Breeding and management measures of Oncomelania hupensis

The management of the breeding stage of Oncomelania hupensis is related to the economic benefits of cultivating Oncomelania hupensis, so it is necessary to grasp the management of the breeding stage of Oncomelania hupensis.

1) stocking density: generally 1000 young snails are released per square meter. In addition, 5 species of silver carp and bighead carp can be raised, but there are no omnivorous and carnivorous fish. The pond surface should raise algae, water lotus, duckweed and other aquatic plants for snail consumption, shade and summer shelter and habitat.

2) Water quality: the water source of breeding snails had better be the water of unpolluted rivers and ditches, because the water of these water sources has appropriate water temperature and is rich in dissolved oxygen and natural bait. In the process of feeding and management of field snails, the water depth can be kept at 30 / 40 cm, which is generally required to change water twice a week. The suitable pH value of the pond water is 7 / 2 / 2 / 8. When the pH value is on the low side, 0.15 per square meter of quicklime is applied, 0.18 kg per square meter, once every 15 days. When the pH value is on the high side, 0 will be applied in the pool per square meter. 05-0.06 kg of dried chicken manure was applied once every 10 days for 3 consecutive times. It is strictly forbidden to apply in the field of raising snails. Pesticides, or water sources with pesticides flow to people.

3) breeding and management of field snail topdressing: for newly built culture ponds, 100-150 kg of mature compost can be applied in every 100 square meters of ponds to improve the soil. The practice of composting is to pile straw, quicklime and chicken manure alternately on the land, seal them with plastic film and use them after fully ripening. In the process of snail culture, it is necessary to apply certain farm manure to propagate plankton according to the water quality, so as to ensure that the snail can always have sufficient natural bait.

4) Anti-escape: the snail has the habit of escaping over the water, so it is necessary to maintain the anti-escape equipment in and out of the nozzle frequently.

5) breeding and management of field snails to prevent natural enemies: do not mix with omnivorous and carnivorous fish such as carp and herring in the pond, so as not to harm the field snails. Birds, cats, rats, moles and other animals will eat or harm field snails. Measures should be taken to prevent their harm. (6) breeding and management of field snails fishing: after one year of careful breeding, individuals can reach more than 10 grams. It can be caught in dry ponds, while individual large field snails are selected for parent snail cultivation.