Abstract: Field snails are common snails and are widely distributed in freshwater lakes, reservoirs, rice fields, ponds and ditches throughout my country. Because of its tender meat, delicious taste and rich nutrition, it has become one of people's favorite aquatic products. my country's field snail farming technology and scale are also constantly improving and expanding. Do you know how many kilograms of field snail farming can be produced per acre? Let’s find out together below. 1. What conditions are needed for snail farming

1. Selection of breeding sites

The snail breeding site should take into account transportation, water conservancy, soil quality and other conditions: (1) It is not free from pesticides and chemical fertilizers (2) Convenient water conservancy; (3) The soil is humus soil; (4) Convenient transportation.

It is best to choose a place with mountains on three sides, on both sides of a stream or around a lotus root pond. The water source is required to be convenient, and it is best to have micro-flowing water injected regularly. In places with humus soil, there is abundant natural food, which provides the organic fertilizer needed for the growth of field snails, so less feed can be used; chicken, pig, and cow manure can also be added to improve the soil; sectioned straw can also be added to make it rotten Improve soil quality. Soil containing more sulfur or iron is not suitable for farming snails.

2. Design of the breeding farm

The water level in the waters where snails are cultivated should be maintained at 20 to 50 centimeters. Since the water temperature easily rises, resulting in a lack of oxygen, after April, water flow should be used to adjust the water temperature and increase the oxygen content in the water. In order to promote the flow of water, attention should be paid to the design of water inlets and drainage outlets, and wire mesh should be installed at each water outlet to prevent snails from escaping with the water. If spring water or well water is used for breeding field snails, since the oxygen content in it is low, it will be directly injected into the breeding site, which is unfavorable for the growth and reproduction of field snails, so oxygenation measures must be taken). Snail farming can be combined with rice planting. Choose a swamp field where the water does not dry out and is moist throughout the year. As long as no pesticides or chemical fertilizers are used, the natural water quality is a good environment for snails to grow and reproduce, and no other feed is needed. In rice fields, The organic matter is enough for the growth of snails, but the water cannot be drained and mechanically operated, and weeds must be removed.

2. Field snail breeding cycle

The growth cycle of a batch of snails from planting to harvesting is about 4 months. Three batches can be harvested a year, and each batch can harvest 2,000 -3,000 kilograms. In one year, you can receive an average of about 8,000 kilograms. Calculated at 4 yuan/jin, the income from snails alone is more than 30,000 yuan.

3. Snail breeding technology

1. Pond cleaning

After the pond is selected, the fish pond cleaning work must be carried out, and the pond ridge must be well prepared and cleaned. If there is too much silt, especially the silt at the foot of the beach, it is best to carry out mud suction treatment if conditions permit.

2. Pond disinfection

The use of clear ponds is completely prohibited. Generally, it can be used for disinfection, but quicklime is the best. The dosage is 100-150kg of water (30-50cm). /mu, 50-75kg/mu without water. Quicklime pond clearing has the following benefits: ① Increases PH value; ② Increases Ca content; ③ can adjust water quality; ④ can sterilize.

3. Snail species selection

①Appearance requirements: The snail tip is short and enlarged, the chitin is slightly spiny, and the shell is slightly red; ②Specification requirements: 60-100 capsules/jin; ③Quality requirements: When frightened, the snail body will be quickly retracted into the shell, and there will be no disease, no injuries, and no insects.

4. Stocking time

After the medicinal properties disappear, stocking will begin in the first 15 days, which will end around March 20.

5. Stocking density

Generally, ponds are stocked at 20-30kg/acre, and it is best to stock 2-3kg per acre. The cultured snails will have particularly tender shells and thick meat. .

6. Feeding food

Generally, snails lay eggs multiple times, twice a year, one in spring and the other in autumn. Our snail breeding mainly focuses on managing a batch of snails arranged before and after Qingming Festival. The snails ovulate in batches, and they ovulate in batches when they are mature. Generally, the young snails start eating after 2-3 weeks. We can feed food at this time and cultivate summer flowers at the same time. According to the biological feeding habits of snails, snails mainly feed on phytoplankton and humus in the water (including shavings), and achieve their effects through water filtration.

Everyone knows that if there are too many snails, the water quality will become clear and even milky white, which means the water quality has deteriorated. When this happens, especially in the summer stage, the first thing to do is to change the water; the second thing is to feed more Soy milk, soybean cake milk or fermented by pouring it into the whole pond.

The principle of small amounts and multiple times should be implemented when feeding and fertilizing. If it is too much, a small amount of chip control can be used. After the cultivation of summer flowers, vegetable cakes or bean cakes are used as the best feeds. In terms of water quality management, it is necessary to keep the water quality fertilized, live and tender, fertilize according to the water, and feed according to the water.

