Key points of breeding and management of fly maggots in spring

Raising economic animals requires a large amount of animal protein feed, but the high feed price makes the economic benefits of the farm in crisis. In fact, the biggest feed expenditure is animal protein feed. Is there any way to reduce the cost of purchasing animal protein feed and achieve a good feeding effect? Breeding fly maggots with livestock and poultry manure can not only treat the animal feces with environmental protection, but also produce a large amount of protein feed, which can greatly improve the economic benefits of the farm.

According to the experimental analysis, the crude protein content of fly maggot is similar to or slightly higher than that of fresh fish, fish meal and silkworm pupa powder. The nutritional composition of fly maggots is also more comprehensive, containing a variety of amino acids needed by animals, the content of each amino acid is higher than that of fishmeal, the total amount of essential amino acids is 2.3 times that of fishmeal, the content of methionine is 2.7 times that of fishmeal, and the content of lysine is 2.6 times that of fishmeal. Breeding maggots raise flies in rooms or fly cages, and feed livestock and poultry manure to maggots after adding EM microorganism fermentation, which can produce a large number of maggots in a few days. The management of breeding maggots in spring should pay attention to the following points: first, the activity of flies kept warm in the fly room is greatly affected by temperature. It can only crawl at 4-7 ℃, fly at 10-15 ℃, feed, mate and lay eggs at more than 20 ℃, and is especially active at 30-35 ℃. The temperature is lower in spring. The temperature difference between day and night is large, under natural conditions, flies lay few eggs, or even do not lay eggs, if there is a cold wave, it will also cause a large number of flies to die. In order to ensure the normal spawning of flies and the stable production of maggots, we must implement heat preservation measures for fly rooms. In the room, some smaller spaces are separated by foam sheet or plastic film to make some sealed 10 cubic meters sealed fly breeding rooms (with appropriate exhaust pores), and the flies are concentrated in these fly rooms and raised separately. The fly breeding room with poor light needs to hang a light bulb of more than 100W to fill the light. When the fly room is still less than 20 ℃ in heat preservation, it is necessary to increase the temperature appropriately, and the smaller fly room can use electric lamp or electric furnace to increase the temperature; for the larger fly room, you can put a honeycomb coal stove inside to increase the temperature, and the furnace should add a cover to export the gas to the fly room with an iron chimney to prevent harmful gases from poisoning flies. 2. The formula for feeding fly maggots by manure fermentation is as follows: 1. Pig manure 60% chicken manure 40% 2, chicken manure 60% pig manure 40% 3, pig manure 80% alcohol 10% corn or wheat bran 10% 4, cow manure 30% pig manure 60% rice bran or corn meal 10% 5, bean curd or cassava dregs 2050% chicken, pig manure 50% 80% 6, chicken manure 100% or pig manure 100% Then add about 10% chopped straw and evenly pour into EM active bacteria (5 kg per ton of dung) to make the manure contain 90% of water and ferment in a sealed fermentation tank. Turn the feces on the third day and add 3 kilograms of EM per ton of dung. Generally, the feces can be used after 6 days. The temperature is low in spring, and the fermentation time of manure is shortened appropriately, so that the manure can ferment to produce heat in the process of feeding fly maggots, which can reduce or eliminate the external heat source, and the maggots can grow normally. Third, the fly room of 10 square meters of vas deferens ensures the number of at least 20,000 flies. Set aside an appropriate number of maggots to turn into pupae-feathered flies every 2mur3 days, because flies usually live for about 15 days, and seed flies age and die every day. The flies should be fed regularly every morning with 350 grams of water, 50 grams of brown sugar and a small amount of milk powder (10 square meters of breeding area). In order to increase the fecundity of flies, add 2 grams of oxytocin (oxytocin should be suspended for 3 days). The above raw materials are melted and added to the plate sponge, and a small plate is filled with a small amount of brown sugar for flies to feed. Food plates and sponges should be cleaned every 2 days. Every afternoon, put the egg collector in a basin and put it in the fly room for flies to lay eggs on it. Egg collection can be made of fresh animal offal or wheat bran mixed with fresh pig blood. In the evening, cover the egg mass with a few egg collectors to facilitate hatching. the next day, the egg collection and the egg block will be taken out together and added to the maggot pond dung pile. 4. After fermentation, the feces of fine breeding fly maggots are piled into the maggot pond and stacked with 5 ridges with a height of 20-30cm. Add the egg collection with fly eggs taken from the fly room to the feces, and add it again the next day, and the hatched maggots will drill into the feces to feed. In the process of cultivation, if it is found that the hatched maggots have been hovering on the surface of the feces and do not get into the feces, wheat bran mixed with pig blood or fresh animal offal should be properly added to feed. Fly maggots come out and crawl everywhere from the feces before they grow up, indicating that the air permeability of the manure is poor or that the nutrients have been exhausted. We should turn the material according to the situation or add new manure as soon as possible. In general, about 6 days, all the fly maggots in the feces crawl out, and the nutrients of the feces are basically consumed. All the dung should be shoveled out and replaced with new dung for production and cultivation. The scraps were added to EM for sealed fermentation for 7 days, and then used to raise earthworms.