About white jade snail

Latin scientific name Fruticicolidae

Classification of families and genera: Chiroptera, Mollusca, Gastropoda, Snail.

There are about 22,000 kinds of snails living on land. Most of them belong to pneumogastropods, and a few belong to anterior branchials. Feed on decaying plants and lay eggs in the soil. It is most common in tropical islands (such as Cuba), but it is also found in cold regions (dormant in winter). Arboreal species are brightly colored, while terrestrial species are usually monochromatic. Achatana in Africa is the largest, exceeding 20 cm (8 inches). Several species of the genus Megasnail in Europe are often used as delicacies, especially in France. See the article about gastropods.

Snails have the most teeth in the world. Although its mouth is only the size of a needle tip, it has 25,600 teeth. There is a small hole in the middle of the snail's small antenna, which is its mouth. There is a serrated tongue inside, which scientists call "toothed tongue".

Snail is not a biological classification name. Generally speaking, what does it mean? ? ? ? All kinds of animals in the family, also broadly including some animals in other families of Gastropoda (including slugs, etc. ) There is no distinction between aquatic snails and terrestrial snails in general western languages. In Chinese, snails only refer to terrestrial species, although they also include many animals of different families and genera, but they are similar in shape. Snails have a relatively fragile low conical shell. Different kinds of shells are left-handed and right-handed, with obvious heads. There are two pairs of antennae in the head, the last pair of longer antennae has eyes at the top, and the ventral surface has a flat and wide abdominal foot, which moves slowly, secretes mucus under the soles of the feet, reduces friction and helps walking, and mucus can also prevent the invasion of general insects such as ants. Snails generally live in wet places and hide in plants to avoid the sun. Snails living in cold regions hibernate, and species living in tropical regions hibernate in dry seasons. The mucus secreted by them during hibernation will form a dry film to close the shell mouth, and the whole body will be hidden in the shell until the temperature and humidity are suitable. Snails are distributed almost all over the world, and different kinds of snails have different sizes. African snails can be as long as 30 cm, while northern wild species are generally less than 1 cm. Snails generally feed on leaves and buds of plants, so they are an agricultural pest. But there are also carnivorous snails that feed on other kinds of snails. Now this kind of artificially bred edible snail has spread all over the world with French cooking. Snails are hermaphroditic, some species can reproduce independently, but most species need two individuals to mate and exchange sperm with each other. Ordinary snails lay eggs in wet soil, and usually after two to four weeks, small snails will break out of the ground. It can lay 100 eggs at a time. Snails have many natural enemies, such as chickens, ducks, birds, toads, turtles, snakes, hedgehogs and so on. Fireflies mainly feed on snails. Snails can generally live for 2-3 years, up to 7 years at the longest, but most of them may become food for other animals in that year. Snails have different symbolic meanings in different cultures. In China, snails symbolize slowness and backwardness. In western Europe, it symbolizes tenacity and perseverance; Some people predict the weather by the action of snails. Finns believe that if snails have long tentacles, it means good weather tomorrow.

Snails have high edible and medicinal value. Rich in nutrition and delicious, it is an advanced nutritional tonic with high protein, low fat and low cholesterol and rich in more than 20 kinds of amino acids. Snails belong to Gastropoda terrestrial mollusks, and there are many kinds in the world. According to relevant data, there are 40,000 species of snails in the world. Snails are distributed in all provinces and regions of China, living in forests, shrubs, orchards, vegetable gardens, farmland, houses, parks, gardens, temples, mountains, plains, hills and other places. However, there are few species with feeding and edible value. Snail, as a kind of human food and animal protein feed with high protein and low fat, has attracted more and more attention.

Snails are one of the most common mollusks on land. It mainly feeds on plants, especially the fine buds and young leaves of crops, so wild snails are harmful to crops. With the development of science, people turn harm into benefit and raise snails artificially, so that snails can provide human beings with snail meat with high nutritional value.

Edit the shape characteristics of this paragraph.

The whole body of snail includes shell, head, neck, shell membrane, feet, viscera, capsule and other parts. The spiral shell on its back has various shapes and sizes, such as pagoda, gyro, cone, sphere, pipe and so on. At present, white jade snail, covered snail, scattered snail, open snail and brown cloud agate snail all have their own unique shapes.

