Technical measures for high yield feeding of earthworms in earthworm culture

1. Feeding by stages

Giving different culture management according to the individual development stage of earthworm is the key to whether the artificial culture of earthworm can achieve high yield. The traditional mixed culture method of "several generations in the same house" cannot be different in harvest and utilization: the adult worms that exceed the best harvest time are not harvested in time, and the bait and breeding equipment are wasted; for the young worms that have not reached the best harvest time, the yield is reduced and the labor intensity is increased by manual sorting. When artificial breeding, it is necessary to establish a special planting vermis pool and production worm pool.

Second, thin feeding and frequent removal

Adult worms are fed twice a month, removing earthworm feces, taking worm cocoons or turning over the feeding bed three or four times, each time with a thickness of 15 cm to 20 cm, always keep the bait fresh and breathable to create the best ecological environment for earthworms. Timely harvest in the previous data, the annual harvest of earthworms for 3 to 5 times. However, in the production, it is found that under the condition of sufficient feed, making use of the dominant period of earthworm growth and reproduction (before and after sexual maturity, marked by the occurrence of vermis) to carry out short-term (usually one month) high-density culture, while increasing the number of harvesting, timely regulation and reduction of population density and maintaining the dynamic balance between growth and harvest are the key to high yield of earthworms.

Third, rotational updating

Through the continuous renewal of worms and the periodic rotation of the culture bed, not only the exuberance of the population was ensured, but also the natural decline of the population formed by long-term culture of the same worm group in the same bed was avoided. Planting worms should be updated every March or April.

Aquaculture management

Earthworm culture can be divided into several periods, such as earthworm, worm cocoon hatching, early young worm, late young worm and adult worm. The management requirements in different periods are as follows:

1. Seed worm management. The culture density should be controlled at 2kg to 2.5kg per square meter or 10 to 15000 pieces per square meter, and earthworm feces should be removed every six or seven days, and the collected worm cocoons should be put into the incubator to keep them moist and hatch. at the same time, the wormbed should be turned over and fed with the side feeding method to improve the ecological conditions of the feeding bed and facilitate reproduction.

2. Management of incubator. The thickness of the hatching base should be 10 cm to 15 cm, and the hatching base should be kept fine and moist. 50,000 to 60,000 worm cocoons can be hatched per square meter, and the hatching base should be loosened with an iron fork once or twice a month to facilitate ventilation and survival of young worms.

3. Early larval worm management. When most of the incubation medium is dung, the feces should be removed in time, the feeding method should be used and the bed should be expanded in time to reduce the density of young worms.

4. Management of young and adult worms in the later stage. In the later stage, young worms should grow rapidly, and the times of removing feces and feeding should be increased, the feeding method should be used and the bed should be expanded in time for breeding; when the sexual maturity enters the breeding period, the advantages of earthworm production and cocoon production should be brought into full play, and the breeding density should be reduced or harvested and utilized in time, or the old seed worms should be replaced.

5. Control of culture density

The best density of earthworm culture is 2.8 kg to 3.1 kg per square meter or 20,000 pieces per square meter. In this range, the planting is less and the yield is high. In the early stage, the culture density of young worms can be slightly more than 30,000 per square meter or 2.5kg per square meter, while in the later stage, the culture density of young worms to adult worms can gradually decrease to about 20,000 per square meter. The density control should be combined with rotational renewal. The worm bed, incubation bed, early stage young bed and late stage young bed should be constructed according to the area ratio of 1 ∶ 1 ∶ 2:4, combined with expanded bed culture, the requirement of controlling density can be achieved.