[Edit this paragraph] Variety classification
Banana varieties are one of the four categories of bananas, and there are many main varieties of bananas. According to statistics, there are more than 300 banana varieties in the world, 80 in Taiwan Province Province and more than 30 in mainland provinces. Banana cultivation is the most common in China, and there are also small areas of banana, pink banana and longan banana. 1. Banana has a high planting height, which belongs to Gao Qian type fragrant tooth banana, also known as Qinggaoba and Gaoba fragrant tooth banana, and Fujian is called Gaotianbao banana, which is an excellent variety in Dongguan, Guangdong. The plant is tall and strong, with a false stem height of 260 ~ 360 cm and a stem circumference of 85 ~ 95 cm. The leaves are long, the sheath distance is sparse, and the main veins on the back of the leaves are covered with white powder; The ear length is 75 ~ 85cm, the number of fruit combs is 9 ~ 1 1, and the finger length is19.5 ~ 20 cm. The pulp is smooth and sweet, with 20% ~ 30% soluble solids; Generally, the yield per plant is 20 ~ 25 kg, and the highest yield can reach 60 kg. This variety has high yield, good quality, strong drought and cold tolerance, and quick recovery after cold injury, but it is vulnerable to wind injury. 2. Gaojiaodun Landmine Gaojiaodun Landmine belongs to Gao Qian banana, which is one of the excellent varieties in Gaozhou City, Guangdong Province. The plant is the highest, the height of the pseudostem is 300 ~ 400 cm, the circumference is 70 ~ 80 cm, and the thickness under the pseudostem is obvious. Leaves are long and narrow, petioles are slender, leaves are yellow-green, and sheath distance is sparse; The ear is medium-long, the number of combed fruits and fruit index are less, but the single fruit is long and heavy. The length of fruit finger is 20 ~ 24 cm, the weight of single fruit is above 150 g, the content of soluble solids is 20% ~ 22%, and the quality is medium. Under general cultivation conditions, the yield per plant can reach 25 ~ 30 kg, and the high yield can reach 70 kg. This variety has long fruit shape, high yield and good quality, but it requires high fertilizer, water and temperature. Its economic performance in the Pearl River Delta is not ideal, its wind resistance is extremely poor, its recovery ability after frost is low, and banana bunchy top disease is prone to occur. 3. Seven flavors and seven flavors belong to Gao Qian banana, which is mainly distributed in Gaozhou City, Guangdong Province, and is an excellent variety in Gaozhou City. The height of the pseudostem is 300 ~ 360 cm, the stem circumference is 65 ~ 80 cm, the stem is even up and down, and the skin color is light green; Leaves are vertically elongated upward, long and narrow, petiole is slender, sheath distance is sparse, and leaves are dense, especially before and after budding, hence the name; Under normal circumstances, the number of combs and fruits per ear is similar to that of Gaojiaodun Mine. The average number of ear combs is 8 ~ 10 comb, the fruit index length is 18 ~ 22 cm, the single fruit weight is 130 ~ 140 g, and the soluble solids are 19% ~ 20%, with medium quality. Under normal circumstances, the yield per plant can reach 25 ~ 30 kg, and the highest can reach 50 kg. This variety has high yield and long fruit index, which is one of the varieties suitable for export and northward transportation, but it has poor wind resistance, weak cold resistance and disease resistance, and requires high water and fertilizer conditions. There are two strains of this variety: tall foot and short foot. 4. Hekou Gaoba Banana Hekou Gaoba Banana belongs to Gao Qian type sweet tooth banana, which is the main cultivated variety in Hekou County. The plant is tall, the pseudostem is 260 ~ 300 cm high, the comb shape is neat, and the fruit index is many. Usually, each ear has 10 comb teeth, more than 200 fruit fingers, and the length of fruit fingers is 15 ~ 2 1 cm. The fruit quality is soft and sweet. Good quality; Under general cultivation conditions, the yield per plant is 20 ~ 40 kg, and individual high-yield plants reach 50 kg. This variety has high yield and good quality, and is very suitable for planting in areas with high temperature and high humidity and sufficient fertilizer and water. 5. Fairy banana is a Gao Qian-type fragrant tooth banana, which is mutated from Beijiao in Taiwan Province Province. Its comprehensive characters are very similar to those of Beijiao, and it is the main cultivated variety in Taiwan Province Province. The plant is tall and thin, with a pseudostem height of 270 ~ 320 cm. The leaves are slightly longer and wider than bananas, and the color is lighter. The fruit has high sugar content, but the quality is slightly worse than that of Beijiao, and the causal skin is thicker. Fruits are more resistant to storage and transportation; The yield per plant is better than that of Beijiao. Strong resistance to bunchy top disease, suitable for large-scale planting in barren mountainous areas, but the growth period is longer than that of Beijiao 15 ~ 30 days, and the wind resistance is also poor. In addition, oil banana, Yunnan tall banana, Guangxi tall banana, Bo Yue (also known as Taiwan Province green skin) and Brazil banana are all Gao Qian-type fragrant-tooth bananas. 