At present, the fish farming industry has gone to a low profit period, and the depressed market price has made the fish farming industry face a severe test. From now on, the aquaculture industry should start from cost savings and actively explore the expansion of profit margins. In the process of breeding, the cost of feed is the first factor, accounting for 60% to 70%. Cost savings must begin with science, efficiency, and savings in the use of feed. First, choose nutrient materials, a reasonable balance of good quality feed The quality of feed is directly related to the cost of breeding. The quality of feed is good. The fish can be digested and absorbed after eating. The fish grows fast and the feed coefficient is low. Conversely, farming fish with poor quality feed will greatly increase the cost of farming. Second, scientific and reasonable feeding is an effective way to reduce feed waste and control feed costs. Feeding should be based on the "four fixed" timing, fixed point, qualitative, quantitative principle, to achieve a uniform amount, to avoid excessive and less, resulting in over-satisfaction, indigestion, affecting the normal digestion and absorption of fish. The amount of feed should be determined based on water quality, weather, fish activity and food intake. In the amount of feeding, the fish are generally eaten to "eighty percent full", that is, 80% of the fish are full, and 20% of the fish are not very full; after 2 hours of feeding, the feed is basically eaten, with a little surplus, or There are also a few fish that swim to swim for food. This will maintain a strong appetite for fish and reduce feed losses. Reasonable determination of the number of feedings should be based on the feeding, growth and feeding strength of the fish. Reasonable feeding amount and frequency will help improve the digestibility of fish in feed, reduce the loss of feed in water, and reduce the feed coefficient. Properly master the feeding time and choose the feeding place. The feed table should be placed on the side of the lee of the pond, the water is deeper, the bottom is harder, less leaking, and more open. The feeding time and number of times are determined according to the species of the fish and the size of the food. Generally, the adult fish is fed in the morning and evening, and the two are fed on the The time is between 8 and 9 in the morning and 5 to 6 in the afternoon. Third, healthy water quality management Water quality management is very important. As the saying goes: "Three minutes, seven points." Pipe refers to water quality management. The quality of the pond has an important impact on the fish feed coefficient. Generally speaking, the water has no pollution, fresh water and sufficient dissolved oxygen. The fish has a large food intake, a strong appetite, high feed utilization rate, fast growth rate and small feed coefficient. Among the various physical and chemical factors of pond water quality, the dissolved oxygen content of water is the biggest influencing factor of feed. The dissolved oxygen in water is sufficient, the metabolism of fish body is strong, the digestion time of feed is greatly shortened, and the growth rate index of fish is increasing. The coefficient is negatively increasing. According to aquaculture experts, when the dissolved oxygen in water dropped from 7.6 mg/ton to 3.1 mg/ton, the feed coefficient increased by 5.6 times, while the growth rate decreased by 9-10 times. In addition, the fish feed consumption is proportional to the increase in water temperature over a range of water temperatures. The water temperature is within a certain range, and for every 1 °C increase, the feeding rate of fish of the same weight increases by 0.1% to 0.5%. Therefore, the same species of fish have different feeding rates at different water temperatures. Adjusting Relief Valve,Adjusting Exhaust Valve,Sanitary Exhaust Valve,Bidirectional Adjustable Breathing Valve Ningbo Wenhan Fluid Equipments Co., Ltd. , https://www.wenhanvalves.com