The pellet feed loses in the water and the fish has a high utilization rate, which can increase the growth rate of eating fish. However, the following points should also be noted when feeding fish with pellets:
1. Pay attention to choose different diameter pellet feed. Different sizes of fish should be fed pellet feeds of different diameters. Generally, fish with a body length of 4 to 6 cm should be fed a pellet feed with a diameter of 0.5 mm. For a fish with a length of 7–8 cm, a pellet feed with a diameter of 3 mm should be fed. .
2. Increase the number of feedings. The fish has no stomach, and the feed has a short residence time in the intestine. The utilization rate is not high. Therefore, when the total feeding amount is constant, the number of feedings should be increased and the amount of each feeding should be reduced, so that the fish can always be in a state of semi-starvation, which can improve feed utilization and reduce the feed coefficient.
3. Have a certain feeding area and time. In multi-variety polyculture ponds, squid and grass carp catch food fast, and the food intake is large. However, the head lice eat slowly, and the corresponding food intake is small, which often affects their growth. Therefore, the use of pellet feed must be carried out for a short period of domestication, so that the fish form a fixed food market, a fixed time of feeding habits, each feed should be sprinkled evenly, feeding time is not less than 30 minutes, feeding area 40 to 60 square Rice, so that each fish can eat feed.
4. Pay attention to adjust the feeding amount. The amount of feed should be appropriately increased or decreased according to changes in water temperature, because the water temperature is related to the feeding of fish, and the water temperature is high, and the fish eat more food, and vice versa. The water temperature is above 10°C, and the feeding amount can account for 3% to 4% of the total weight of the fish.
5. Add salt. In the production of pellet feed, 1% salt is evenly mixed in the raw materials to disinfect and sterilize fish diseases.
6. Pay attention to vitamin supplements. Because of the pellet feed during the production, vitamins have been damaged. Therefore, in the use of granular feed fish, should be fed a small amount of vitamin-rich green feed to supplement the lack of vitamins.
7. Reasonable fertilization. Feed pellet feed, because the water quality of the pool is relatively light, and it is not very good for the feeding of fertilized fish. Therefore, fish ponds fed with pellet feed should be rationally fertilized to promote the growth and reproduction of plankton, so as to increase the aquaculture production of fertilized fish.
8. Storage time should not be too long. The pellet feed contains 12% to 14% of moisture in the production process, and has a long storage time, and is easily deliquescence and moldy, which affects the use value of pellet feed. After feeding, the fish is susceptible to disease. It is best to produce while feeding.
9. Pay attention to the water quality and dissolved oxygen in the fish pond. When water quality is found to be bad, water should be added in time to improve the water quality of the fish pond. The dissolved oxygen per litre of water in the fish pond is generally required to be more than 4 milligrams. If it is less than 4 milligrams, the fish pond should be oxygenated.
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