Bean pulp rainbow trout parr compound feed and preparation method thereof

Abstract

The invention provides a bean pulp rainbow trout parr compound feed and a preparation method thereof. Every 100kg of bean pulp rainbow trout parr compound feed is manufactured by 6 to 12kg of steam fish meal, 50 to 60kg of expanded bean pulp, 10 to 15kg of corn protein powder, 3 to 5kg of beer yeast, 0.5 to 1.0kg of Squid paste, 0.5 to 1.0kg of betaine, 2 to 6kg fo flour, 1.5 to 2.5kg of soybean lecithin, 5 to 6kg of fish oil, 5 to 63kg of soybean oil, 0.3 to 0.5kg of methionine, 0.1 to 0.3kg of lysine, 0.3 to 0.5kg of Choline Chloride, 0.5 to 1.0kg of composite vitamin, 0.5 to 1.0kg of composite mineral salt and water. The invention aims at the digesting physiological characteristic during the parr period of the rainbow trout and solves the balancing problem of amino acid by optimizing and adjusting the prescription of the feed, and solves the problems of anti-nutritional factors and palatability by comprehensively using enzyme preparation and feeding promoting agent. The invention selects the feed materials with high biological availability, and has the advantages of remarkably promoting the quick growth of the rainbow trout parr, improving the surviving rate of culturing, improving the digesting and absorbing rates of the rainbow trout parr on the feed, reducing the drainage of P and N, reducing the culturing cost, and the like. The materials used by the compound feed of the invention have the advantages of reliable source, stable quality and low cost.

Description

(1) Technical field [0001] The invention relates to a rainbow trout feed, in particular to a soybean meal-type compound feed suitable for breeding rainbow trout juveniles. (2) Background technology [0002] Rainbow trout (Oncorhynchus mykiss) is a famous and precious salmon family fish with tender meat and delicious taste. Originally produced in the streams at the foot of the Sndsed Mountain in California, USA, it was transplanted to ponds in 1874 and has now become a worldwide widely cultivated species. Rainbow trout is a kind of carnivorous fish. Looking back at the development history of the trout industry in the world, during quite a period of time, its development was greatly restricted due to the use of fresh and wet feed. After entering the 1950s, with the gradual deepening of the research on rainbow trout nutrition, the industrial production of rainbow trout compound pellet feed was realized, which made a major breakthrough in trout feed, thus pushing the world's tr...

AI Technical Summary

Problems solved by technology

At present, in the high-quality rainbow trout feed at home and abroad, the content of animal protein such as fish meal and shrimp meal is about 40%-50%, and the feed cost is about 10-12 yuan / kg. There are obviously two problems in feeding this kind of feed. The problem is that the cost of feed is relatively high, and the economic benefits of breeding have been reduced.

On the other hand, because the phosphorus content in the feed is too high, a large amount of phosphorus that has not been absorbed and utilized by the fish is discharged into the external environment, resulting in a significant increase in the concentration of phosphorus in the aquaculture water. The total phosphorus can reach 0.31mg / L, and the active phosphorus can reach 0.25mg / L, which exceeds the national fishery water quality evaluation standard (0.1mg / L). With the extension of breeding time, phosphorus will continue to accumulate in the water body, which will inevitably lead to the occurrence of eutrophication in the water body

In view of the above reasons, although some domestic rainbow trout feed manufacturers have adopted cheap animal and plant protein instead of fishmeal protein in the feed formula, there are still some disadvantages. The main performance is that the production performance of rainbow trout is not ideal, and inorganic phosphorus sources need to be added To meet the nutritional needs of phosphorus, the pollution of phosphorus in aquaculture water has not been completely solved, and the amount of fishmeal protein added is generally kept above 25%