It is the key to whether or not artificial breeding can achieve high yield. The traditional “multi-generational†polyculture method can not be used for harvesting and utilization. It is beyond the best harvesting time to harvest, it is too late to harvest, waste of food and breeding equipment; When harvesting, the output is reduced, and manual sorting increases labor intensity. For artificial breeding, specialized breeding ponds and production ponds must be established. In addition to feeding twice a month, the thin ground feed shall be fed three times or four times in addition to earthworm excrement, earthworms, or inverted feeding beds. Each feeding thickness shall be 15cm to 20m. ecosystem. Timely harvesting of the past data shows that the harvest will be conducted 3 times to 5 times a year. However, in production, it was found that in the case of adequate feed, the intensive period of growth and reproduction of cockroaches (before and after sexual maturation, marked by the presence of carcasses) is implemented in short-term (usually 1 month is appropriate) high-density culture, and Increasing the number of harvests, adjusting and reducing the population density in time, and maintaining the dynamic balance between the amount of growth and harvest are the key to seizing the high yield of alfalfa. The rotation update through the continuous updating of the species and the cyclic rotation of the culture bed not only ensured the robust population, but also avoided the natural decline of the population formed by long-term breeding of the same flock in the same bed. The species should be updated every three or four months. Breeding management, breeding, breeding, breeding, breeding, early larvae, late larvae and adult pupa. Management requirements for different periods are as follows: (1) Species management. The breeding density should be controlled at 2 kg to 2.5 kg per square meter or 10,000 to 15,000 per square meter. The earthworm excrement should be removed every six or seven days. The harvested earthworms should be put into the hatching bed for moist incubation, and at the same time the overturning seedlings should be planted. Trampoline feeding with lateral feeding method to improve the ecological conditions of the breeding bed to facilitate breeding. (2) Management of hatchery beds. The thickness of hatching base should be 10 cm to 15 cm. The hatchery should be kept finely crushed and moist, and 50,000 to 60,000 can be hatched per square meter. The incubation base is loosened once or twice a month with iron fork to facilitate ventilation. Survive with pups. (3) Pre-school management. When most of the incubating bases are to be excreted, excrement should be promptly removed, and feeds should be added with the next vote and the bed should be expanded in time to reduce the calf density. (4) Management of late cubs and adult cubs. The late larvae grow rapidly. To increase the frequency of removing fecal feeds, feed them in the next batch and expand the beds in time; when sexual maturity enters the breeding period, the pupa production and calving advantages must be used, and the breeding density should be reduced or timely. Harvest and use, or replace the old species. The optimum density for the control of aquaculture density and aquaculture is from 2.8 kg to 3.1 kg per square meter or 20,000 per square meter. Within this range, there are few seeds and high yields. The breeding density of early larvae may be slightly greater than 30,000 per square meter or 2.5 kg per square meter; the rearing larvae to adult larvae can be gradually reduced to about 20,000 per square meter. Density control should be combined with rotation update. The species of boring bed, hatching bed, preliminarily young bed, and late baby bed should be constructed with an area ratio of 1:1:2:4. Combined with the expansion of the bed, the control density can be achieved. The request.
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