How high is the nutritional value of fly maggots as feed?
The larvae bred by the housefly are called fly maggots, and they are a high-quality animal protein feed. Feeding laying hens with 10% fly maggot meal increases their egg production rate by 20% compared with laying hens fed the same amount of fish meal, and improves feed efficiency by more than 15%. So, how do you raise fly maggots?
Operating steps:
1. Manure formula and fermentation. Formula 1: 70% fresh pig manure (within 3 days), 30% chicken manure (within one week); Formula 2: 100% fresh pig manure from a slaughterhouse; Formula 3: 60% pig manure, 30% soybean residue, 10% bran; Formula 4: 70% chicken manure, 30% distillers grains. Fermentation method: mix 1 tonne of manure, 20 kg of health liquid, and 5 kg of cornmeal thoroughly with the manure in a fermentation pit, cover with plastic film and seal tightly, and it can be used after 1 to 3 days of fermentation.
2. Send the fermented manure into the maggot house, and pile it in each pit in 3 strips, each strip 0.8 m long, 0.2 m wide, and 0.15 m high. The time for adding manure is: 8 to 9 o'clock every day in winter and spring, and 16 to 18 o'clock in summer and autumn.
3. Place egg-collecting material on the manure piles, 3 small piles per strip. The formula for the egg-collecting material is: calculated on the basis of 100 kg of manure, 1 kg of wheat bran, 100 g of fish meal, 150 g of peanut bran, and 1.5 kg of water. After mixing evenly, it can be placed on the manure piles. After the egg-collecting material is placed, walking around in the maggot house is prohibited.
4. Under normal conditions, after the egg-collecting material is placed, flies will gather on the egg-collecting material to lay eggs, and at 20 o'clock a small amount of egg-collecting material is used to cover the exposed egg clusters.
5. At a room temperature of 25 to 35°C, the egg clusters generally hatch into small maggots after 8 hours. At this time, if the manure piles are found to be too dry, sprinkle a small amount of water. The small maggots will first eat the egg-collecting material, and then burrow into the manure piles to grow; 24 hours after hatching, the previously neatly piled manure has been crawled apart by the maggots as they eat. At this time, attention should be paid to maintaining the moisture of the manure piles. When the manure piles are found to be dry, water should be added promptly. At this time, it is best to use pigpen water treated with health liquid for watering, and the amount of water added is best such that no water is seen flowing out of the manure piles; as the maggots continue to grow, the manure piles have become completely loose, and 72 hours after the maggots hatch, some of the earlier-maturing maggots begin to crawl out of the manure piles and fall into the maggot-collecting buckets. From 72 to 96 hours is the peak period for crawling out. At this time, the manure piles scattered by the maggots should be piled into one large pile twice a day, for the purpose of clearing and keeping the scattered manure from blocking the edge of the pit and preventing the maggots from smoothly crawling into the maggot-collecting buckets. Generally, on the fourth day after the manure is added, the maggots in the manure piles have basically all crawled out. Shovel out the residual manure and add newly fermented manure again for cyclical production. At 10 o'clock every morning, it is required to spray all places in the maggot house once with health liquid diluted 50 times, in order to eliminate odor and sterilize.
6. The fly maggots in the maggot-collecting buckets must be collected twice a day, at 8 o'clock and 17 o'clock respectively. When collecting maggots, first put on a leather glove, and then grab them. Fly maggots can be fed directly to animals without disinfection.
7. Every 40 sq m maggot house must be guaranteed to have more than 300,000 breeding flies, with red-headed flies accounting for 80% and small houseflies accounting for 20%. When collecting fly maggots every 3 days, keep 1 kg of fly maggots and place them in a dedicated hatching pit or a basin to let them pupate and hatch, so as to ensure the number of breeding flies.
Cai Linghui, Jin Renren