1. Loach culture: After heightening and widening the rice field, dig buffer pools and ponds in the rice field, disinfect and fertilize, and put 30-40 loaches per square meter with specifications of 5-8g/ tail. After eating normally, the loach is fed once a day, and the feeding amount is 5% of the loach's weight. 2. Snail culture: heightening and widening the paddy field, then sterilizing and fertilizing, and then stocking 5000- 10000 snails per mu of paddy field.

First, how to cultivate loach snails in rice fields

1, loach culture in rice field

(1) rice field transformation

① Paddy fields with sufficient water, good irrigation and drainage performance, sufficient sunshine and warm ventilation are selected for cultivation, and clay is the suitable soil.

② The height and width of the water ridge are about 40-50cm and 50cm respectively. A drainage ditch and a water inlet are arranged in the paddy field, and escape prevention facilities are installed at the drainage ditch and the water inlet.

③ Dig a buffer zone at the water inlet, with an area of about 4 square meters and a depth of about 60cm.

(4) Dig a paddock in the middle of the paddy field, with an area of about 6% of the paddy field. The inside of the paddock is trapezoidal, with the middle depth of 1.5m, and the two ends are slightly higher than the middle, about 80cm. The diversion ditch is cross-shaped, extending from the center of the pond to the periphery of the embankment to the position of 3m.

(2) breeding loach varieties

(1) Drain the water in the rice field, air it for about 3-4 days, then sprinkle 120- 150kg rice bran per mu, apply 300kg decomposed organic fertilizer the next day, then store the water in the rice field to about 15-30cm, and add loach seeds.

② Put loach species about 7- 10 days after transplanting, and put 30-40 loaches per square meter with a specification of 5-8g/ tail. If it is double-cropping rice, loach species should be put in after the second transplanting.

③ The released loach shall be free from damage, health and abnormality.

(3) Feeding

(1) Feed made of rice bran and silkworm chrysalis powder is put in the first week, and it is fed every 3-4 days.

(2) After eating normally, the loach is fed once a day, the feeding amount is about 5% of the loach's weight, and the feeding feed can be a mixed feed made of wheat bran, bean dregs, earthworms and the like.

3 Misgurnus anguillicaudatus is used to foraging at night, so the feeding time is generally chosen in the evening. At this time, the water temperature is warmer and the Misgurnus anguillicaudatus is more active, which is conducive to one-time feeding.

(4) When fertilizing and applying pesticides in rainy days or paddy fields, no feeding is required.

(4) management

(1) When the paddy water is black, or the color is too thick, the water quality is too fat, or the temperature exceeds 30℃, fresh water should be injected in time to ensure that the water depth of the paddy field is about 6cm.

(2) In spring and autumn, shallow irrigation. In summer, it deepens.

(3) when it rains heavily, check the escape prevention facilities in time to avoid loach escape.

2. Breeding snails in rice fields

(1) rice field transformation

① Paddy fields with sufficient water, good water quality, good irrigation and drainage performance and sunny and leeward are selected for farming.

(2) Raise and widen the ridge to more than 50 cm.

③ A water inlet and a water outlet are arranged in the paddy field, and escape prevention facilities are arranged at the water inlet and the water outlet.

(4) Cross-shaped or well-shaped ditches are dug in the rice fields, and the depth and width of the ditches are about 30-40cm.

⑤ Dig a square or rectangular snail pit on the edge of the ridge, and the water storage depth is about 60-80cm, accounting for about 10% of the paddy field.

⑥ Before transforming paddy fields, 50 kilograms of quicklime slurry was applied to each acre of paddy fields for disinfection, and then 300-500 kilograms of decomposed pig manure or cow dung was applied to each acre of paddy fields.

(2) stocking snails

(1) The released snails should be large and have a complete shell surface, so it is advisable to shrink into the shell quickly when frightened.

(2) During March-10, in batches or once, try to avoid the hot season.

③ Stocking 5000- 10000 Oncomelania snails per mu of paddy field, with specifications above 10g.

(3) Feeding

① The main foods that can be used for feeding are rice bran, vegetable cake, wheat bran, bean dregs, duckweed, vegetable leaves and animal leftovers.

② When the water temperature is lower than 15℃, there is no need to feed. When the water temperature is 20-28℃, it is necessary to feed a lot of feed once a day in the morning or at night.

③ Feeding should be carried out in multiple locations, and the feeding locations should be fixed and evenly distributed in the field.

④ The food intake should be adjusted according to the snail's food intake.

⑤ When snails give birth, the feed particles should be very fine, and eggs or turtle feed should be mixed into the feed.

(4) management

① The water quality of paddy field is required to be rich in plankton, with dissolved oxygen above 3.5mg/L and water depth of about 10cm. If the water temperature is too high or too low, it can be adjusted by adjusting the water depth.

② Regular topdressing. According to the difference of water quality, 50- 100kg of organic fertilizer or 0.5- 1kg of chemical fertilizer should be applied per mu of land.

(3) When the water body is short of oxygen or the water temperature is too high, fresh water is injected in time, and the water exchange rate is about one quarter to one half each time.

(4) In summer, water is changed frequently. In early spring and late autumn, the number of water changes is less.

⑤ When it rains, check the escape prevention facilities to prevent snails from escaping.

Second, what do snails eat to grow up?

1. The feeding habits of river snails are quite miscellaneous. In the wild, they mainly feed on tender stems and leaves of aquatic plants, algae, bacteria, organic debris and plankton.

2. If snails are raised artificially, it is necessary to apply an appropriate amount of organic fertilizer to cultivate plankton to provide food for snails. In addition, you can also feed vegetables, rice bran, duckweed, bean dregs, wheat bran, fish offal, vegetable cakes, bean cakes and so on. Among them, fish viscera needs to be chopped and mixed with rice bran and other feeds before feeding, while vegetable cakes and bean cakes need to be soaked until they become soft before feeding.