Edit this breath

The mantle cavity of a snail will form 1 openings at the mouth of the shell, which are called "breathing holes" and are places where gas enters and exits. Careful observation shows that the breathing hole is often opened and closed, just like the "nose" used by snails to breathe; When the snail retracts into the shell, it still leaves the opening of the breathing hole at the shell mouth for breathing. The mantle is often located between the feet or visceral masses, forming a 1 cavity communicating with the outside world, which is called "mantle cavity". Snail's respiratory organs are hidden in the sleeve cavity, sometimes through the snail's shell, you can vaguely see the dense pulmonary vascular network under the shell, mostly located in the front side, near the head, that is, the position of the sleeve cavity.

Edit the living habits of this paragraph.

Snails like to live in a dark, humid, loose and humus-rich environment, most afraid of direct sunlight and sensitive to environmental reactions. Their most suitable environment: the temperature is 16 ~ 30℃ (the fastest growth occurs at 23 ~ 30℃); Air humidity 60% ~ 90%; The humidity of the feeding soil is about 40%; The pH value is 5 ~ 7. When the temperature is lower than 15℃, it will hibernate when it is higher than 33℃, and it may freeze or heat to death when it is lower than 5℃ or higher than 40℃.

I like to burrow into loose humus soil to inhabit, lay eggs, adjust the humidity in my body and absorb some nutrients for up to 12 hours. Omnivorous food and partial eclipse coexist. Love humidity, fear flooding. Snails have a good appetite when they eat wet food on wet nights. But floods will suffocate snails. Self-sufficiency. As soon as the little snail hatches, it crawls to eat without mother's care. When invaded by the enemy, its head and feet retract into the shell, secreting mucus to seal the mouth of the shell; When the shell is damaged and fails, it can secrete some substances to repair the body and the shell. Have great patience. Snails have amazing viability and strong cold, heat, hunger and drought tolerance. For example, constant temperature farming. The temperature is constant between 25 ~ 28℃, and the growth, development and reproduction are vigorous.

Edit the feeding habits of snails in this paragraph.

Snails eat a wide range of food, mainly vegetables, weeds and melon skin; Leaves, stems, buds, flowers and juicy fruits of crops; Eat all kinds of grass and green tree feed, juicy feed, bran feed and cake feed.

Edit the four issues of this snail.

1) Incubation period: refers to the period from laying eggs to hatching of snails.

2) Juvenile snail stage: Juvenile snail refers to the snail stage within 30 days after hatching.

3) Oncomelania stage: When the young snail reaches the age of 1 ~ 6 months, this 5-month-old snail is called Oncomelania stage. This is a period between young snails and seed snails. Snails are at this stage of growth and development (individual expansion) and reproductive growth (growth and development of sexual organs).

4) Oncomelania period: Oncomelania snails that have grown for more than 6 months.

Reproductive characteristics of snails

Two snails meet, touch each other with their antennae, then their heads are opposite, their bodies are connected, and the reproductive cavity is connected. After this pause for a moment, the reproductive parts suddenly reverse, and the carrier of love (penis) is inserted into each other's reproductive holes. Generally speaking, the mating time of snails is very long, which takes about 2-3 hours each time, sometimes as long as 4 hours.

After mating, fertilized eggs are produced in vitro through reproductive pores. Eggs are laid in soil several millimeters deep underground, or under rotten wood and fallen leaves. Snail larvae develop in eggshells, and the hatched larvae have become snails.

1. Snails are hermaphroditic, cross and both sexes lay eggs. The snail itself is both a father and a mother. Two snails cooperate with each other, and both sides repeatedly stimulate each other's reproductive holes with love arrows (penises). After a fierce stab wound, both penises are inserted into each other's vagina to ejaculate. 10 day after conception, both parties can lay eggs, and eggs can hatch into snails after 8 days.

2. Long mating time, slow spawning speed and great difficulty. The mating time of estrus snails is as long as 2 ~ 3 hours, and some of them are as long as 6 hours or more. Snails can lay 2 eggs per minute, and each spawning time is as long as 1 ~ 2 hours, and some of them are more than 3 hours. Snails often die from poor food intake, collapse and dystocia when laying eggs. Some of them died in dystocia, accounting for about 30% of the total number of snails.

