Experience in management of pond fish culture in summer

Summer is the most vigorous season for fish growth, but also the outbreak peak period of various fish diseases. At this time, the quality of feeding management is directly related to the level of fish production and economic benefits. Therefore, we must strictly do a good job in the daily management of fish ponds.

1. Patrol the pond frequently and pay attention to prevent floating head. Every day, we should insist on patrolling the pond three times in the morning, middle and evening. In the morning, patrol the pond before sunrise to observe whether there is floating head around the fish pond and the degree of floating head. At noon, the main inspection of fish feeding and water color, to determine whether the feeding and fertilization amount is appropriate. In the evening, check whether there is residual feed and whether there is a sign of floating head or when floating head has occurred, take aerobic measures immediately, such as injecting a large amount of new water or opening an aerator for oxygenation. 2. Pay attention to regulating water quality and do a good job in drainage and irrigation of pond water. In addition to correct fertilization and feeding, fish ponds with thick water color should be frequently injected with new water to keep the water fresh, generally every 7-10 days, and each time the water is added to a depth of 15-20cm. Check and repair the water inlet and drain regularly, keep the water flow unblocked, prevent collapse and blockage, and strictly check in rainstorm season to prevent water overflow and fish escape. In the season of farmland application, pay close attention to the application of drugs in surrounding farmland, understand the direction of farmland drainage, and strictly prevent farmland drainage with pesticides from entering fish ponds. 3. Pay attention to strengthening bait feeding. Food should be fresh and palatable. Feeding should not be more or less, adhere to the principle of four look, there are plans to feed all kinds of bait, feeding times required twice a day. Feed to cast within half an hour to eat up for the degree, feed requirements comprehensive nutrition and sufficient, while paying attention to fine and coarse collocation, feeding requirements fixed point feeding. Reduce bait dosage on cloudy and rainy days or when the water color is thick and transparent. Less or no rain before and after. Remove the leftover bait and grass every day to avoid polluting the water quality. 4, reasonable fertilization, maintain appropriate fertility. The principle of fertilization is to use a small amount for many times, observe the water color, control the amount of topdressing according to the fertility of the water, generally require the transparency of the water body to be about 30cm, and the water color is best with tea brown. From June to September, 5-6kg of yeast bio-organic fertilizer can be applied per mu, 3-4 times a month; the fertilization time is selected in the morning of sunny days, and the water is evenly sprinkled. 5. Do a good job in comprehensive disease prevention. Drug prevention before fish disease epidemic season is one of the important measures to prevent fish disease. The concrete method: every month, 15- 20kg quicklime is used for one meter of water depth per mu, evenly sprinkled after water adjustment, and 100- 200g of strong chlorine essence and 90% crystal trichlorfon solution of 0.5ppm are alternately sprinkled in the whole pool for one meter of water depth per half month. At the same time, bleaching powder hanging basket and copper sulfate and ferrous sulfate mixture hanging bag are carried out in feed platform every month for one treatment course, and Chinese herbal medicine can also be inserted. Preventive medicine can be added to feed to make bait, feeding a course of treatment, there are good results. During the fish epidemic, nets, buckets and other fish farming tools should be disinfected to avoid mutual infection.