First, dig a good supporting ditch, and build anti-escape facilities. Crabs in paddy fields must be selected from the rice fields that are convenient for entry and exit, have strong water storage capacity, and do not flood with rising water, with 2-10 acres each. Dig a circular groove about 2 meters wide and 1 meter deep around the paddy field. Several small ditches will be dug in the middle of the field, and the field will be divided into small pieces, so that the ditch will communicate. 1/3 Gully Water Peanuts, Water Hyacinths, etc. provide a good place for crabs to inhabit, feed and avoid predators. At the same time, a high standard of anti-escape facilities should be established. The height of each ridge is 30-50 cm. The inner sill is equipped with a firm nylon membrane to prevent escape and tilted 45-50 degrees inward. The inlet and outlet openings are secured with a polyethylene mesh; a field fence or bamboo fence or grid is built on the roof. Second, completely eliminate the enemy and ensure safety. Before the crabs were stocked, the frogs, water snakes, and jaundice in the paddy fields were completely removed. Before the crabs were released for 15 days, 100 kilograms of lime were mixed with water to completely kill the enemy and germs and improve the water quality conditions. Third, rational stocking and farming. Crabs were selected as early-age or immature young crabs of the same year, with uniform specifications, uniform size, robust physique, and no injuries. The stocking period is appropriate from March to May, with 3000-2000 acres of stocked stock, and 1-2 varieties of shrimp seedlings, fish fry and loach, etc., which are soaked with drugs when stocking, and prevent diseases. Fourth, scientific feeding, promote growth. Feeding adopts the method of “two fine, middle green”: that is, the crabs are stocked soon after 4-5 months. In order to improve their fitness, they are fed mainly with refined baits, and they are refined, fresh, and fine, such as feeding palatability of fish meal and rolling. Broken wheat, snails and small shrimps. During the fattening period of the crabs from September to October, concentrates were also used to improve the quality of adult crabs and the survival rate of wintering crabs. June-August is the peak season for shelling crabs. The food intake is large, mainly based on green materials. Green materials are required to account for about 70%, and proper management can account for more than 80%. Green material is mainly water plants, pumpkins and so on. Feeding 1-2 times a day, mainly at night, daily feeding amounted to 5-7% of the total amount of crabs, and adjusted according to the daily food intake. No more bait or less bait for the small number of other breeds. 5. Change water frequently to keep the water fresh. Water quality must be valued throughout the farming process. Change the water every 3-5 days from April to June, change the water every day during July and August, and change the water every three days from September to October. Each change of water accounted for 1/3-1/2 of the total amount of water in the paddy field, and based on changes in water quality, weather conditions, river crab activities, flexibility in the time and frequency of water changes. Change the water should pay attention to the water temperature can not be too large, slow water, to maintain the water level stability. Six, regular disinfection, prevention of disease. Every 15 days, 15 kilograms of lime are used as lime milk (5-10 ppm concentration) per acre, and the gutters in the paddy fields are disinfected. Regular use of oxytetracycline, multivitamins, add 8 grams per 100 kg feed, feed for 3-5 days. Prior to the crab shelling period, 2% sabinin was added to feed for 2 days. Found a small amount of crab disease, crab health, malachite green, a strong disinfectant to prevent and treat crab disease. Seventh, strengthen the prevention of enemy and anti-escape work. Rats, snakes, and frogs are the main enemies of river crabs. They must persist throughout the year and use methods such as catching, catching, and trapping to kill them. Tian Wei fixed anti-escape nets should be promptly checked. In October, some river crabs had reached sexual maturity and entered the period of reproductive migration. At this time, day and night inspections should be stepped up and anti-escape work should be well done. Eight, the choice of catching and selling season. When the late rice was harvested in November, it was also during the period of listing and arresting the crabs. At this time, the market price of crabs is generally low. The existing paddy fields can be filled with water, and the ditch water can be stored to more than 1m, and the management can be strengthened to make the crabs safe for the winter. Before and after the Spring Festival, the market price will rise and be listed again. Nine, matters needing attention. There are two things to watch out for in the process of raising crabs in rice fields. First, young crabs are best cultivated by themselves. If they are purchased from the outside, they must be carefully selected and should not be subject to old crabs and mature small crabs. Second, from August to September, crabs often suffer from shelling and incompetence. If they are improperly managed, they will die in large numbers. It should be noted that crabs should not be over-fed, and the amount of feeding should be controlled. Baits should be mainly made of green materials, and new water should be changed and fed in a timely manner. (Liang Chunzhao)

Vitamins are organic compounds and vital nutrients that an organism requires in limited amounts. An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize the compound in sufficient quantities, and it must be obtained through the diet.


Your body needs them to work properly, so you grow and develop just like you should. They are essential for the normal growth and development of a multicellular organism. Once growth and development are completed, vitamins remain essential nutrients for the healthy maintenance of the cells, tissues, and organs that make up a multicellular organism; they also enable a multicellular life form to efficiently use chemical energy provided by food it eats, and to help process the proteins, carbohydrates, and fats required for respiration.

Essential Vitamins

Antioxidant Vitamins,Natural Vitamins,Essential Vitamins,Anti Aging Vitamins

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