3. High reproduction rate. Each snail can lay eggs 6-7 times a year, with an average of 200 eggs each time. Snails weighing 35g can lay 120 eggs at a time, and snails weighing 40-50g can lay 150- 180 eggs at a time. Snails weighing 60 ~ 100g can lay 300 ~ 400 eggs at a time.

The reproduction of snails is not limited by age. Under the same suitable breeding conditions, the bigger the snail, the more eggs it lays.

5. Short service life. The life span of snails is generally 5-6 years. Under uncomfortable living conditions, it will accelerate the death of snails and shorten their life span.

6. Three slowness, two quickness, one difficulty and one more. Three slowness means slow action, slow mating and slow spawning; Second, fast growth and fast shell contraction; It is difficult to lay many eggs when it is difficult.

Edit the species of snails in this paragraph.

Snails are mollusks of terrestrial shellfish. Snails have lived on the earth since ancient times. There are many kinds of snails, about 25,000 species, all over the world, including thousands in China alone. Most snails are poisonous and inedible. There are about 1 1 species with edible value in China, such as brown agate snail, high-ringed snail, Hainan hard snail, wrinkled hard snail, Jiangxi Ba snail, Marba snail and white jade snail. At present, there are mainly three kinds of snails used for food and artificial breeding in the world:

French snail

Also known as grape snail, it is named because it mainly lives in grape plantations and feeds on grape stems, leaves, buds and fruits. Because it looks like an apple, it is also called an apple snail, and its scientific name is a snail. Bright snail varieties are produced in France, Italy, the former Soviet Union and other countries. The adaptation limits of temperature and loose snails are basically the same. The weight of this variety can reach 400g g.

Shells are spherical, with a height of 28~35mm and a width of 45~60mm. The shell is thick, solid and opaque, with 5.0~5.5 spiral layers, and the spiral part grows slowly and shows a low cone shape. The spiral layer is enlarged, the shell mouth is not inclined downward, and the shell surface is dark yellow-brown or yellow-brown, shiny, with many dark brown bands. The top of the shell is blunt and round, and the adult umbilical foramen is covered by the axial lip. The shell mouth is oval, the mouth edge is sharp, the lips are turned outwards, and the endoplasm is light yellow or light brown.

Walking snail

It is a "Halix" snail, native to France, Britain and other regions in Central and Western Europe. It usually lives in gardens or bushes, so it is called "garden snail", also called loose snail. Adult snails are slightly smaller, about 3 cm in diameter. Snail shell is thin and yellow-brown, with four purple-brown stripes, and its surface is covered with many yellow-brown spots. At present, the cultured snails in China are small and have poor economic benefits due to the variety degradation.

Agate snail

People in Taiwan Province province call it dewdrop snail, and in Guangdong area it is called East snail, vegetable snail or flower snail, which belongs to agate snail. Agate snails originated in Madagascar in East Africa and later spread all over the tropics. It is the largest snail in the world, so it is also called African snail. The shape of a snail is conical, and the surface of the snail shell is covered with a yellowish brown shell with dark brown patterns. Usually, the shell of an adult snail is about 6 ~ 8 cm long, 3 ~ 4 cm wide and weighs more than 50 grams. In West Africa, especially on the Gold Coast, people regard snails as the only animal, protein. Because this kind of snail tastes delicious and is welcomed by European and American bosses, it makes the African giant snail become the staple food snail in the world today. This kind of snail is a variety suitable for growing under natural conditions in China.

At present, the widely cultivated variety in China is called white snail, which is named after its white color. It belongs to mollusks, gastropods and terrestrial shellfish. Androgyny is the best of all the edible snails in the world. White jade snail is one of the unique animals in China. It has special value, special nutrition, special flavor and special uses. It has delicious meat, rich nutrition, high protein and low fat, and is rich in more than 20 kinds of amino acids. It is also the best tonic for astronauts and athletes.