6. Short-legged mine Short-legged mine belongs to medium-dry banana and is one of the main varieties planted in Gaozhou City, Guangdong Province. Plant pseudostems are 250 ~ 280 cm high, grow healthily, have long leaves and short petioles; The ears are longer and the comb spacing is denser. There are many small fruits, the fruit index is long 18 ~ 22 cm, and the soluble solid content is 20% ~ 22%. The quality and flavor are better than those of Gaojiaokuang and Qiwei, and the quality is above average. Generally, the yield per plant is 20 ~ 28 kg, and the yield per plant can reach 50 kg. This variety has stable yield, strong adaptability, moderate wind resistance, strong cold resistance and quick recovery after frost. 7. Williams Williams is a medium dry banana, which was introduced from Australia. The height of the plant is 250 ~ 280 cm, and the circumference is 47 ~ 58 cm. The leaf length is 175 ~ 193 cm, and the leaves grow slightly upright. The ear length is 65 ~ 80 cm, the comb shape is good, the fruit fingers are arranged tightly and straight, and the number of combs is also 8 ~ 10. The number of fruits is slightly less; Fruit fingers are longer. Fruit index 19 ~ 23 cm, medium quality. This variety has good fruit shape, but poor wind resistance and is prone to leaf spot disease. In China, people from different places have different personalities and reflect differently. 8. Yuejiao No.2 (formerly known as 63- 1), formerly known as 63- 1, is a medium-dry fragrant-toothed banana selected from imported Vietnamese bananas by the Fruit Research Institute of Guangdong Academy of Agricultural Sciences. The pseudostem is 200 ~ 265cm high, the leaf length is 203 ~ 2 13cm, the petiole is 38cm long, and the leaf is slightly shorter and wider. The ear length is 70 ~ 85 cm, and the number of ear combs and fruit fingers are more, which are 10 ~ 1 1 comb respectively. 165 ~ 2 10, slightly slender fruit index 18 ~ 23 cm, single fruit weight 125 ~ 145 g, total sugar content 19.8%, and medium quality; Generally, the yield per plant is 22-32kg, which has strong wind resistance similar to that of dwarf bananas, moderate cold and disease resistance, moderate storage resistance and quick recovery after freezing. This variety has high yield, good fruit shape, good quality and strong adaptability, and is suitable for planting everywhere, but it requires high water and soil. 9. Guangdong Banana 1, formerly known as 74- 1, is a short to medium dry fragrant-toothed banana selected from Gaozhou dwarf bananas in 1974. Plant pseudostems are 200 ~ 240 cm high and stout. Even up and down; Leaves 200 cm long, petiole 36 cm long, leaves short and wide; The ear is of medium size, the ear length is 68 ~ 76.3 cm, the number of fruit combs10 ~1,the number of fruits 190 ~ 208, the finger length 17 ~ 22 cm, and the single fruit weight/kloc-0. General yield per plant 18 ~ 27 kg, wind resistance, cold resistance, leaf spot resistance, medium storage resistance. This variety has high yield, stable yield, strong stress resistance and quick recovery after cold. It is a new variety suitable for cultivation in southern China, especially in coastal areas with frequent typhoons. However, there are high requirements for soil, fertilizer and water conditions in cultivation, so attention should be paid to loosening soil and proper irrigation and drainage. In addition, Guangdong Alba, Dongguan CMB, Zhongshan Yajiao, Taiwan Province Beijiao, Yunnan Hekou CMB, Guangxi Longzhou CMB and other varieties are all medium-dry fragrant Yajiao. 10. Gaozhou Dwarf Banana Gaozhou Dwarf Banana belongs to the short dry banana with fragrant teeth and is one of the local varieties in Gaozhou City. The pseudostem of the plant is short and stout, and its height is 150 ~ 170 cm. Wide leaves, short petioles and dense leaf sheaths; The fruit ditch is short, the comb spacing is dense, the fruit index is more, the fruit shape is slightly smaller, the fruit finger length is 16 ~ 20 cm, and the fruit quality is better. Under general cultivation conditions, the yield per plant is 13 ~ 18 kg. Up to 28 kg; Strong wind resistance, strong cold resistance, quick recovery after frostbite, and better tolerance to thin and barren soil. It is suitable for dwarf and close planting, but it has low yield, small fruit shape and weak resistance to bunchy top disease. 165438+ false stem height 160 ~ 180 cm, oblong leaves, oval leaf base, flat apex and short and thick petiole. The flesh is pale yellow and white. The meat is tender, sweet and fragrant, with good quality; The yield per plant is generally 10 ~ 15 kg, which has strong wind resistance. This variety has excellent quality and is suitable for close planting and planting in coastal areas. It is one of the best varieties transported to the north and exported, but it has poor cold resistance, weak disease resistance and easy degradation, so attention should be paid to it when cultivating. 12. Guangxi dwarf banana Guangxi dwarf banana is a kind of short, dry and fragrant banana, also known as Pubei dwarf banana, Baishishui banana and Gu Ping banana. , is the main banana variety in Guangxi. According to Liu Rongguang, the plant height 150 ~ 175cm, perimeter 46 ~ 55cm, leaf length 140 ~ 16 1cm, leaf width 65 ~ 78cm and leaf width 275 ~. The ear length is 50 ~ 56 cm, the comb length is 9 ~ 12, the fruit index is 135 ~ 183, the fruit index is 16.2 ~ 19.2 cm, and the quality is good. The yield per plant is generally 1 1 ~ 20kg, with strong wind and disease resistance but small fruit index. In addition, Nalong banana in Guangxi, Honghe dwarf banana in Yunnan and Mexican banana imported from Mexico are all shorter than banana. 