Yam is a very common ingredient, and it is also one of the homologous ingredients of medicine and food, and has a high nutritional value. The appearance of yam is not very good, but yam is a good health food. Regular consumption of yam is good for the body, can strengthen the spleen and stomach, promote digestion, but also lower blood sugar and prevent cardiovascular disease. There are many varieties of yam in the market, such as yam, yam, yam, yam, yam, and yam. The price is different. How to buy yam? Is yam good or fine? Which yam is best? Yam is divided into common yam and iron stick yam. The best yam variety is iron stick yam, which is produced in Henan Jiaozuo (formerly Huaiqing House). The local yam is called "Huaishan". The iron stick yam is the best in the yam. The variety is different from the vegetable yam and is shorter than the vegetable yam. Water yam This kind of yam is much thicker than the iron yam. It is more stout, but it is very well-proportioned. It is very thick from head to toe and very straight. Water yam contains large moisture and is very brittle, which is most suitable for cooking. Beef leg yam Beef leg yam, commonly known as yam. The mutton yam is the same as the water yam, but the mutton yam is not “symmetricâ€, usually it is thick and thin. The beef leg yam is more sticky and sticky, and is more suitable for cooking. Iron stick yam The iron yam is generally long but not thicker than two fingers. Unlike the rest of the yam, if the arm is round and long, the strips are slender and firm, and it is not easy to break each other (some exaggeration). The iron yam has a large "eye" and a long burr. The outer skin is darker in color and sometimes has purple spots. The head is big and small, dragging the slender tail, and sometimes the tail will occupy half the length. Method for identifying iron stick yam shape The iron yam is uniform in thickness, usually 1-3 cm in diameter (like an adult thumb), the skin color is slightly deep, uneven, the rhizome has iron red spots, the pores are relatively thin, and the skin is thin; the common yam is too thick or epidermis Too smooth, thick skin, individual pores are dense. Color The iron yam yam section is not easy to oxidize and discolor; the common yam section is easily oxidized to light yellow or yellowish brown. weight The single weight of the iron stick yam generally does not exceed 200 grams, which is four or two; too heavy may not be authentic. texture The iron bar yam texture hard to knock is not easy to break, the fiber is fine, the powdery foot, the mucus is small but the concentration is large, and the drawn silk is dense and continuous like a spider web; the common yam is brittle, easy to break, the fiber is thick, and the moisture Large, unable to draw, powder is not enough. Taste Due to the low moisture content of the iron yam, the yam polysaccharide is rich in content. Therefore, the liquid juice is thicker, and the water is not boiled for a long time. The taste is “dry and sweet†with a slight tingling; the common yam has a crisp taste and is boiled for a long time. Easy to use. National standard If the packaged iron yam has the national standard number: GB/T20351-2006, the common vegetable yam has no national standard. Fire-Fighting Equipment, DONGGUAN TENYU TECH.INC , https://www.tenyutech.com
Yam is thick or fine