How to raise red nematodes

Red nematode propagates quickly and has high nutritional value. It can be used as bait and food for fish. The market demand is good, and now there are many people raising it. How do red nematodes come from?

How to raise red nematodes

The main results are as follows: 1. The raw materials of the culture medium can be selected as sludge, loosening agent and organic manure, which are rich in organic matter. Among them, the sludge can choose fish pond sludge, rice field fat mud, black mud on the edge of sewage ditch, bagasse can be used as loosening agent, chicken manure and cow manure can be used as organic manure. First lay a layer of loosening agent on the bottom of the pool, the dosage is 2-3 kg per square meter. Immediately spread a layer of sludge so that the total thickness reaches 1012 cm per square meter, submerge the base surface with water, apply cow, chicken and pig manure, about 10 kg per square meter after soaking for 2 days, and apply a layer of sludge with a thickness of 3 cm to 5 cm before inoculation. at the same time, apply a layer of fermented wheat bran mixed with rice bran and cornmeal on the mud surface, sprinkling 150kg 250g per square meter. Finally, water is added to make the surface of the culture medium 3-5 cm deep. The culture medium for the newly built pool can generally be used continuously for 2-3 years, after which it should be updated.

2. Every autumn, when the temperature drops to about 28 ℃, it can be introduced into the pond. The provenances of red nematodes are abundant in sewage ditches, livestock and poultry farms, slaughterhouses, sugar factories and food factories in the suburbs of cities and towns, and can be collected nearby. The inoculation work is relatively simple, that is, the collected species can be evenly scattered on the culture medium surface of the pool. It is appropriate to inoculate 500g to 750g per square meter of culture area.

3. Red nematodes especially like to eat sweet grain feed, and livestock and poultry manure, domestic sewage and wastes from the processing of agricultural and sideline products are their high-quality feed. However, the feed should be fully cooked and fermented, otherwise they will ferment in the pool to produce high heat to "burn" insect species and larvae. The manure can be cooked naturally in the pit letter according to the routine. the grain feed is fermented with water for 16 hours before feeding, and the material is mixed at room temperature above 20 ℃. Add water and knead it into a ball by hand, drop it and disperse it, then shovel it into a pile, beat it firmly, and cover it with plastic sheeting. If the room temperature is below 20 ℃, yeast tablets should be added to promote its fermentation. The dosage is about 1 tablet per 1kg dry feed. The mixture will be mixed at 15: 16 pm the day before, and it will be fermented and ripened in the morning the next day. Uncovering the plastic sheeting has a strong smell of sweet wine to prove that it can be fed to worms. 200 kg of rotten manure per mu was applied every 10-15 days from inoculation to pre-harvest, and about 300 kg of manure and appropriate amount of grain feed were applied after each harvest to promote the rapid growth of red nematode. When feeding fertilizer, you should first dilute and stir with water to remove grass residue and other sundries, and then sprinkle evenly on the surface of the culture medium, do not pile up in the pool in lumps, and be sure to close the inlet before feeding, so as to avoid the loss of feed drift.

4. When raising red nematodes, we need to use tools to beat the culture pond. Known as Lei Chi, the method is to use a "T"-shaped wooden rake to seriously beat the culture medium of the pool and consciously beat the moss and weeds into the pool. The function of the beating pool is to prevent the formation of the culture substrate, to remove the harmful gases produced by the decomposition of metabolic waste and feed materials of red nematodes, and to effectively inhibit the growth of moss, duckweed and weeds. Fourth, it can often keep the surface of the medium smooth, which is conducive to the smooth flow of water. The water depth should be controlled at 3 cm to 5 cm.

5. On a better sunny day in early spring, the pool water can be shallower during the day to increase the pool temperature by using solar energy, and deepen appropriately at night to keep warm and prevent freezing; the pool water should be deeper in the high temperature period in midsummer to reduce solar radiation, and it is best to plant vine crops for shade above the pool in advance. Too large water flow will not only take away the nutrients and bacteria on the culture medium, but also aggravate the physical consumption of red nematode itself, which is disadvantageous to increasing production. However, too low flow rate or even static water state for a long time is not conducive to the supply of dissolved oxygen and the removal of harmful substances such as metabolic wastes, resulting in the deterioration of water quality and the death of a large number of red nematodes. Red nematodes are very sensitive to harmful substances such as pesticides in water, and industrial wastewater, field water that has just been sprayed with pesticides or water containing medicine for the treatment of fish diseases can not be used.

6. The reproductive ability of red nematode is very strong. After 30 days of inoculation in the newly-built pond, it enters the peak period of reproduction, and it can remain prosperous all the time. But the life span of red nematode is not long, generally only about 80 days, a few can live to 120 days. Therefore, collecting insects in time is also one of the key measures to obtain high yield. The harvesting method is that the water is cut off or the water flow is reduced the night before, resulting in a lack of oxygen in the pool, and the worms in the water can be easily scooped out with a small net made of polyethylene cloth early the next morning. The amount of red nematode harvested each time is based on the "worm mass" on the surface of the culture medium. In this way, the fecundity of the population will not be affected, and the yield will not be reduced due to the senescence and death of red nematode due to untimely harvest.

The breeding of red nematode is briefly introduced here, and if you encounter problems in the process of operation, you still need to consult the people concerned.