Eight key techniques for reducing Feed coefficient in Aquaculture

Feed coefficient is also called feed coefficient. It refers to the ratio of feed amount fed to total net yield of breeding object. The smaller the ratio, the less feed is required to increase the yield per unit of aquatic product. Therefore, the smaller the ratio, the lower the feed coefficient, that is, the lower the feed cost and the higher the economic benefit of breeding. In the breeding process, reducing the feed coefficient is a systematic project, which runs through the whole process of breeding production. The key technology of reducing feed coefficient is introduced as follows: 1. Improve breeding mode and adopt new breeding technology. With the progress of science and technology, new breeding technology with high yield continues to emerge. For example, in the current freshwater culture, the 80:20 high-quality fish-based culture technology is being promoted; in the marine fish culture, the cage culture technology is adopted; in the shrimp culture, the shrimp fry are put into the pond with fertilizer, and the plankton culture technology is suitable for shrimp feeding, etc., all of which are advanced culture technologies that reduce the feed coefficient and increase the culture benefit. 2. Select the excellent varieties with fast growth speed and high feed conversion rate for stocking. According to the comparative test, compared with common crucian carp or pure silver crucian carp, under the condition of eating the same quality and quantity of feed, the feed coefficient of the same yield should be reduced by more than 30%. Under the same feed conditions, the growth rate, overall yield and individual size of mitten crab seedlings cultured in yangtze river water system were better than those cultured in other water systems, and the feed coefficient was much lower. 3. Establish good water environment conditions for benign ecological breeding 1. Prevent water pollution and create a good water environment. Ensure the normal growth of cultured organisms, effectively reduce the feed coefficient, improve the quality and quantity of products, achieve the goal of producing green aquatic food, and improve the economic benefits of aquaculture. 2. Increasing dissolved oxygen content in water and decreasing harmful gas concentration are effective measures to reduce feed coefficient. The feed coefficient of fish at DO 3.0 mg/L was-fold higher than that at DO 4.0 mg/L. 3. Pay attention to the influence of water temperature change on feed coefficient. When we feed, we should increase or decrease the feeding amount with the rise and fall of water temperature in order to achieve the best feed coefficient and reduce the cost of breeding. Scientific and reasonable stocking technology, including stocking density, stocking object quality, stocking operation method, etc. 1. First of all, according to the local climatic conditions, water quality conditions, and biological conditions to determine the appropriate stocking density, that is, the optimal stocking amount. If the density is too large, the breeding object grows in a bad water environment, and the feed coefficient used will definitely rise; on the contrary, if the density is too thin, the potential of the water body cannot be fully utilized, the output value benefit will decrease, and the feed coefficient will also rise. 2. The stocking specification and quality of breeding objects is the second factor determining feed coefficient in stocking technology. If the quality of stocking varieties is good, the physique is strong, the appetite is strong, the digestion and absorption rate is strong, the energy conversion rate of feed is also high, the weight gain is rapid, and the performance in the feed coefficient will be reduced. 3. In the breeding of ponds or inner ponds, attention should also be paid to the mutual interference behavior of species on feeding to avoid the decline of feed utilization rate. Generally, after the domestication and feeding of the main fish are completed, other fish should be put into the fish. Five, feed itself varieties, specifications, quality and processing technology level and other factors, the impact of feed coefficient At present in aquaculture production commonly used feed has natural, artificial two categories, should gradually promote the use of artificial compound feed. Also should choose the quality and specification correctly and breed the high-quality feed that the object suits. In aquaculture, when artificial compound feed is used for feeding, besides the quality of raw materials, the nutrition ratio and processing technology quality in the formula of compound feed should be examined. First of all, it is required to have good stability in water, shrimp feed to reach 4-6 hours, fish feed requirements to reach 2 hours. The type and size of particles should be suitable for feeding by breeding objects. In addition, there should be better palatability, attraction and so on. In the conventional sea and freshwater fish culture, generally less than 10 grams of fish species, should choose the particle size of 0.5-1.5 mm broken feed for feeding;10-15 grams of juvenile fish, should choose the particle size of 1.5-3.0 mm, length of 4-5 mm cylindrical pellet feed for feeding; more than 50 grams of fish cultivation stage, should choose the particle size of 4-6 mm, particle length of 6-8 mm cylindrical pellet feed. Shrimp and crab compound feed also has corresponding special specification requirements. 6. Scientific feeding management and feeding technology can reduce the feed coefficient. Determining the reasonable optimum feeding amount is the most important part of feeding technology and the key factor to reduce the feed coefficient. Correct use of "four fixed" feeding method for feeding. In aquaculture, there are two kinds of feed input: manual input method and mechanical input method. No matter which species should master the "uniform, slow" principle, and in cage culture and factory water culture, more attention should be paid to the correct feeding method. VII. Do a good job in the storage management of feed. Use feed within the shelf life in breeding production. Feed purchase shall not be too many times. At the same time, check whether the freshness, production date, shelf life and nutritional ingredients of feed meet the label requirements. Without laboratory conditions, we should also use eyes, hands, nose, mouth taste and other methods to carefully identify. The above measures lay a good foundation for ensuring the reduction of feed coefficient. Eight, pay attention to the natural bait to reduce the artificial feed coefficient of the promotion of aquaculture, we in the full use of artificial feed today, must not ignore the important role of natural bait on the growth of breeding objects. Applying base fertilizer, timely topdressing, and cultivating corresponding natural palatable bait according to different periods are still important supplementary means for us to carry out modern breeding and reduce feed coefficient. According to production practice, it is generally proved that in the growth period of shrimps and crabs, if sufficient natural bait can be obtained, artificial feed can be saved by more than 1/3. The shrimp culture water surface with good natural bait, the feed coefficient of the shrimp artificial feed used can be reduced to below 1.0, becoming an important means to obtain good economic benefits. Work experience, worth learning. -------------------------------------- Eight key technologies for reducing feed coefficient in aquaculture have practical significance!-------------------------------------- - ----------------------------------------- Aquatic products, livestock and poultry; both: Variety + management + high quality feed = benefit--------------------------------------- ------------------------------------- Thank you for your kind words!----- Good information, thank you for your hard work!-------------------------------------- Work experience is worth learning from.