Farming fish to save feed

At present, the fish farming industry has moved towards a period of low profit, and the low market prices have made the fish farming industry face a severe test. From now on, the aquaculture industry must start from the cost savings and actively explore the expansion of profit margins. In the breeding process, feed costs account for the first element (about 60% to 70%). Cost savings must begin with scientific, effective, and saved use of feed. Here's a discussion of how to save feed. First, the choice of nutrients to reasonably balance the quality of good quality feed quality, is directly related to the cost of farming, feed quality is good, fish digestible after eating part of the high, fish growth speed, low feed coefficient. Conversely, raising fish from poor quality feeds will greatly increase the cost of farming. Second, scientific and rational feeding is an effective way to reduce feed wastage and control feed costs. Feeding and feeding should be based on the principles of “four settings” (timing, fixed-point, qualitative, and quantitative), so that uniform and adequate quantities can be avoided, avoiding frequent changes. Has caused hunger, indigestion, affect the normal digestion and absorption of fish. According to water quality, weather, fish activity, and feeding conditions, the amount of feed should be determined. In the feeding amount, the fish are generally controlled to eat "eighty full," that is, 80% of the fish are full, and 20% of the fish are not very full; after feeding for 2 hours, the feed basically finishes eating, leaving a little surplus, or There are also a few fish swimming around for food. This will maintain the appetite of the fish population and reduce feed loss. The reasonable number of feedings should be determined according to the fish's eating habits, growth status and feeding intensity. A reasonable amount and frequency of feeding will help improve the digestibility of fish feed, reduce the loss of feed in water, and reduce the feed coefficient. Properly grasp the feeding time and select the feeding place. The feed catering platform must have a deeper, harder (less leaky), and more open place on the side of the pond leeward. According to the species of fish, the size of food specifications to determine the feeding time and frequency. Normal adult fish are divided into two groups, morning and evening, 8 to 9 in the morning and 5 to 6 in the afternoon. Third, the health of water quality management Water quality management is very important, as the saying goes: "three minutes, seven points." Pipe refers to the water quality management, water is a pond fish. The quality of pond water quality has an important effect on the fish feed coefficient Generally speaking, water bodies with no pollution, fresh water and adequate dissolved oxygen have a large food intake, high appetite, high feed utilization rate, fast growth, and a low feed coefficient, but among various physicochemical factors in pond water quality, The dissolved oxygen content of the water body is the biggest influence factor of the feed, the water body has enough dissolved oxygen, the fish body growth metabolism is strong, the feed digestion time is greatly shortened, the growth rate index of the fish shows an increasing trend, and the feed coefficient shows a negative growth. After an expert experiment of aquaculture, When the amount of dissolved oxygen in the water drops from 7?6 mg/ton to 3?1 mg/ton, the feed coefficient increases by 5.6 times while the growth rate decreases by 9 to 10. In addition, within a certain range of water temperature, The consumption of fish feed is proportional to the increase of water temperature, and the water temperature is within a certain range, and for each increase of 1°C, the feed rate for fish of the same weight increases by 0.1% to 0.5%. Do not The water temperature has different feeding rates, and in the normal conditions of fish activity, the correct and relevant feeding rate should be taken according to the water temperature to ensure normal fish feeding, promote fish metabolism, accelerate fish growth, and reduce the feed coefficient. In addition, other physical and chemical factors in the water will also have a great impact on fish intake, such as excessive levels of harmful substances such as ammonia and nitrous acid in the water, especially if the nitrous acid exceeds the standard (>0.2 mg/kg). Oxygen in the blood circulation of the organism is abnormal, which affects the normal feeding and growth of the fish and increases the consumption of feed.In addition, the acid or partial alkali in the water also affects the feeding and growth of the fish, resulting in the waste of feed. The route is the way to open up the living space, which can only achieve the ultimate goal through the adoption of healthy breeding and fine scientific management—reducing costs and increasing economic benefits.

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