With the increase in the consumption of quail meat in Shanghai and Guangzhou, and in particular the development of new uses of Chinese herbal medicines such as wolfberry and glutinous rice in recent years, the market demand for wolfberry has increased dramatically. In order to meet the needs of the society and protect the wild earthworm resources, some farms with advanced consciousness in China have begun the research on the artificial rearing technology and have succeeded in its key technology, the overwintering technology. For example, the scientific and technical personnel of the Yuanhua Association of Science and Technology in Haining City, Zhejiang Province not only allowed the cormorants to safely pass through the winter, but also enabled the cormorants to begin their decontamination work immediately after winter. The technology is introduced as follows:
First, the autumn intensive feeding
As the pupa is a temperature-changing animal, each year from late autumn to early spring, it is a hibernation period. If the autumn food is lacking and the nutrition does not keep up, it often leads to the death of the baboon due to lack of strength after the spring. He likes to eat small animals and ignores the static things. Therefore, in October of each year, bean dregs, pigs and sheep's blood should be mixed and put into containers for natural fermentation, which will induce fly spawning. After 5 days to 6 days, the mites will be hatched in large numbers and climb out of the vessels. , Ren Ren self-feeding. At the same time, a few lanterns can be turned on at night in the breeding farms to attract insects to gather and feed from the earthworms to supplement the food and make them strong before winter.
Second, winter protection
Every year around November of this year, the water temperature is around 10°C to 12°C, and the eel is in the hibernation period. It does not eat or drink, and it moves slowly. At this time, the crickets that had originally been active in the drylands had to go into the water for the winter. Underwater wintering measures are mainly the following:
Outdoor winter
Before the winter, several ditches are excavated in the middle of the farm or in the surrounding area. The total area of ​​the ditch accounts for 10% to 20% of the site area. The ditch is filled with water of 30 cm to 100 cm in depth, and the north should be deeper. Ten to 30 cockroaches are stocked per square meter of water area. If icing is found during the severe winter season, the ice should be broken in the morning in order to facilitate the dissolution of oxygen into the water, and no ice suffocation will result in death.
2. Indoor wintering
Use cylinders, pots, buckets to add water to a depth of 20 cm, and then put in the pot. Indoor wintering should prevent the room temperature from being too high, resulting in insufficient hibernation to keep the water temperature at about 1°C to 8°C.
3. If you have conditions, you can also use plastic film greenhouse winter
Keep the temperature in the shed at 1°C to 10°C during winter. However, when the weather is fine, the temperature in the shed at noon should be kept too high. Attention should be paid to timely ventilation.
Whether it is wintering in outdoor or indoor areas and greenhouses, it is necessary to prevent the leakage of culture ponds. Regular inspections are required in the management and replenishment of water should be promptly discovered. If there is no water leakage and the water does not deteriorate, it is not necessary to change the water throughout the winter.
Before entering the water for wintering, the water and the pot should be sprayed and disinfected with a 1/10000 bleach solution to prevent germ invasion. During the winter, it is also necessary to prevent the water mouse, otters and other predators from eating food. In spring, when the average daily temperature rises above 10°C, the oysters spawn themselves in the water. At this point, the nets were used to remove the eggs and hatched in the hatchery. At the same time overwintering crickets also gradually climbed the shore to find food, the end of the winter.
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