Vitamins are a class of organic compounds necessary to maintain good health. This kind of substance is neither a raw material for body tissue nor a source of energy in the body, but a kind of regulating substance, which plays an important role in material metabolism. These substances are often supplied from food because they are not synthesized or are insufficiently synthesized in the body, although they are rarely needed. Vitamin Excellent Health Products Co.,Ltd. , http://www.sino-excellent.com
Vitamins, also known as vitamins, are, in popular terms, substances that sustain life, are a class of organic substances necessary to maintain human life, and are also important active substances for maintaining human health. Vitamins are low in the body, but they are indispensable. Although the chemical structures and properties of various vitamins are different, they have the following in common:
1 vitamins are present in food in the form of provitamins;
2 vitamins do not constitute a component of body tissues and cells, it does not produce energy, its role is mainly involved in the regulation of the body's metabolism;
3 Most of the vitamins, the body can not be synthesized or the amount of synthesis is insufficient, can not meet the needs of the body, must be obtained through food;
4 The human body needs a small amount of vitamins. The daily dose is usually calculated in milligrams or micrograms, but once it is lacking, it will cause the corresponding Vitamin deficiency, which will cause damage to human health;
Vitamins are different from carbohydrates, fats and proteins. They are only a small percentage of natural foods, but they are necessary for the human body. Some vitamins such as B6.K can be synthesized by bacteria in the intestines of animals, and the amount of synthesis can meet the needs of animals. Animal cells can convert tryptophan into niacin (a type B vitamin), but the amount of production is not enough; vitamin C can be synthesized by other animals except primates and guinea pigs. Plants and most microorganisms can synthesize vitamins themselves, without having to be supplied from outside the body. Many vitamins are part of a prosthetic or coenzyme.
Vitamins are some small amounts of organic compounds necessary for human and animal nutrition and growth. They are extremely important for the metabolism, growth, development and health of the body. If you lack a certain vitamin for a long time, it will cause physiological dysfunction and cause certain diseases. Generally obtained from food. There are dozens of kinds found at this stage, such as Vitamin A, vitamin B, vitamin C and so on.
Vitamins are essential organic compounds in the metabolism of the human body. The human body is like an extremely complex chemical plant, constantly carrying out various biochemical reactions. The reaction is closely related to the catalytic action of the enzyme. Enzymes must be enzymatically active in order to produce activity. Many vitamins are known to be coenzymes of enzymes or constituent molecules of coenzymes. Therefore, vitamins are important substances for maintaining and regulating the normal metabolism of the body. It can be considered that the best vitamins are in the form of "biologically active substances" and are present in human tissues.
How to Manage the Production of Greenhouse Tomatoes in Winter
Planting tomatoes is a good way for farmers to become rich, and strengthening the management of the growth period of tomatoes is the key to obtaining high yield and high efficiency. (1) Do a good job in management of growth period. Including cultivating and weeding, water conservation, arranging vines, pruning, removing old leaves, ventilation and light transmission, strengthening control of pests and diseases, and strengthening temperature management. Among them, diseases of tomatoes mainly include viral diseases, bacterial wilt, early blight, and late blight; insect pests mainly include cotton bollworm and aphids. Diseases of tomatoes can be prevented and intractable, and should be based on "defense." Virus disease prevention methods include: selection of disease-resistant varieties, seed disinfection, seedling depression, control of aphids, appropriate early planting and so on. The temperature management is to appropriately increase the ventilation of the greenhouse during the day so that the temperature inside the greenhouse can be maintained at about 25°C. The night temperature is maintained between 10-13 °C. When starting to vent, the air outlet should be small to large, ranging from small to large. After the temperature decreases in the afternoon, the air outlet will be gradually reduced or closed. (2) Do a good job of fertilizer and water management. The growth period of tomatoes generally does not require watering during the summer and autumn rainy seasons, but when the 2nd to 3rd fruits are ripe when they are dry, they should be properly watered. According to the growth of tomato plants, timely topdressing to promote fruit development, flower protection and fruit preservation. Fertilizer than tomato tomatoes, their fruit surface color sweetness output are higher than a few grades, generally as a base fertilizer can be applied to the golden baby microbial fertilizer, top dressing can be applied to the gold seedling root strong or seedling strong, if spraying gold Baby sweetening spirit will make it look more beautiful and sweet. If the deficiency of the individual greenhouses is more serious, it can be used to spray Jinbao supplements to boost the spirit (promote the growth-promoting spirit), which has a special effect. (3) timely fruit picking. Ripe tomatoes have matured, discolored, matured, and matured for four periods. Storage and preservation can be harvested during the green season. The transport can be harvested during the discoloration period (1/3 of the fruit turns red). Local sale or self-feeding should be harvested when ripe fruit is more than 1/3 red. Harvesting should be carried out gently and lightly. Picking is best done without a fruit pedicle to prevent the fruits in the shipment from being stabbed each other. Before the first frost, if there are unripe green fruits, they should be picked up and stored in the greenhouse until the fruit becomes ripe and then listed. This will not only extend the supply period, but also increase the economic benefits. In the fruit ripening period should not use hormones to stimulate fruit coloring, after selection and packing sales, its benefits are to reduce production costs, improve the quality of the fruit, but also to protect the consumer's food safety.