Snail variety 2008-04- 16 0 1:52 White jade snail is commonly known as white meat snail. 1, Living Habits White jade snails, like other snails, like to live in a dark, humid, loose and decaying environment, staying up all day and going out at night, afraid of light and heat, and most afraid of direct sunlight. Very sensitive to the environment, when the humidity and temperature are not suitable, the snail will retract its body into the shell, secrete mucus to form a protective film and seal the shell mouth to overcome the interference of bad environment. When the environment is suitable, it will automatically dissolve the protective film and start activities again. Therefore, we should pay attention to the influence of temperature and humidity in the process of breeding. Suitable temperature 16℃ ~ 30℃, humidity 60% ~ 85%, soil humidity about 40%, pH 5 ~ 7. When the temperature is lower than 15℃ and higher than 35℃, it sleeps and stops growing and reproducing. 2. Feeding habits All kinds of green plants and bran can be used as food for white jade snails. Generally, broadleaf plants such as Chinese cabbage, green vegetables and lettuce are fed in spring; In summer, you can feed a lot of sugar cane, sunflower leaves, all kinds of fruits and skins, etc. In autumn, the temperature is low and the food intake is reduced. You can feed some leaves and potato chips. White jade snails do not eat grass and weeds, and refuse to eat pungent onions, leeks and garlic. 3. Breeding white jade snails is hermaphroditic and cross-fertilized. Artificial farming can breed all year round as long as the temperature and humidity are suitable. It usually takes 6 months from hatching to sexual maturity, and eggs can be laid in caves within 15 ~ 20 days after mating and fertilization. Eggs are the size of mung beans and covered with a shiny white film. Every time 100 ~ 200 eggs are laid, young snails can hatch in 8 ~ 15 days, and the life span is generally 5 ~ 6 years. 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. Brown cloud agate snail Brown cloud agate snail is also called brown cloud agate snail, African snail, flower snail, tea snail and so on. Originated in Madagascar, Africa, and later spread all over the tropical regions of the world. 1. The shell of brown cloud agate is slightly thick, shiny, oval, with a shell height of 130mm and a shell width of 54 mm, with 6.5 ~ 8.0 spiral layers. The spiral part is conical, and the body spiral layer is enlarged, and the height is about 3/4 of the shell height. At the top of the shell, the shell surface is yellowish brown or deep yellow with brown fog lines, the embryo shell is generally jade white, and other spiral layers have intermittent brown stripes. The growth line is thick and obvious, the shell mouth is oval, and the mouth edge is simple and complete. The outer lip is thin, sharp and brittle; The inner lip covers the spiral layer of the body, forming an "S"-shaped blue-and-white callus, with the axis folded outward, without umbilical holes, foot muscles, dark brown back, grayish yellow feet and colorless mucus. Second, the biological characteristics of the brown cloud agate snail like to live in dark and humid places with rich vegetation and humus. It is most active from June to September, and it is active in the morning or evening. The feeding habits are miscellaneous and large, and most of the young snails come from saprophyte. Androgyny, intermarriage; It grows rapidly and can mate and lay eggs in five months. The fecundity is strong, and the number of eggs laid at one time reaches 100 ~ 400. Long service life, up to 5 ~ 7 years. Strong resistance, will quickly enter a dormant state when encountering adverse environment, and can survive for several years in this state. Cover snail, also known as grape snail, 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. Snails are similar in shape to scattered snails, but slightly larger than scattered snails, with a maximum length of 40 grams, milky white or beige soft body and scattered eggs. Suitable temperature is 20℃ ~ 28℃, humidity is 85% ~ 90%, and sand humidity is 30% ~ 40%. Snail snail, shark's fin, scallop and abalone rank among the four famous dishes in the world. Its meat has the characteristics of high protein and low fat, and contains more than 20 kinds of amino acids and trace elements, which is very popular in the international market. The global consumption of snails is about 300,000 tons, and the United States alone needs to import 3 billion dollars of snail products every year. Snail development has been included in the national spark plan and Zhejiang spark plan. French snails are traditional snails in Europe and America. It is tender and delicious, and it is very popular all over the world. 