Sweet potatoes are rich in nutrients and have received increasing attention as health foods and functional foods. The consumption demand and industrial demand of sweet potatoes are showing a rising trend. In recent years, the economic benefits of planting sweet potatoes have been significantly better than other crops. The income of farmers with storage conditions is even more impressive. How to choose sweet potato varieties plays a key role in sweet potato sales and processing. First, edible and edible processed varieties These varieties require high sugar content, red to yellow potato meat, mature early, resistant storage, potato shape appearance, dry matter rate, crude fiber, good taste, suitable for fresh food and cooking . There are varieties of sweet potato 4, Su potato 8, Shanxiong 431, Xushu 23. Baked and potato chips French fries processing varieties require a slightly lower dry matter content, high sugar and pectin content, bright color of the finished product, texture is transparent and flexible, taste sweet and soft, suitable varieties are Beijing 553, Sushu 8, Yufeng, etc. . Second, starch processing varieties require potato white to pale yellow, high dry rate, high starch content, good starch processing quality. Suitable varieties include yam 98, yam and yam 99, Xushu 18, Luxuan 1 and Xushu 22. Third, purple sweet potato varieties. Purple sweet potato is rich in anthocyanins, and its trace element selenium content is high and its anticancer activity is strong. The study of sweet potato in our country started late and the yield level was low, but the market price was higher. The high-pigmented varieties (30 or more in color value) with slightly bitter taste can be used to extract natural pigments, such as tobacco 176 and tobacco 337; the slightly lower pigment content can produce health fresh potatoes and food additives. There are Guangshu 35, Xu Zi 1, Jishu 18 and so on. Fourth, high carotene varieties Red heart varieties are rich in carotene, 100 grams of fresh potatoes can reach 15 mg or more. This variety can be used to directly eat and extract natural carotene. Natural carotene extracted from sweet potato can be used as a food additive and also as a chemical raw material. Suitable varieties are rock potato 5, Xu 22-5, Victoria and so on. Fifth, dishes with varieties of vegetables with sweet potato is a new species developed in recent years, mainly to eat the shoots above the shoots of young leaves. The sweet-stemmed shoots contain a lot of protein, fat, dietary fiber, minerals, and vitamins. Special varieties require high vitamin content and mineral content in stems and leaves, strong branching force, high yield in the tip of the petiole, no bitterness, no odor, less crude fiber, good color, and a young shoot tip, no fluff, and delicious taste. Hot stir-fry shabu-shabu. Such varieties are Tainong 71, Qishu 53, Shangshu 19 and so on. The open field began to harvest 30 days later and 10 days for 1 time. The yield per mu was 1,000 kg and the value was 3,000 yuan. At the same time, 500 to 1,000 kg of potato can be harvested. Six, mini-potato varieties are emerging varieties of fresh sweet-smelling characteristics of sweet potato varieties, suitable for microwave baking or cooking, eating convenient, nutritious, deeply loved by consumers. The economic benefits of mini-sweet potato are significantly higher than that of ordinary sweet potato. The quality of the product is improved through quality packaging, and its price is 3 to 6 times higher than that of ordinary sweet potato. The requirements for mini-sweet potato are that the roots of the individual plants are large and small, and the weight of the individual pieces is 50-150 g. The appearance is smooth, beautiful, and the shape of the potato is good. The texture is delicate, the fiber is small, the taste is good, the pests and diseases are protected, the precocity is good, and the storage is resistant. Suitable varieties are yam 4 potato, yam potato 98, yam potato 71, jishi 18 and so on. VII. Medicinal Sweet Potato Varieties China's “Simon 1†imported from Brazil has high medicinal value, high content of flavonoids and polysaccharide mucin in stems and leaves, vitamin K and porphyrin iron called blood gold. Leukemia has a definite curative effect, but it also has anti-cancer hypoglycemic effect. The variety is seriously degraded and the yield is extremely low. In addition, sweet potato itself has the characteristics of unlimited growth, there is no obvious maturity period, when the commodity potato rate reaches 60% to 70%, it can be harvested according to market conditions. Through mulching cultivation on protected land, the yield can be increased by about 10%, and the harvesting period can be advanced by one month. The early maturity varieties include yam 4 and Xiong 431, Longshu 9 and yam 6-8. Different soil conditions are suitable for different types of cultivars. For the land with good water and fertilizer conditions, select some varieties that are resistant to water and fertilizers and have a high yield potential, such as: yamshu 4th, yamshu 99, and Xinong 431; Glutinous varieties such as Beijing 553, Xushu 18, Sushu No. 8 and yams 6-8.
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