7. Harvest fishing

Practice the principle of catching big and leaving small. During the breeding period, in order to increase the snail production, the principle of catching the big ones and leaving the small ones should be implemented. After May-June, you can first catch the big snails (seed snails). After August, you can gradually start catching standard snails. From now on, you can start catching the snails in sequence in 10-15 days depending on the growth of the snails.

8. Daily management

①Turning the pond: Check the fish eating situation every day to see if there is lack of oxygen in the water. If there is a lack of oxygen, start the oxygen pump or change the water in time. Because the oxygen content in the water is lower than 1.5mg/l, the snails will begin to die. In addition, the snails will also die if the water temperature exceeds 40°C.

②Look at the water color: Look at the quality of the water, the degree of fatness and thinness, and adjust the water quality in time.

③Disease prevention: Mainly to prevent fish diseases, try to avoid using it because copper sulfate has a killing effect on snails. Generally, quicklime and bactericidal drugs or oral drugs are used to prevent and treat fish diseases. Quicklime should be used frequently during the entire breeding process, which can not only prevent diseases but also increase Ca quality and regulate water quality. It is generally better to use it once every 15 days.

IV. Precautions for snail farming

1. Select seed snails

Most of the snails currently eaten by people are wildly bred in the natural environment. Artificial breeding of field snails can be carried out in the paddy field or pond at home. When choosing breeding snails, you should pay attention to the color. You should choose varieties that are light brown in color, have a round body and a slow tail, and have a thin shell. Mature field snails weigh about 25 grams, and can reproduce when the temperature is 15 degrees or above. Male field snails are small and pointed, while magnetic field snails are on the contrary, not only larger but also very round.

2. The living water temperature of snails

The water temperature is most suitable for snails to survive when the water temperature is 20-26°C. At this time, its appetite is strong and its food intake is large. If the water temperature rises to 30-33°C, the snail will dive into the soil to escape the heat. It will not grow if it does not eat or drink. Therefore, its meat quality will become very poor and hard, so you must pay attention to the adjustment and control of the water temperature. Below 26℃. The water for farming snails is generally about 30cm deep, but in winter, in order to ensure the water temperature, it can be lowered to 20cm. The water in the field can not only meet the survival needs of the snails, but also resist the invasion of enemies.

3. Time to stock snails

If you stock snails at the end of the first year, the breeding time of snails can be shortened, which can increase the production of the whole year. However, in order to consider its To improve survival rate, it is necessary to avoid placing when the temperature is too high. It can be delivered multiple times or all at once.

4. How to stock snails

If you want to stock snails in a natural breeding area, you can put 3 male snails and 8 female snails per square meter. If it is a separate breeding tank, 100-500 field snails can be placed per square meter. The water depth of the pool is most suitable when it is 0.8-1m, and a layer of silt of more than 10cm should be left at the bottom of the pool to facilitate snails to feed, crawl and inhabit. When releasing field snails, in order to allow them to reproduce naturally, male and female field snails can be raised at the same time.

5. Planting rice fields simultaneously

It is very convenient to raise snails while planting rice fields. It is very convenient to take care of both at the same time. However, care should be taken to avoid using pesticides, which may harm the snails. Organic fertilizers and weeds in rice fields can be eaten by snails. However, when the stocking density is high, some artificial bait may be added for feeding.

6. Polyculture with carp

It can be polycultured with 1-year-old carp species. The feed fed to the carp can be used as feed for the field snails after decomposing in the soil.

However, it is not suitable to be mixed with 2-year-old carp, so the 2-year-old carp will swallow the snail larvae. Snails can also be mixed with other aquatic animals or fish. Sometimes, in order to increase the output value of aquatic products, snails can also be used as feed for herring, turtles, and turtles.

7. Increase in output value

Snails grown in a natural environment grow very rapidly in the first 3-4 months, and then the growth rate will decrease and become slower. So much so that it stopped growing after 2 years. Therefore, when raising field snails, you must seize the opportunity and feed them enough food during the growth period to allow them to grow as quickly as possible. Such field snails will have soft, delicious and large meat, which will increase production value.

8. Catching method

The methods of catching snails include catching them with bare hands or fishing with hand nets. The size of the net is generally about 20cm in diameter, and the mesh is about 2.8cm. When fishing, some smaller snails can leak out and continue to be raised. If the area of ??the breeding pond is too large, you can use fried rice bran and some clay to knead into small balls and put them into the pond. This can attract the field snails to feed in one place and then capture them.

5. How many kilograms of snail farming can be produced per acre