It belongs to the variation variety of agate snail. Its uniqueness lies in the different muscle colors of its head, neck and feet, but it is not different from the brown cloud agate snail in shape and living habits, and its culture method is basically the same, but it requires higher sanitary conditions and higher export economic value.

Harm and prevention of snails in this section

Snails of the same type will take citrus fruit trees as their hosts, and citrus leaves are often eaten by them, and the cortex of branches is often eaten by them, and citrus fruits form pits after eating. Its host plants include saplings, vegetables and flowers.

Snails are harmful to soybean seedlings, causing damage to leaves and stems, delaying the development of stiff seedlings and reducing the seedling rate. In severe cases, all bean sprouts are eaten up, resulting in aseptic slicing. Comprehensive measures should be taken to control snails in soybean fields.

1) Cleaning the countryside: After crops or vegetables are harvested in summer, weeds in fields, ridges and ditches should be eradicated in time, furrows should be opened to reduce humidity, and intertillage and turn over the soil, which will worsen the growth and reproduction environment of Oncomelania snails.

2) Oncomelania: Oncomelania should be killed in time in late spring and early summer, especially before the snail breeding peak in May and June. First, chickens and ducks feed snails, and pay attention when not using pesticides. The second is to pick up snails manually. When working in the field, snails are picked up, or they are lured by grass and vegetables, or they are specially picked up manually. This can get twice the result with half the effort

3) Chemical control aims to protect the emergence of soybean. When the population of Oncomelania hupensis is large and is about to enter the initial stage of harm, chemical agents are used to control Oncomelania hupensis. 300 g paraformaldehyde, 50 g sucrose, 300 g 5% calcium arsenate and 400 g rice bran (first fried in a pot) are mixed into soybean-sized particles; Use 0.5 ~ 0.6 kg of 6% Mida molluscicide or 3% Miwoling granules 1.5 ~ 3 kg per mu, mix with 10 ~ 15 kg of fine soil and scatter in the field. Ditches and wetlands that snails like to inhabit should be properly replanted to minimize the harm of snails.

Edit the medicinal value of this snail.

There is a record in Compendium of Materia Medica that snails are used to treat diseases. Modern Chinese medicine also recognizes that snails have the functions of clearing away heat and toxic materials, reducing swelling, treating and quenching thirst. It can be used for adjuvant treatment of diabetes, hypertension, hyperlipidemia, tracheitis, prostatitis, malignant ulcer and cancer. Efficacy; Treatment of swelling and pain, anal contraction, diuresis, application and indications: treatment of swelling and toxin; Start treating sores; Treat diseases; Treat toothache; Recently, higher nervous activity and neurophysiology of Russian Academy of Sciences are trying to treat Parkinson's disease with the nerve tissue of mollusks such as snails. Parkinson's disease is caused by the gradual degeneration of substantia nigra cells in the brain and the cessation of dopamine secretion. Its main symptoms are muscle stiffness and trembling hands and feet. It is found that mammals have weak ability to reject mollusk tissues, and the researchers implanted snail nerve tissues into the brain of mice, which can be compatible for more than 6 months. After further improving the technology, Russian experts have been able to fuse the nerve tissue of snails with the brain tissue of mice with Parkinson's disease, and gradually restore the brain function of damaged mice. According to the above results, Russian experts will use the nerve tissue of mollusks to carry out experimental clinical treatment on volunteers with Parkinson's disease in the next stage of research.

Drug instruction

Alias: Tianluo Temple, Niu Lin and Guanniu.

Source: Eulota similaris Ferussac, a large snail, which is used to dry all or live individuals for medicine. Capture in summer and autumn, blanch in water and dry in the sun; If you use fresh products, grab them when you use them.

Nature and taste: salty and cold. A little poisonous.

Indications: clearing away heat and toxic materials and inducing diuresis. Used for carbuncle, furuncle, hemorrhoid, leakage and dysuria.

Usage and dosage: 0.5 ~ 1 RMB, ground into powder or taken as pills. Appropriate amount for external use, ground or mashed with fresh products, and applied to the affected area.

Excerpt: National Compilation of Chinese Herbal Medicine

Edit the edible value of snails in this paragraph.

