Choose seeds to be cautious
First of all, when buying seeds, it is necessary to purchase large-scale, large-scale, and well-recognized seed business units. Generally speaking, the seeds of normal seed production and business units, and the sealing of the business units are also more standardized, and the anti-counterfeit signs are affixed. The four quality indicators of the variety cultivation instructions and seeds are attached to the packaging bag or the packaging bag, and the four certificates are included. Complete, refers to the seed business license, seed quality certification, seed production license and business license, and in the formal unit to buy the seeds out of the quality problems can be implemented to trace the responsibility, you can minimize the loss of farmers. Second, we must pay attention to the quality of seeds. The item's luster, plumpness, purity, and mildew must be checked item by item. The two experts told the reporter that farmers need to identify the seed's quality from three aspects when buying seeds: First, identify the color. The better seed color is brighter, while the color of the Chen seed or inferior seed is relatively dark and dark. The second is to identify kernels. In general, the size and length of the seeds of the same variety and the same batch of seeds should be the same, with little difference. The third is the identification of shelling. This method is more suitable for coated seeds. Some unscrupulous dealers often cover their buyers with masks to hide the appearance of inferior seeds. At this time, a few seeds can be randomly selected from a bag of seeds for shelling to see if the seed grains are bright. If the color is bright and transparent, it proves that the seeds have stronger viability, otherwise it may be a Chen species or inferior species. Prof. Xing Hongyi pointed out that many farmers think that if they are new varieties, they must be better than old ones. Only after the demonstration of new varieties can the new varieties be determined in terms of pros and cons. If blindly expanding the planting area, the risk is extremely high. The selection of new varieties must be done through local demonstrations and certified by experts. Otherwise, old varieties with stable benefits can be selected. Prof. Yang Yinfu stressed that when selecting seeds, good seeds should not only fit the natural conditions of a region, but also suit the market conditions. For example, when purchasing high-oil corn and starch-specific corn varieties, it is necessary to consider whether there is a large-scale starch processing company in the surrounding area for special acquisition because the special maize varieties for planting industrial processing are completely dependent on leading enterprises. The number of peasant friends buying seeds also depends on the market demand. At the same time, when some unscrupulous traders sell seed directly to rural fields, farmers' friends must not be fooled into buying the fake and bad seeds. 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,Vitamin D,Folic Acid,Vitamin C Excellent Health Products Co.,Ltd. , https://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.