Requirements of water for breeding snails

For field snail farmers, it is very necessary for them to understand the technology of field snail culture if they want to get higher profits with the least cost. in fact, field snail culture has relatively high requirements for water, and it needs to maintain micro-flow water. in order to ensure the oxygen demand of snails in the water.

Requirements of water for breeding snails

The requirement of water for snail culture needs shallow water in the pond, and the shallow water can easily raise the water temperature (especially in summer), resulting in a lack of oxygen in the pond water. Therefore, the aquaculture pond had better be able to maintain micro-flow. This requires the construction of water injection and discharge outlets, and the installation of barbed wire barriers in each nozzle to prevent snails from escaping with the current.

If the field snail is cultured with spring water or well water, some oxygen enrichment measures need to be taken to meet the water requirements of field snail culture:

1. The spring water or well water is first pumped up the water storage tower, then washed down from a high place to absorb oxygen in the air, and then poured into the culture pond.

2. Dig the water injection ditch to make the water injection fully exposed to sunlight and wind after a long process, so as to increase the contact between water and air and increase the dissolved oxygen in the water.

Field snail culture technology

1. Select sites for breeding

The snail has strong resistance, less disease, high reproduction rate, and low requirements for breeding sites. Many ditches, paddy fields and ponds in rural areas can be stocked. If it is an open pond, red duckweed, duckweed, water hyacinth and other shade can be raised on the water surface, and bamboo poles and wood strips can be inserted into the pond for field snail habitat, which can not only receive green manure on water as feed, but also raise field snail to increase income.

2. Snail collection

Field snails are mostly propagated naturally, and can be picked up from paddy fields, Zizania caduciflora and muddy water ditches or bought in the market, and then fresh snails with light brown color, thin shell and blunt body and tail can be selected as species. Generally speaking, field snails weighing 15-25 grams can reach sexual maturity and reproduce above 15 ℃. The female snail is large and round, while the male snail is small and pointed.

3. Stocking and breeding

The optimum growth temperature of field snail is 20: 25 ℃. If it is lower than 15 ℃ or higher than 30 ℃, the snail stops feeding and hibernates below 10 ℃. It can be stocked from March to November in the south of the Yangtze River. if it is stocked in the natural area, 11 species of snails can be invested per square meter (3 males and 8 females). If there is a single culture in the digging pond, there are 100,500 snails per square meter, and the water layer depth is 0.8 to 1 meter. The bottom of the pond retains a layer of silt of more than 10 centimeters, which is convenient for field snails to crawl, feed, perch and so on. Female and male snails can reproduce naturally when they are stocked together.

4. Feeding and feeding

Field snail is omnivorous, rice bran, vegetable crumbs, melon leaves, animal carcasses and commercial feed can be fed, generally to aquatic plants, soil humus, vegetables and other staple food. Fertile paddy fields, fish and snail mixed culture or water surface stocking red duckweed, green duckweed, water hyacinth and other depressions, can be little or no feed.

5. Reproduction management

The field snail is a viviparous animal. In the south, the breeding period is from April to May and from September to November every year. The female snail usually gives birth in batches. Each snail can produce 20 small snails each time. It takes 14 to 16 months for the female snail to reproduce again. The weight of the newly produced snail is 0.5 million 1.5 grams, which can reach more than 3 grams after 6 months and about 9 grams after 9 months.

6. Fishing harvest

Field snails should be selectively fished into snails when fishing, and more female snails can be harvested in batches. The water temperature is higher in midsummer and early autumn, and snails often hide in the soil and grass at noon. They must be picked in the morning and evening, and can also be picked by drainage. For every 100 female snails, the annual output can reach 100 kg.

Construction of field snail culture pond

1. Selected sites for breeding: snails have strong adaptability and few diseases. As long as a large number of pesticides and chemical fertilizers are avoided, many flat canals, beaches, pits, paddy fields, ponds and other ordinary water bodies in rural areas can be stocked.

2. Pond construction: snail culture ponds are generally 1.5 meters wide, 10-15 meters long and 30-50 cm deep. 20 cm high embankments are built between the two ponds for walking, and the bottom of the pond is covered with 10 cm thick mud. Aquatic plants such as Zizania caduciflora, asparagus, water lotus, duckweed and other aquatic plants can be sparsely planted in the pond to provide sunshade, climbing habitat and bait, so as to improve the utilization rate of snail ponds. A 60-80 cm high fence or mesh fence is built around the snail pool.

3, pond disinfection: in snail culture, it is forbidden to use pentachlorophenol sodium to clear ponds, generally using quicklime or bleaching powder to clear ponds for disinfection, but quicklime is the best, the dosage is water (water depth 30-50 cm) 100-150 kg / mu, anhydrous 50-75 kg / mu, quicklime clear ponds have the advantages of increasing PH value, increasing calcium content, regulating water quality, sterilization and so on.

The culture method of field snail

1, snail selection: field snail is mostly natural reproduction, artificial culture can be picked from paddy fields, Zizania caduciflora, muddy water ditches, or go to the market to buy, and then choose fresh snails with light brown color, thin shell and obtuse body tail as species of snails. Generally, field snails weighing 15-25 grams can reach sexual maturity, and can reproduce above 15 ℃. Female snails are large and round, while males are small and sharp.

2. Stocking time: snail species can be released not only at one time, but also in batches for many times, but to improve the survival rate, it is generally necessary to avoid the time of high temperature and heat. Of course, stocking at the end of the first year is beneficial to shorten the breeding time and increase the per unit yield of the same year.

3. Stocking method: if you put 11 species snails per square meter in the natural area, you can put 11 species snails per square meter (3 males and 8 females). If you dig a pond alone, you can put 100-500 snails per square meter, and the water depth is 0.8-1 meters. The bottom of the pond retains a layer of silt of more than 10 cm, which is convenient for snails to crawl, feed, perch, etc., and can reproduce naturally when stocking female and male snails together.

4. collocation culture: in order to regulate the water quality by raising 20-50 grams of silver carp and 5-10 bighead carps with 20-50 grams per mu, snail ponds are not suitable for raising carnivorous or carnivorous fish such as green carp, common carp, crucian carp and yellow carp.

Do not underestimate this small snail, although it is delicious to eat, but behind each delicious has paid the hard work of the breeders, as the saying goes, "every grain is the hard work of farmers." However, if you master some reasonable techniques and breeding methods, you can make farmers take a lot of detours, which saves both effort and worry.