Snail, shark's fin, scallop and abalone are four famous dishes in the world, which contain more than 20 kinds of amino acids, 10 trace elements and are rich in snail enzyme and SOD. The content of protein is higher than that of turtle, pork, beef and egg by 1,/kloc-0, 3 and 6 percentage points respectively, while the fat content is only turtle, beef and egg. The selenium content per gram of snail meat is 0.45 micrograms, which is 4.5 times that of tea. From the perspective of market capacity, snail food conforms to the new trend of naturalization, game, nutrition and health care, and has a broad market at home and abroad. At present, the annual demand for snail products in the international market is about 400,000 tons, and the United States alone needs to import 3 billion dollars of snails every year. The market price is also high. The ex-factory price of frozen snail meat in new york is equivalent to RMB 362.39/kg, and the price of a dish made of six snails is as high as 18 USD. The price of live snails in France and Spain is equivalent to RMB116.11yuan. The price of the canned white jade snail we signed for export also reached 9000 ~ 14000 USD per ton. White jade snail is a new breed cultivated in batches in China. It is tender, white and big, and it will be more competitive in the international market. In recent years, new products such as health food series, biochemical drugs series, compound nutritious drinks series, cosmetics series, canned game series and frozen meat series have been introduced. It has been successfully developed in China, and several snail drugs for treating tracheitis, prostatitis and other diseases are about to be mass-produced. Snail secretion can also be used to refine and process natural nutritional cream.

Snail is a kind of terrestrial mollusk, which has high edible, medicinal and health care values. Its edible and medicinal history has been more than 2000 years. In foreign countries, snail is one of the seven world game, ranking first among the four famous international dishes (snail, abalone, scallop and shark's fin). In France, it has the reputation of "French cuisine". In Europe and America, there are almost no snails to celebrate Christmas. In recent years, snail eating fever has risen quietly in China's coastal open cities, and snails on the market will be out of stock every holiday. Comrade Deng Xiaoping tasted snail food before his death. He praised: "Snail food fills a gap in China and should be well developed."

Snails enjoy the reputation of "soft gold" in the world. Its meat is tender, delicious and nutritious. According to the determination, every 500g of snail meat contains 90g of protein and various nutrients needed by human body, such as amino acids, vitamins, calcium, iron, copper and phosphorus. It is a food with high protein and low fat. Snails are cold and salty. It has the effects of clearing away heat, relieving swelling, detoxicating, promoting diuresis, relieving asthma and softening hard mass. It has a certain curative effect on diabetes, cough, pharyngitis, mumps, scrofula, sore pain, hemorrhoids, centipede bites and other diseases, and is praised as a delicious food and a good health care product by consumers.

Nutritional analysis

The content of protein is higher than that of beef, sheep and pork, but the fat is much lower than them, and it contains many minerals and vitamins, so it is the first choice for patients with weak constitution, malnutrition and chronic diseases. The contained enzymes can eliminate stagnation, while glutamic acid and aspartic acid can enhance the vitality of human brain cells. Scientists believe that eating more snails has nutritional and cosmetic effects on skin and hair.

Suitable crowd

1. Suitable for all ages, people with weak gastrointestinal digestion and weak body are most suitable.

2. Patients with dysuria, hemorrhoid swelling and pain, chronic sore throat and nosebleeds should eat it but not take it for a long time.

Edit this paragraph of snail's fear.

Afraid of salt and dialysis, water in the body will penetrate from the body with low salt content to the body with high salt content. Salt will make snails lose water and dehydrate to death.

According to scientists' calculations, the fastest crawling speed of snails is about 12.2 meters per hour. Nowadays, people often use snail crawling as a metaphor for slow speed.

Edit this passage about natural enemies of snails.

The most deadly natural enemy of snails is fireflies (larvae eat snails and adults lay eggs in snails). There are snails, beetles and mice. Some natural enemies that are not easy to find are parasitic bees and acaroid mites. Acaroid mites should be a kind of white worms, live in groups and feed on the body fluids and epidermal mantle of snails or slugs, which is not harmful in a short time. If it gets bigger, it should indicate the harm to snails. Take out the bones after getting up in the morning, often to reduce the parasitism of acaroid mites! The reason for this situation is that the feeding environment is not good! Even if there is no cleaning residue and excrement, or the humidity and temperature are too high.

