Breeding management of Oncomelania hupensis

Although the field snail is a relatively good breeding project, and its investment cost is relatively low, the number of breeding is also relatively large. Therefore, there are still many skills and techniques in the process of breeding field snails. only by reasonably mastering these skills and techniques can we effectively avoid some unnecessary risks.

Breeding and management of field snail

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 field snail culture, certain farm manure should be applied according to the water quality to propagate plankton, so as to ensure that the field snail can always have sufficient natural bait.

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

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.

The prospect of field snail culture

At present, the natural growing field snail is far from meeting the market demand, and the field snail culture grows fast and the yield is high. To cultivate field snails, first of all, do a good job in market research. Most of the field snails sold on the market are fished for sale. To put it simply, they are not profitable without cost, and they are not sold by the main owner. They are only sold incidentally, and the price of the snails caught will not be very expensive.

In addition, midnight snacks eat more snails. But relatively few people eat snails at home. The snail is not clean, so for the housewife, go to the tail to deal with the trouble. Even if the snail seller will help remove the tail, hygiene becomes a problem, one does not want to wait for him to deal with it, and second, if he orders to buy it the next day, how the customer will deal with it becomes a problem again.

Field snails generally do not go into the family to make food. To the hotel snail is also rarely used, can not be on the table. Finally flow into the midnight snack restaurant, because most people eat midnight snacks with big bacteria to eat small bacteria, small bacteria as a tonic mentality, but will not eat frequently.

So consider the sales direction and sales volume. It is best to do a local market survey and cost budget to determine whether field snail farming is feasible.

What are the nutritional requirements of cultured field snails?

1. Protein. Protein is a necessary nutrient for the growth and maintenance of life and tissue of Oncomelania hupensis. It not only constitutes its physique, but also plays a very important role as a component of enzymes and hormones. The main source of protein: protein is divided into two categories: plant protein and animal protein. Plant protein mainly comes from cereals and legumes, while animal protein mainly comes from livestock meat, poultry meat, fish, eggs and milk.

2. Fat. The main function of fat: supplying calories. Adipose tissue plays a role in regulating body temperature, preventing body temperature from spreading, and protecting internal organs. Therefore, in the process of growth and development, snails should constantly absorb a certain amount of fat from feed to meet their physiological needs.

3. Carbohydrates. The carbohydrates in the diet are mainly starch and cellulose. The main function of carbohydrates is to supply heat. Sugars are found in all nerve tissues, cells and body fluids. Carbohydrates can assist fat oxidation and promote growth and development.

4. Vitamins Vitamins are a kind of compounds necessary to maintain the normal physiological function of snails. There are many kinds of vitamins, which are usually divided into fat-soluble and water-soluble vitamins. Fat-soluble vitamins include vitamin A, vitamin D, vitamin E and vitamin K. water-soluble vitamins include B vitamins and vitamin C.

5. Energy. In order to maintain life and metabolic activities, snails must obtain energy from bait every day to meet the needs of the body. The main energy substances in feed are sugars, lipids and proteins, which release energy through the process of biological oxidation in the body and the oxidation absorbed by the Gill.

6. Inorganic salts and trace elements. Although inorganic salts and trace elements can not provide energy to the body, they are of great significance in normal life activities. they not only constitute the components of tissue, but also necessary to maintain normal physiological function. therefore, it is extremely important to meet the needs of snails for inorganic salts and trace elements. All kinds of chemical elements except ammonia, nitrogen, hydrogen and carbon are collectively called inorganic salts, in which calcium, magnesium, potassium, sodium, phosphorus, sulfur and chlorine are high, while others, such as iron, iodine, copper, zinc, manganese and cobalt, are very little. but it has a great impact on the nutrition and function of the body.

The breeding period of field snail

The first birth age of field snails is 1 year old, and they begin to reproduce when they are more than 15 ℃. Each snail produces about 20 million snails each time. The snails over 4 years old can produce 40 million snails, and those over 5 years old can produce 50 snails. The number of offspring is related to the age of snail species and environmental conditions. From the fertilized egg to the birth of the young snail, it takes about one year to conceive in the mother.

In April, field snails begin to reproduce, which makes them lively and mating frequently. When you see the female and male field snail hugging each other and turning up and down, that is the action of the field snail when mating. The sperm and eggs are fertilized at the top of the fallopian tube, and the fertilized eggs go through the blastocyst and gastrula stage, and then go through the development stage of round larvae and facet larvae, and finally develop into young snails. The embryonic development and larval development of the snail are carried out in the snail body, so the snail is oviparous.

The breeding period of field snails is the vigorous reproductive season in August. The young snails to be produced in the next year are conceived in the abdomen, and the young snails are produced from March to April of the following year, and then mated and bred in their bodies.

In the field snail population, the female snail is often more than the male snail. in the oo field snail, the female snail accounts for about 75% / 80%, while the Lixiong snail accounts for only 20% / 25%. During the reproductive season, male snails mate with females frequently, so the life span of male snails is only half that of female snails. The life span of male snails is generally only 2-3 years old, while that of female snails can reach 4-5 years old, and some female snails can reach more than 6 years old.

During the breeding period, the field snail produces 15-20 larval snails, each weighing 0.025 grams. The young snails born in the early stage can grow to 6-8 grams in that year, and reach 12-15 grams when they are engaged in breeding, especially in the first 3 months.

Through the analysis of the above editor, we can all see that the market prospect of field snail is very good, and the market demand of field snail is very large, mainly in terms of midnight snacks, as people's night life is becoming more and more abundant, especially some young people. So snail is also loved by some young people!