Puffing floating material has many advantages in breeding four major domestic fish

Breeding grass carp with expanded floating water full-price feed has many advantages, such as reducing cost, protecting culture water environment, high utilization rate and so on. In the United States, Japan and other countries with advanced aquaculture technology, floating aquatic feed has been widely used since 1980s to meet the needs of environment and fishery production.

In recent years, China has also made great efforts to promote the use of floating aquatic feed, which has developed rapidly. many famous and high-quality aquatic species have been widely used, but there is still a relative lack in using expanded floating fish feed to cultivate four major domestic fish.

First, what is the puffed floating material?

The puffed floating material is based on the original formula of full-price pellet feed, improved, ripened and stirred in a higher temperature and greater pressure space than the production of pellet feed, and then entered the general air environment, so it expands naturally. Each grain of feed produces more loose pores, the same volume of feed, lighter weight, so that after proper processing, it will float on the water surface. Like popcorn, it only makes the feed more crisp and tastier and increases the conversion rate. It doesn't add some kind of chemical loosening agent, as some people say.

Second, why is it that the use of floating fish feed in other special aquaculture is quickly accepted, while the progress of using expanded floating fish to raise four major domestic fish is slow?

The ultimate reason is the question of economic benefits. Due to the high price of special aquatic products, the production of corresponding feed products, higher prices can also be accepted by users. After all, the price of the four big fish is not too high, the profit margin is small, farmers are not willing to increase the cost. To ensure feed quality, but also to farmers can accept the price, and users after the use of truly cost-effective products, is indeed more difficult than the production of pellet feed, can really take into account all aspects of factors, to give farmers a better and cost-effective expanded floating water products manufacturers are not many. Therefore, the progress in the use of floating puffing materials in the four major domestic fish farming is slow.

Third, how to choose puffed floating water material?

Relatively speaking, the production cost of producing expanded floating water is higher than that of producing pellet feed, so when choosing expanded floating water to cultivate the four major domestic fish, we should not only choose well-known brands, but also consider comprehensively in terms of quality and price. Medium and upper level feed varieties should be selected. In terms of protein content, it is best to choose varieties with protein content between 20% and 30%. Because the price of the feed with too low protein content is low, but because the processing cost of the extruded material is relatively high, the available nutrient content is relatively low, which will increase the cost of breeding; the real available feed with high protein content will be expensive, and the nutrient content in grass carp excreta will be higher, resulting in waste. In terms of price, we should choose varieties that are slightly more expensive than medium-and high-grade pellet feed used on a large scale in the market.

What are the advantages of using expanded floating water to raise the four major domestic fish?

First, the feed utilization rate is high. Because the extruded material can only be produced after higher processing temperature and longer ripening time than pellet feed, it has a better degree of ripening, and can change the structure of unabsorbed components in feed so that it can be digested and absorbed. And eliminate harmful substances in the feed, just as humans digest and absorb most cooked food better, the absorption and utilization rate of grass carp is increased by more than 30% after the same pellet feed is puffed. And good puffed floating grass carp is as crispy as biscuits, grass carp is palatable and eats better. Second, it is easy to manage. The expanded floating water material can float on the water surface for a long time, and the floating time is more than 10 hours. it is easy to observe the feeding condition of fish and control the feeding quantity, and it can be reduced to zero in artificial waste, and it is convenient for feeding, saving a lot of time and improving labor production efficiency. Third, disease prevention is good. Escherichia coli, mold, salmonella and other harmful bacteria in the material are completely killed by high temperature and high pressure in the process of puffing, which can reduce the infection of intestinal diseases of the four domestic fish and reduce the occurrence of diseases. Because the floating fish feed floats on the surface of the water, the four domestic fish can only feed on the surface of the water body, so that the sludge containing a large number of bacteria at the bottom of the pond will not be turned over, reducing the chance of infection, and the surface water of the culture pond water is rich in dissolved oxygen and less harmful substances. In such an environment, the four domestic fish not only eat better, but also have stronger disease resistance, and grow healthier and faster. Fourth, the water quality remains better. Because the digestion and absorption rate of expanded floating water feed is higher than that of pellet feed, the feed coefficient is lower, the nutrient content in fish excreta is lower, and there is less powder, which can avoid residual bait in the water body, which greatly reduces the pollution of the water environment. It is extremely beneficial to ensure the production of the four domestic fish in a better water environment.

Fifth, how to choose the feed of overwintering grass carp?

In general, after the water temperature drops in winter, grass carp eat little or no food to sink water, which restricts its growth. If it is easy to cause waste and sink water by throwing particles, the growth of grass carp is also limited. Through the author's large-scale experiment, it is found that grass carp can have 2% to 4% feed intake when the water temperature drops to 15 ℃ in fine weather, and grass carp grows better. Therefore, the selection of floating water material in the low water temperature season is a very good material method for raising the four major domestic fish.