits, and disinfect the food field. For river crabs, soft-shelled turtles and other easy-to-escape aquaculture species, pay attention to see if there are any loopholes in the anti-escape setting and pools, check the inlet and outlet anti-escape facilities, and strengthen anti-theft inspections at night.
Fourth, pay attention to disease prevention in the fall of all kinds of diseases will occur, especially poor water quality, reduced water plants ponds, crayfish crayfish disease, parasitic parasitic fish, Chinese sturgeon and other Parasitic Diseases, shrimp and crab black lice disease, fish Bacterial gills, print diseases, and bleeding disorders can be massively outbreaks, so it is important to carry out a targeted disease prevention process.
The method: 1 first fill the water to kill parasites, shrimp and crab nets with fibrils, fish, such as trichlorfon and other drugs according to the instructions Quanchiposa once. 2 The next day use chlorine preparation Quanchiposa; three 3 days with quicklime 5-10kg/mu. Rice water Quanchiposa.
V. Timely marketed aquaculture products can reach the market for listing, capture large and small, reduce the relative density. According to the market demand and the arrangement of sales time for aquatic products in the surrounding areas, it is better to stagger the time-to-market for higher economic benefits. In addition, the amount of fish (shrimp) contained in ponds and the temperature of catching water should be taken into consideration when listing on time and progress.

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Preparation. 

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