First, the nutrients of fly maggot
According to analysis of the nutritional components of fly maggots at home and abroad, fly maggots contain 59-65% of crude protein and 10-12% of fat. Regardless of raw material or dry powder, the crude protein content of fly maggots is similar to or slightly higher than that of fresh fish, fish meal, and meat and bone meal. The fly's nutrient composition is relatively comprehensive, containing a variety of amino acids required by the animal, each amino acid content is higher than fish meal, the total amount of essential amino acids is 2.2 times that of fish meal, methionine content is 2.7 times that of fish meal, lysine The content is 2.6 times that of fishmeal. The total amount of essential amino acids of fly maggots and dry powders was 44.09% and 43.83%, respectively, which exceeded the reference value of 40% proposed by the Food and Agriculture Organization (FAO) and the World Health Organization (WHO), and its essential amino acids (E), non- The total essential amino acid (N) values ​​were 0.79 and 0.78, respectively, which exceeded the reference value 0.6 proposed by the two organizations.
Second, the processing and use of commodities
(1) Direct use: Goods can be directly fed to chickens, cockroaches, ornamental birds, bullfrogs, scorpions, special fish, prawns, scutellaria, eels, cockroaches, etc. without processing. (2) Muscilla protein complex feed: fly maggots fed with chicken manure or agricultural product leftovers as a culture medium can be dried together with the culture medium and crushed to be processed into a fly maggot protein composite powder and added as 5-10% Chicken compound feed has a good feeding effect. (3) Pure fly maggot protein powder: The separated pure wolfberry is dried at high temperature, sterilized, crushed and processed into dried wolfberry powder, and the pure protein content is about 60%, which can be used instead of Peruvian fishmeal to add to various compound feeds. (4) Edible protein powder: Commercial quail, which is fed with artificial compound feed, can obtain edible protein powder with extremely high nutritional value through chemical extraction and spray drying.
Third, the fly feeding effect
According to a number of feeding tests, it has been confirmed that some or all of the fish meal is replaced with fly maggots or fly larvae for feeding animals, fish, etc., and has received good results.
The first open biotechnology application research institute in Ningbo, Zhejiang Province, used fly larvae to test the aquaculture seedlings. The growth rate, survival rate, and disease resistance of fish, shrimp, and crabs were greatly improved, indicating that fly maggots are a high-quality feed for aquatic products. The test was conducted on laying hens. The breed was Xianju chicken. Compared with conventional breeding, laying hens started production 30 days in advance and the egg production rate increased by 10%. In the past four years, the survival rate of hens reached 100%, and the cholesterol of produced eggs was only 311 mg per 100 grams, which was 55% lower than that of 680 mg of ordinary eggs. The low-cholesterol eggs raised by this organism have been welcomed by consumers.
In addition, there are reports that the use of fly maggots, bull frogs, oysters, leeches, shrimp, etc., have achieved more significant economic benefits.
In summary, maggots and cockroaches are used as live feeds for livestock and poultry, and fish, especially for juvenile stages (such as juveniles and chicks) of livestock and poultry, and animals that prefer live food for food ( Such as bullfrogs, ornamental birds, storks, etc.) have advantages that are incomparable to other feeds.
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