Outdoor fly breeding technology

Although the production of outdoor fly maggots is lower than that of the three-dimensional breeding maggots, and it is not as stable as the three-dimensional fly maggot breeding, it has the advantages of less investment, quick effect, no introduction, no need for feeding, low cost, etc., and is currently the majority of farmers. s Choice.

The suitable season for outdoor fly maggot breeding is generally from the end of April to the middle of October each year.

Simple farming room construction

The venue is located far away from the living area, where there is shade but there is a certain amount of light and there are more wild flies. The area should be determined according to the required output. According to the production experience, the average output per square meter is about 0.5 kg. As long as the breeding room can cover the rain, thatched house, cement tile house, bark house will do. Around the house, a screen with a height of 1 meter should be used to prevent animals such as chickens and ducks from entering. Aquaculture ponds require simple cement pools, each with an area of ​​1.5 to 2 square meters and a poolside height of 20 centimeters.

Dung preparation and placement

Fresh pig manure (within 3 days for pigs) 70% for chicken manure (in one week) 30%; fresh pig manure for slaughterhouse 100%; pig manure 75%, bean curd residue 25%; chicken manure 50%, Pig manure 25%, bean curd residue 25%. Mix the above manure, the moisture content is 100%, put the manure into a height of 20 cm, cover it with a plastic film, and use it after 24 hours to 48 hours. Due to outdoor farming, fecal material can also be directly fed into the culture tank without fermentation. The fermented manure was sent to the mortuary and three pilings were placed in each pool. Each bar was 0.8 meters long, 0.2 meters wide and high. 0.15 meters. The excrement time is from 4 to 5 pm every afternoon.

Preparation and placement of egg-laying materials

Due to the fact that there are more choices for gathering eggs in the open air, dead fish can be placed directly on the dung heap, or they can be formulated according to the following formula: 100 kg of manure: 1 kg of wheat bran, 2 fish meal, 2 peanut bran Two, water 1.5 kg. After mixing, it can be placed on the dung heap. After placing the egg, it is forbidden to walk around the pool.

Daily management

When the manure is put well, the ovipositor (preferably the dead fish or the viscera of the fish, which attracts the wild flies in the first few days) is placed on the ovipositor in the place where there are more wild flies within half an hour. A large number of flies lay eggs, and at 9 o'clock in the evening, a small layer of egg is used to cover the eggs produced by the fly to increase the hatching rate and reduce the damage of ants and other insects. The eggs of the fly will all be hatched in the next morning. From 36 hours to 48 hours, the fly larvae have already scattered the neat piles that had been neatly stacked. The fly larvae, which grew up first in 72 hours, climbed out of the dunghill and were automatically separated and collected. In the barrel, generally the fly maggots in the manure have been completely separated on the seventh day.

Assuming that you have a total of 14 Dianchi ponds, you should enter two pools per day and fill them up on the seventh day. On the eighth day, shovel out the remaining manure from the fly larvae on the first day and replace them with new ones. This cycle of production.

At 10 am, the fly maggots are collected from the harvesting bucket, shoveling out the remaining excrement from the fly maggots, and the other pools are loosened by the fly maggots and the manure is piled up in the middle of the dung piles on the pool side so as not to cause damage. Blocking, the separation of fly larvae is not clear.

Outdoor simple breeding maggots do not require feeding. However, in order to allow the fly to stay in the vicinity of the breeding room and do not want to go, it is necessary to put new feces and oviducts every day. The food of the fly is mainly derived from the manure and the oviposition.

Since the fly maggots cannot be sterilized, the maggots cultivated must have a lot of harmful bacteria. It is recommended that the maggots should be soaked with potassium permanganate in water for 5 minutes and then fed to economic animals.

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