the content of fructooligosaccharides in yacon is 6-7% of the dry matter, which is the highest among all plants. It is also rich in minerals and trace elements such as calcium, magnesium, iron, zinc, potassium and selenium. Japanese research also found that taking 3-6g fructooligosaccharides every day can reduce the content of toxic and carcinogenic compounds in human feces by more than 4% within 3 weeks. Yacon carbohydrates are rarely absorbed by human body, so it is very suitable for diabetics and dieters. Fructooligosaccharides have the following characteristics: ① digestion and conditioning gastrointestinal tract; ② It is a growth promoter of intestinal beneficial flora, producing bifidus factor; ③ Regulate blood, clear away hyperlipidemia, and effectively control cholesterol and diabetes; (4) laxative, prevention and treatment of diarrhea; ⑤ Reduce pathogenic fire, clear away toxin, prevent and treat facial blisters and acne; ⑥ Improve immunity.
side effects: people with severe cold and bad stomach should eat carefully. Symptoms such as stomach cold and stool soup will appear after eating in large quantities. < P > It should be noted that yacon contains a chemical component-tannin, also known as tannin. After being cut and peeled, yacon turns brown when exposed to air. The reason for discoloration is that due to oxidation, the polymer of quinone produced by phenols in tannin forms brown pigment, which is melanin. In order to prevent discoloration, peeled and cut yacon can be soaked in clear water to isolate it from the air, which can prevent oxidation discoloration.
medicinal value and health-care effect of yacon
1. Regulating blood can reduce blood sugar, blood lipid and cholesterol, prevent and treat hypertension and diabetes, and also have certain curative effects on cardiovascular and cerebrovascular diseases and obesity. 2, help digestion, conditioning and improve the bad condition of the digestive system. Because yacon is rich in water-soluble dietary fiber and fructooligosaccharides with the highest content in all plants, it can significantly promote gastrointestinal peristalsis, moisten the intestines and relax the bowels, not only eliminate constipation, but also prevent diarrhea, which is the bane of gastrointestinal diseases. The most wonderful thing is that it is the proliferation factor of intestinal Bifidobacterium, which overcomes the systemic diseases caused by the imbalance in the reduction of intestinal beneficial bacteria such as Bifidobacterium due to the tight pace of life and excessive use of antibiotics, and can clear the environmental pollutants in everyone's body from food, and is a scavenger and protector of the stomach.
3. It can resist oxidation and eliminate free radicals, which can reduce or avoid the occurrence of lithiasis.
4. It has the effects of clearing away liver-heat, detoxicating, reducing fire and lowering blood pressure, and is an effective natural health care product for preventing and treating facial acne and acne. Yacon also contains more than 2 kinds of oxyacids and minerals and trace elements such as calcium, iron, potassium and selenium, which can improve human immunity if eaten regularly. It has the effect of strengthening the body, and it is also a natural strength for men to strengthen yang and enhance sexual function. Yacon is a beautiful and fashionable fruit to eat nowadays. Yacon is a rare crop, and its appearance heralds the beginning of a new era of health-care fruit, which will be in short supply in 1 years. It can make growers rich and users strong. [Edit this paragraph] The whole lotus fruit has been planted in many countries in the world, and the names of each country are different. After the introduction of China, there are also several names, such as yacon, chrysanthemum potato, Saussurea involucrata, radix ginseng fruit, Yagongji Yagong, etc. Among them, the names of Yagong and Yagong may come from the transliteration of the local name yacon. Yacon belongs to Compositae, which uses some forms of potato. We think it is more appropriate to call it "Chrysanthemum Potato" and classify it as potato and taro vegetables.
In p>1985, Saitama Prefecture in Japan was introduced successfully. In recent years, it has entered China through various channels. At present, it has been introduced and cultivated successfully in Yunnan, Fujian, Hainan, Guizhou, Hunan, Hubei, Shandong, Henan and Hebei. The production demonstration area is over 96 hectares. Products are mostly used for export, and some of them enter supermarkets. [Edit this paragraph] Cultivation techniques 1. Soil preparation and ridging: Choose the best sandy soil with convenient irrigation and drainage, apply 2,-3, kilograms of farmyard manure per mu, spread it evenly, and then plow deeply, without applying chemical fertilizer or pesticides. The row spacing is 1 meter, the plant spacing is .6 meters, and 1,111 plants are planted per mu. Before planting, furrow and ridging should be carried out, and the yacon seeds should be planted on the ridge back.
