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. The head has two pairs of antennae. The last pair of longer antennae has eyes at the top and a flat and broad abdomen on the ventral surface. They move slowly, and the soles of their feet secrete mucus to reduce friction and help them walk. 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.
1. likes dark, humid and hidden environment, and is very sensitive to strong light stimulation.
2. I like to burrow into loose humus to inhabit, lay eggs, adjust the humidity in my body and absorb some nutrients for as long as 12 hours.
3. Omnivorous food and partial eclipse coexist.
I like humidity and am afraid of flood. Snails have a good appetite when they eat wet food on wet nights. But floods will suffocate snails.
5. 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.
6. Have strong patience. Snails have amazing viability and strong cold, heat, hunger and drought tolerance.
7. I like constant temperature farming. The temperature is constant between 25 ~ 28℃, and the growth, development and reproduction are vigorous.
The meaning of life lies in running.
Life is only a few decades, or go or stop, or sink or float. Only running and pursuing can highlight the value of life. The meaning of life lies in running!
Everything in the world is endless, but our life is short. We hope to climb to the top of our dreams, but our short life can't bear the long climb. There is a mountain that we can never conquer. Should we choose to give up, disappear with depression or choose to run tirelessly?
Kang Youwei chose to give up. After the failure of the political reform, he chose to give up and retreat to foreign countries under the pursuit of the Qing army. Tan Sitong chose to run, to convey the spirit of reform with blood and to awaken people with life. His screams on the guillotine were engraved into the historical rings and echoed in the sky with a thousand years of history. Kang Youwei, who retreated, disappeared into the dust aroused by this roar.
Running life always rotates with the historical rings, while shrinking life is eroded by the wind in the passage of time and eventually disappears.
Although the scenery at the top of the mountain is beautiful, the running process is more beautiful than the scenery at the top of the mountain, because the scenery along the way is nourished by sweat and perseverance.
A moth puts out the fire until it dies. The light shining in the lampshade is its target. It wants to embrace the temperature of fire, but this is a dream that will never come true. It knows it can't do it, but not a moth has given up for thousands of years. Because the process of running and pursuing is better. Hit again and again, fly again and again, and never give up until the end of life. The short life also burns, burning more warmly and brightly than the lights on the way to running.
The water that goes upstream, although it can't touch the blue sky, at least it has been pursued; The epiphyllum that opens at night, although it can't see the dawn, is at least gorgeous; Although we sometimes don't feel the pleasure of "climbing to the top at a glance", at least we have been brave and pursuing.
If you pursue it, you won't regret running away. Some people often say, "I really regret …" and "I wish I had …". In fact, success or failure does not depend on whether you stand the highest or not, but whether you pursue and run for your dreams. Although the Revolution of 1911 did not achieve the revolutionary goal of anti-feudalism and anti-aggression, at least one generation was running for this beautiful goal. As long as it is pursued, it is meaningful. Why regret not reaching the peak? Run hard, pursue bravely, enjoy the running process, and have no regrets in a short life.
The meaning of life lies in running, and running makes life bloom more gorgeous!
Generally, Chinese cabbage, green vegetables, lettuce and other plants are fed in spring; In summer, you can feed all kinds of fruits and skins, sugar cane, sunflower leaves and so on. Feed vegetable leaves, potato chips, carrots, etc. In autumn and winter. White jade snails don't eat grass and weeds, and refuse to eat foods with peculiar smell, such as onions, ginger, garlic, leeks and mustard greens. Melons and tubers should be cut into filaments or thin slices before eating, and attention should be paid to the diversity of food to prevent partial eclipse. In order to speed up the growth and improve the spawning rate, it is best to add crushed wheat bran, rice bran, bean curd residue, yeast powder, bean powder and fish meal to the feed. Mix concentrate, such as shell powder or stone powder. Common feed formula: rice bran and bran 50%, shell powder 40%, yeast powder 8%, others (fish meal, bean powder, flour), trace elements and special additives 2%. The addition of concentrate accounts for 65,438+00% ~ 65,438+05% of the total feed. Feeding should be around 6: 00 in the evening, and feeding activities should be held at.
White jade snails like to live in a dark, humid, loose and humus environment, lying down during the day and coming out at night. It is most afraid of direct sunlight and sensitive to environmental reactions. The optimum environment is 16 ~ 30℃(23 ~ 30℃ is the fastest). Air humidity 60% ~ 90%; The humidity of the feeding soil is about 40%; The pH value is 5 ~ 7. If the temperature is lower than 15℃, it will hibernate if it is higher than 33℃, and it may freeze to death or die of heat if it is lower than 5℃ or higher than 40℃.
At present, the varieties with edible value in the world include grape cattle (also known as apple snail and French snail), brown cloud agate snail (also known as apple snail), French snail (also known as African snail) and small gray snail. The largest snail is brown cloud agate, commonly known as snail and vegetable snail. Adult snails weigh 40 to 300 grams, and the largest one weighs about 390 grams. White jade snail is a new variation variety carefully selected from Agatha. There are three kinds of snails: scattered snails, bright snails, Chinese white jade snails, Cuban colored snails, Manaus island snails, brown cloud agate snails, hairy snails and tree snails. Although snails are pests and harmful to plants, they also contribute a lot to us.
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. There are many kinds of snails: for example, some snails can jump, some snails can "swim", and it is said that there is another snail that can "travel around the world" like a spider! Unexpectedly, these humble little things are also "stunted", which is really amazing.
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:
First of all, French snails
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. Originated in Central Europe, the snail is a round snail, and the width and length of the snail shell are almost equal. Generally, the diameter of adult snails is about 4 cm, and their shells are thick, yellowish brown and have horizontal leucorrhea.
Second, garden snails.
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.
Third, agate snails.
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 the head, neck and feet, but it is no different from the brown cloud agate snail in appearance and living habits, and its breeding method is basically the same, except that the sanitary conditions are higher and its export economic value is higher.