Edit this development history of snail farming.

Snails have a long history of food and medicine in China. Snails were recorded in detail in Erya's "Free Fish" more than 2,000 years ago. In the 6th century BC, Tao Hongjing's Records of Famous Doctors recorded an example of snail treatment. In A.D. 1774, Li Shizhen of Ming Dynasty described the morphology and medicinal value of snails in detail in Compendium of Materia Medica. Since the 20th century, many scientists have made great contributions to the study of snails, especially the cultivation and application of snails, but no breakthrough has been made. Until the 1980s, the snail production and export volume in Chinese mainland were still very small, and the export volume was not as high as that in Taiwan Province Province110. However, since the late 1980s, when snails were comprehensively analyzed and tested, it was found that they contained 20 kinds of amino acids, more than 30 kinds of enzymes and blood lectins. After truly understanding the value and function of snails to human beings, the snail breeding industry has developed vigorously and gradually become a thriving household sideline in urban and rural areas of China.

At present, there are more than 20 provinces and cities such as Hebei, Guangdong, Fujian, Shanghai, Zhejiang, Hubei, Hainan, Jiangsu, Henan, Shandong, Hunan, Sichuan, Liaoning, Inner Mongolia and Gansu. There has been an upsurge in artificial breeding of snails, which is developing towards scale and industrialization. Snail farming in China is catching up with the advanced world level.

Before the birth of white jade snail, many countries mainly raised brown cloud agate snail, because brown cloud agate snail has the advantages of fast reproduction, strong disease resistance, easy feeding and the most abundant nutrition. Since the birth of white jade snail, many countries have introduced it, because it not only has all the advantages of brown cloud agate snail, but also tastes as delicious as jade. As a result, white jade snails swept the world.

The development of white jade snails in China has accelerated the reproduction and development of white jade snails. In a short time, with the joint efforts of many experts and scholars, we not only found out the living habits and reproductive laws of white jade snails, but also comprehensively tested the nutritional components of white jade snails, and developed a series of snail products according to their nutritional values, which were exported to Southeast Asia, Europe and the United States. Therefore, the breeding, development and utilization of snails can be said to be both a traditional and ancient project and an emerging high-tech project.

The research on snails abroad was later than that in China. Scholars from some European and American countries began to study snails from18th century to19th century, but their development and utilization were ahead of China. In recent years, many developing countries have used their own resources to accelerate the development of snail farming and processing industry, and made it an important export-oriented foreign exchange earning project.

Snails are rich in nutrition. The content of protein, coumarin, alkaloid, organic acid and other elements in snail meat is higher than that in soft-shelled turtle, pork and all egg foods, especially in protein, which ranks first among animals in the world. Most of its biochemical indexes are much higher than those of spirulina, and it is known as healthy food in 2 1 century. Snails are high in protein, calcium, fat and cholesterol, which are very beneficial to human health. There are more than 20 kinds of amino acids and more than 30 kinds of enzymes in their bodies, which are most needed by people but difficult to ingest from other foods. The lectin extracted from snail protein gland has great application value in blood research. The price per gram of lectin in the international market far exceeds the price of gold, so snails are known as "soft gold".

In addition, snail enzyme extracted from snails is also an important raw material for many industries, such as medicine, biology, textile, cosmetics, wine making and so on. Therefore, the commercial value of breeding snails is very considerable.

Snail is a kind of terrestrial mollusk. The common species are homotype snail, African snail, snail, Chinese white jade snail, wild agate snail, scattered snail, bright snail, brown cloud agate snail, covered snail and apple snail. Their living habits and preventive methods are similar. Snails are not all pests.

Edit this paragraph and observe it carefully.

Snails, like slugs, have long flat feet in their bellies. They move forward by muscle contraction, secrete mucus when they move forward, and glow when they dry. We can do an interesting observation experiment to measure the crawling speed of snails: put a snail on the dry ground and it moves 9- 13 cm per minute; When climbing to the shady ground, slow down and move 6-8 cm per minute; When climbing to the ground with thin water layer, the speed is accelerated and it slides 25-30 cm per minute. Some western countries hold snail races every year. 1985, Spain held a snail race, in which 68 snails from 8 countries participated. In the competition, a Spanish snail won the championship, and it ran out of 124 cm in 5 seconds.