1. The snail shell is oval or spherical in shape, slightly thick and opaque; The shell epidermis is yellow-brown, with many dark brown bands and tiny spots, and 4.5 ~ 5.0 spiral layers. The shell is 35 ~ 40mm high and 38 ~ 45mm wide. The spiral layer of shells is particularly large, and the spiral part is very short. The shell surface has obvious threads and growth lines. The shell mouth is complete and the mouth edge is sharp. Mainly distributed in western European countries and some countries in eastern Europe. Second, the characteristics of loose snails are 1, and the reproduction rate is high: under the condition of artificial feeding, loose snails can lay eggs for 3-5 times a year, up to more than 6 times, with 70-200 eggs each time, up to more than 300 eggs, and the hatching rate is over 98%. Each snail can breed more than 2 kilograms of commercial cattle every year. 2. Short production cycle: Snails grow fast, with young Niu Yi months old, growing for two months, and reaching about 10g in three months, reaching the slaughter standard. 3. Strong adaptability: Oncomelania snails can grow normally at the temperature of 12℃ ~ 30℃ as long as the soil humidity reaches about 30%, and can reproduce normally above 14℃, and there is no stress reaction during long-distance transportation. The requirements for feeding soil are not strict, there are few diseases, rough feeding resistance and good management. 4, the feeding cost is low: the food of loose snails is miscellaneous, and the roots, leaves and leftovers of various vegetables are good feeds. A snail consumes 0.5 grams of feed every day and feeds it once every two days. Bright snails are mainly distributed in Turkey, Yugoslavia and other countries. In recent years, it has been introduced to China for breeding. Bright snail is a temperate variety with large size, fresh meat and high edible value. It is the main cultured species in the world, and it is also one of the snails eaten by people in France and other western European countries. This kind of snail is easy to raise and has wide adaptability. 1. The big snail with distinct living habits likes dark and humid environment and is used to sleeping during the day and coming out at night. It is an omnivorous animal, which can tolerate low temperature. The required temperature for growth activity is 5℃ ~ 35℃, the normal temperature is 15℃ ~ 30℃, and the optimum temperature is 20℃ ~ 25℃. Dormancy begins below 5℃, death begins below 0℃, 35℃. Its growth activities need 30% ~ 40% soil humidity and 85% ~ 95% air relative humidity, and it likes to drill soil to inhabit. Stop eating when sleeping, and live without water for more than 100 days, which is suitable for artificial breeding everywhere. Second, the appearance features are distinct. Snail shells are large, thick and strong, opaque, shiny and spherical. The weight can reach 40-50g, the shell height is 2.8-3.5cm, the shell width is 4.5-6cm, and there are 5-5.5 spiral layers. The spiral part grows slowly, showing a low cone shape, the spiral layer of the body expands, and the shell mouth does not incline downward. The shell surface is dark brown or yellowish brown, with many dark brown bands, especially in the juvenile stage, with obvious threads, growth lines and wrinkles. The mouth of the shell is oval, with a sharp edge, and the mouth and lip are everted. The umbilical hole at the top of the shell is covered by the axial lip. 3. The bright snail is large in size, fresh and tender in meat, high in edible value, and its shell has great ornamental value and artistic taste. Can be processed into high-grade shell carving crafts, but also as a large number of high-grade snail craft dishes, is a collection of edible, medicinal and ornamental functions in one of the world snail treasures. This bright snail has a strong reproductive ability. Oviposition 5-8 days after mating, 3-4 times a year, each time spawning 100-350. The incubation period of eggs is 12-25 days, and the incubation temperature is about 25 degrees Celsius. The artificial culture of bright snail is simple and convenient, and its economic benefit exceeds that of other snails. /yytk 2008/blog/item/432 B4 d 0 Abe 22 af 3 bb 035 1 DCE . html