2. Planting: The planting period varies from place to place. Generally, it can be planted in spring when the ground temperature of 5cm is stable at 14-15℃. Protected cultivation can be planted in advance. The planting method can be directly planted in the field, or planted in the field after the seedlings are raised in the greenhouse with nutrition pots or bags. In summer, branches and underground sprouted lateral branches can also be planted by cutting.
third, management: after planting, when the height of the seedlings is 2cm, water them to conserve moisture, and combine with weeding to cultivate the plants. If the amount of fertilization before planting is insufficient, appropriate amount of soil miscellaneous fertilizer should be added at this stage. Be careful not to apply chemical fertilizers, pesticides and herbicides. Water the soil when it is dry, and drain it in time after the rain. When the stems grow to about 1m, tillers will be born at the base, which will break off if the fields are covered by vigorous growth.
4. Harvest of fruits: Around October, the bunchy flowers at the tip of the plant began to wither, and the leaves began to turn yellow, so the fruits began to be harvested. The south can stay in the ground for the winter, and they can be harvested and sold at any time. The north should be harvested and stored in the cellar before frost, like sweet potatoes. The stems can be used as high-quality feed, and the leaves and flowers have high nutritional value, which can be dried for tea or processed and reused. Generally, each plant produces 3 kilograms of fruits.
5. Seed-keeping: After the yacon is dug, cut off the seed balls on the upper part of the fruit, dry the wound, soak it in 1 times of potassium permanganate solution for 3 minutes, take it out and bury it in a cellar or a room free from freezing damage with wet sand, so that it can be planted next spring.
plastic film mulching and seedling transplanting technology of yacon
in order to obtain high quality and high yield of yacon, it is an effective and effective measure to improve the yield and quality of yacon by adopting plastic film mulching and seedling transplanting technology, sowing and seedling raising in advance, prolonging plant growth period, increasing light time, enhancing photosynthesis and maintaining soil temperature and humidity.
Plastic film mulching technology:
First of all, as we have explained before, we should apply foot fertilizer to water the bottom moisture, plow and level it, plan according to the row spacing of 85-1 cm, and use a small four-wheeled tractor with a 1.2-1.3-meter ridging machine to scrape the soil and furrow, with the ridge height of 2-25 cm. After the land is cleared, the film mulching time should be controlled about ten days before the frost break in the local early spring, and it should be carried out with warm head and cold tail on a calm sunny day, covering 7-8 cm of film. If you want to interplant watermelon, melon and other crops in the early spring, you can choose 1.2-1.3 m of film mulching, and you can use a four-wheeled tractor to hang the film mulching machine for film mulching if possible, or manual film mulching without conditions, which requires 6-8 people to work in line. After mulching with plastic film, drill holes to plant seeds or dig holes to plant seedlings according to the appropriate plant spacing of 45 ~ 6 cm. Pay attention to cover the film holes with soil, or plant seeds first and then cover with plastic film, so that the effect of moisture preservation and heat preservation is better.
seedling transplanting technology:
plant seedlings one and a half months in advance according to the transplanting time. Transplanting and seedling raising in spring can start at the end of February and the beginning of March, and the temperature can be raised in greenhouses or ordinary houses. Seedling raising can be divided into two types: nutrition bowl seedling raising and hotbed block seedling raising. To raise seedlings in nutrient pots, nutrient soil should be prepared first, and it is best to add a small amount of decomposed fertilizer to the fertile and germ-free soil. When the humidity is about 5%, it is advisable to hold the ball in your hand and scatter it when it falls to the ground. Then put it into a nutrition bowl of 6 ~ 8 cm, plant the single bud (the seed is disinfected with carbendazim first), sprinkle soil to cover the bud eyes, and then spray it with a sprayer. The temperature should be controlled at about 25℃, the minimum should not be lower than 15%, and the height should not exceed 35℃. Generally, it will germinate and emerge in about 1 days. At ordinary times, observation and management should be strengthened, seedlings should be tempered 1 days before transplanting, and transplanted in the field after frost break, so that plastic film coverage is better. To raise seedlings in hotbeds, first prepare plastic films, bamboo chips, grass mats and other materials, and then dig seedbeds. According to the accounting of planting area, it is generally 15 plants per mu, and the seedbed is 3 square meters. The seedbed is 2 ~ 3 meters wide, and the length depends on the number of seedlings. The hotbed soil is the same as the nutrient soil mentioned above. After planting, tie bamboo slices, cover with plastic film and cover with grass. However, the grass cover should be lifted early and covered late to facilitate light absorption and warming. Seedling germination in hotbed is a few days later, but it is not prosperous in Miao Zhuang. Ten days before transplanting, it is also necessary to exercise seedlings in the open air. When transplanting, use a shovel to block the seedlings, then gently take them and put them down, and transplant them to the field in time, whether it is a greenhouse nutrition bowl for seedling raising. It is still a hotbed to raise seedlings in blocks, and it is best to cover the transplanted fields with plastic film (cover the film first and then plant seedlings). So as to facilitate heat preservation and moisture retention. Water and cover the soil in time after planting seedlings. Transplanting seedlings in early spring should be watered at acupoints or watered with small water, and flooding should be avoided.