Advantages of aquaculture extruded feed

Aquaculture has always been an important part of national agriculture, relying on mountains to eat mountains and water to draft water. For the vast number of farmers close to the waters, aquaculture is a realistic and feasible method and method for them to obtain economic benefits. The types of fish feed have also gone through a process from raw to cooked, from shallow processing to deep processing, from the original pulverized fish and shrimp for direct feeding, to the later matured pellet feeding, to the current nutritional ratio scientific feeding. During the entire evolution of feed, fishermen have deeply realized the importance of feed pellet absorption for aquaculture. Because the same fish species are fed with different feeds, the time for fish and shrimp to enter the market will be very different and the quality of fish meat will be very different. The taste is very different, so the economic benefits to the fishermen are completely different. Therefore, the types of feed generally accepted by fishermen are: high-protein extruded feed pellets, with high protein content, fast fish growth, good absorption, low feed waste, and less damage to water quality by fish excretion, which can be recycled and developed. Ecological Agriculture. It is a powerful tool and means for sustainable fishery development.

Extruded Aquatic Feed

Aquatic feed products are mainly divided into three types: powdery feed, granular feed (traditional hard granular feed) and extruded feed according to different processing techniques.

1.Aquatic feed processing technology comparison

 The processing requirements of extruded materials are more complicated than those of granular materials. The main differences are in the processes of conditioning, puffing and liquid spraying:

(1) Conditioning and tempering: In the process of tempering, water and steam are added together to produce the puffed material, and the moisture content after tempering is about 25%, while for the production of pellets, only steam is added, and the moisture content after tempering is low. is about 17%.

(2) Puffing and liquid spraying: There is no puffing process and liquid external spraying process in the production of pellets, but an additional granulation process. The raw materials required by the extruded material processing technology are pulverized more finely, and the high-temperature puffing process can improve the degree of starch ripening, which is conducive to the digestion and absorption of feed by fish.

(3) Advantages of puffing materials: puffing materials require the raw materials to be pulverized more finely, and the high temperature in the processing process not only improves the degree of starch ripening, but also the instant strong rubbing of high temperature, high humidity and heat during the puffing process can kill some harmful bacteria in the raw materials Therefore, compared with ordinary pellets, extruded feed can improve the digestibility and utilization rate of feed and reduce the incidence of disease.

On the other hand, the extruded material has a stability of 12-36 hours in water, which is convenient to visually check the feeding situation of the fish and reduce water pollution.

2. Extruded material and pellet material

With the enhancement of the concept of environmental protection and green and healthy farming, pellets will be gradually replaced by extruded materials. Compared with powder and pellets, although the extruded feed is more expensive, the feed conversion rate is higher, the comprehensive benefit is better, and the pollution to the water area is smaller. In recent years, farmers' acceptance of extruded feed has gradually increased.