How to edit this paragraph?

There are many kinds of snails, and more than 25,000 kinds have been found all over the world. The common edible snail in China is the African snail, also known as the brown-cloud agate snail, which is called the "famous vegetable snail" in Guangdong. Snail season is May-165438+ 10 every year. When the temperature drops in winter and it is dry and hot in summer, snails go into hibernation. Snails like the light and come out at night. During the day, most of them lurk in the dark and humid environment with overgrown weeds, lush trees and lush crops, as well as loose soil rich in humus or hide in dead branches, fallen leaves and caves. Snails often climb to the back of tree trunks, crop stems and leaves in case of dry ground or heavy rain in waterfalls.

Edit the technical points of snail culture in this paragraph.

1. temperature 16 ~ 40℃, the optimum temperature is 25℃, generally high or low. Heating must be carried out by earthworm fire path, and it should be prepared all year round, especially in late spring and early autumn, to prevent sudden flooding. Conditional heating is the best, and it is not necessary to use a stove for heating.

2. humidity. The soil surface humidity of the feeding soil should be kept at 25% ~ 35%, and the relative humidity of the air should be 85% ~ 90%, so that it can be wetted, and the top should be covered with plastic sheets for moisture control and moisturizing.

3. In order to prevent dry air and cold air from blowing in directly, double doors, cloth hanging and wind deflector should be adopted for import.

4. Resolutely control the malodorous gas entering the breeding ground.

5. Feeding soil must be controlled at pH 6.5 ~ 7.5, and it is forbidden to use polluted sand containing pesticides and chemicals.

6. The culture container must have good water permeability and air permeability.

7. Don't be exposed to bright light when not working, preferably in the dark. Lighting with 15W red bulb at night can stimulate spawning.

8. Hatching of eggs. The key to the success or failure of snail farming lies in the hatching of eggs. Indoor temperature is controlled at 20~25℃, air humidity is controlled at 90% ~ 95%, and soil surface humidity is controlled at 25% ~ 30%. Improve the method of egg collection and incubation, and adopt the 60-day snail cultivation method. This method can greatly improve the reproductive efficiency of snails, and the general hatching rate is above 95%.

9. The feeding of young snails is related to the success or failure of the rapid development of snail quantity and output, and special attention should be paid to the control of temperature and humidity. Generally, the temperature should be controlled between 25 ~ 30℃, the water content of the soil is 30% ~ 35%, and the relative humidity of the air is 80% ~ 90%. Eat more fresh and juicy feed, supplemented by calcium supplements.

10. 1~3-month-old snail culture ponds should be humidified and do not splash water. Spray with a sprayer, preferably warm water.

1 1. Remove dead snails in time.

12. It's best to kill two birds with one stone when earthworms and snails are mixed.

13. Prevent the invasion of natural enemies and kill rats and ants. Regular spraying with11000 trichlorfon solution can effectively kill the largest natural enemy mite of Oncomelania hupensis, and regularly disinfect the snail breeding ground with peracetic acid diluent to kill pathogenic microorganisms.

14. The lowest cost and best feed formula: 50% rice bran, 40% shells, 8% yeast powder and 2% others.

Species of snails

There are many kinds of snails, about 25,000 species, all over the world, including thousands in China alone.

Edit this song: Snail

Problems such as;

I saw a disgusting thing with a snail shell beside it, so I'm sure it's a snail. I used to wonder why there were so many snail shells on the ground. I'm sure they abandoned those shells instead of dying in them, because there is no white film at the mouth of the shell. What I want to ask is why snails abandon their shells and leave without them. What will they become?

Answer:

First of all, it is stated that snail shells are not only protective, but also important in winter. Snails shrink into their shells in winter and seal their exits with mucus, which can protect them from the cold.

Some "snails" have no shells, but they are not snails. They are another kind of mollusk, slug =. =

But the existence of slugs does not mean that snails can survive without shells, because they are completely two kinds of creatures. Snails have organs in their shells that protect and support them. Without shells, they won't live long, no matter how good the external conditions are.