What are the key points of outdoor maggot farming technology?
Although outdoor maggot farming has lower yields than three-dimensional maggot farming and is not as stable as three-dimensional maggot farming, it has the advantages of low investment, quick results, no need to introduce breeding stock, no need to feed the flies, and low cost, and it is currently the choice of most farmers.
The suitable season for simple outdoor maggot farming is generally from late April to mid-October each year.
The simple farming house should be built in a place far from residential areas, with tree shade but some light, and with many wild flies. The area should be determined according to the required output. Based on production experience, the average yield is about 0.5 kg per sq m. The farming house only needs to be able to keep out rain; a thatched house, cement tile house, or bark house will all do. The perimeter of the house must be enclosed with 1 m high screen windows to prevent chickens, ducks, and other animals from entering. The farming pond should be a simple cement pond, each with an area of 1.5 sq m to 2 sq m, and the pond edge should be 20 cm high.
Preparation and placement of manure material: fresh pig manure (within 3 days after the pig excretes it) 70%, chicken manure (within one week) 30%; 100% fresh pig manure from a slaughterhouse; pig manure 75%, okara 25%; chicken manure 50%, pig manure 25%, okara 25%. Mix the above manure materials, with moisture content at 100%, pile the manure to a height of 20 cm, cover tightly with agricultural film, and it can be used after 24 hours to 48 hours. Because this is outdoor farming, the manure material can also be used without fermentation and sent directly into the farming pond. Send the fermented manure material into the maggot house, and pile it in three strips in each pond, each strip 0.8 m long, 0.2 m wide, and 0.15 m high. The time for placing the manure is 4 pm to 5 pm every day.
Preparation and placement of the egg-collecting material: because this is outdoors, there are more choices for the egg-collecting material. Dead fish and other materials can be placed directly on the manure pile, or it can be prepared according to the following formula: calculated based on 100 kg of manure material: wheat bran 1 kg, fishmeal 2 liang, peanut bran 3 liang, water 1.5 kg. After mixing evenly, it can be placed on the manure pile. After the egg-collecting material is placed, walking beside the maggot pond is prohibited.
Daily management: after the manure material is placed and the egg-collecting material is put on (for the first few days, it is best to use dead fish or fish internal organs to attract wild flies), in places with many wild flies, a large number of flies usually gather on the egg-collecting material to lay eggs within half an hour. At 9 pm, use a small amount of egg-collecting material to cover the egg masses laid by the flies with a thin layer, so as to increase the hatching rate and reduce damage from ants and other insects. The fly egg masses will all hatch by the next morning. After 36 hours to 48 hours, the maggots have already crawled the previously neatly piled manure into a very scattered state. After 72 hours, the first maggots that have grown larger begin to crawl out of the manure pile, automatically separate, and fall into the maggot collection bucket. Generally, by the seventh day, all the maggots in the manure material have been completely separated.
Assume you have 14 maggot ponds in total. You should add manure to two ponds every day, and all will be full by the seventh day. On the eighth day, shovel out the residual manure from the first day after the maggots have all emerged, and put in new manure material. Production cycles in this way.
At 10 am, collect the maggots from the maggot collection bucket and shovel out the residual manure after the maggots have all emerged. For the other ponds, shovel the manure that has been scattered by the maggots and has piled up at the pond edge onto the middle of the manure pile, so as to avoid blockage and prevent the maggots from being unable to distinguish the route during separation.
Simple outdoor maggot farming does not require feeding. However, in order to keep the flies around the maggot farming house and unwilling to leave, new manure material and egg-collecting material must be placed every day. The flies' food mainly comes from the manure material and egg-collecting material.