13. Plantago Plantago is a type of plantain, which is one of the local varieties in Xinhui, Guangdong. According to many reports, the false stem of plantain is 350 ~ 400 cm high and the stem circumference is 85 ~ 99 cm. The size is consistent from top to bottom, with more fruit combs and more fruit fingers, and the fruit fingers are11~13.5 cm; Soluble solids 24% ~ 25%, the quality is the same as other plantains; The yield per plant is generally 15 ~ 27 kg, which has good wind resistance but long growth period. In addition, the banana of Shunde Zhongba in Shunde, Guangdong, the banana of Jiao Jiao in Guangxi, the banana of Chai in Fujian, Banjiao in Sichuan and the pepper in Yunnan all belong to the post-banana type. 14. Saigon bananas belong to the type of powder bananas, also known as powder bananas, rice bananas, glutinous rice bananas and egg bananas. About 1932 was introduced from Vietnam, which is the main variety in Nanning and Longzhou, Guangxi, and has been introduced in all producing areas. The pseudostem of the plant is 400 ~ 500 cm high, the petiole is 70 cm long, and the leaves are light-colored with red stripes. The back of leaves is densely covered with wax powder; The number of spent grains is as high as 14 ~ 18, and the fruit index is high. The fruit is shaped like a banana, with a big head, full tips at both ends, finger length of11~13.5cm, thin skin, grayish green, light yellow when ripe and easy to turn black. The pulp is milky white, tender and smooth, with a sweet taste, and the soluble solid content is 24%, the highest is 28%, and the aroma is slightly light; Under normal conditions, the yield per plant is 15 ~ 20kg, and it has strong adaptability to wind, cold and drought. This variety has medium yield, excellent quality and strong stress resistance, but its skin is thin and easy to crack, it is not resistant to storage and transportation, and it is easy to be infected with Panama wilt. In addition, Guangdong Academy of Agricultural Sciences introduced banana varieties from Bangladesh in 1982. 15. Musa Musa belongs to the type of longan, also known as longan or banana, and is the main cultivated variety in Fujian Province. Plant pseudostems are 340 ~ 400 cm high, yellow-green, with a few brown spots; The leaves are long and narrow, and the petiole groove is deep; The fruit shape is short and slightly curved. The finger is 13.0 ~ 16.5 cm long, full, with sharp ends and thin skin. After maturity, the skin is bright yellow and beautiful without spots. The pulp is milky white, the pulp tissue is solid, the meat is smooth and sweet, and the soluble solid content is 23% ~ 26%. The yield per plant is generally 15 ~ 20kg, with cold tolerance. The yield of this variety is average, but the quality is good, the adaptability is strong, the wind resistance is weak, and it is susceptible to Panama wilt. In addition, 1984 was introduced from Jinghong, Yunnan, to Bangladesh, Yunnan, the fruit research institute of Guangdong Academy of Agricultural Sciences, which also belongs to the type of longan and banana. Classification of bananas Botanically, bananas belong to monocotyledonous class, Musa order, Musaceae and Musa genus. Bananas have two ancestors, the pointed leaf banana and the long-stemmed banana. Banana cultivars evolved from interspecific or interspecific hybrid offspring of these two primitive wild bananas. Banana is a general name, alias bear horn (named after the slight bending of causality), sweet horn (called it in ancient times), banana and agricultural banana. According to the shapes of the stems, leaves, flowers and fruits of bananas, China is customarily divided into bananas, plantains, longan and banana powder. Simon put forward banana classification in 1955. In 1980s, Guangdong Fruit Research Institute classified the fruit germplasm of 100 countries preserved in Guangzhou Banana Garden by using isozyme, chromosome, fruit characters and plant morphology, and found some rules. Simon's classification. Simon's classification method is based on the character 15 of banana, and then compares it with pointed banana and long-stemmed banana item by item, and marks it according to similarities and differences. Those bananas with the same characteristics as pointed bananas are given 1 point, long-stemmed bananas are given 5 points, and those with characteristics between pointed bananas and long-stemmed bananas are given 2 to 2 points according to the same degree. Table 5 Morphological representations of banana classification marks: pointed leaf banana (M.A.) and long-handled banana (M.B.)
1. Pseudostems are dark or light in color, with brown spots or black spots, and the edges are not obvious or absent.
2. The edge of the petiole groove is upright or outward, and there are membrane wings under it. The edge of the pseudostem is not tightly wrapped downwards, and there are no leaf wings under it, which tightly wrap the pseudostem.
3. Fruit axis is generally fluffy or smooth and hairless.
4. The fruit stalks are short and long.
5. Ovules have two rows of regular ovules in each chamber and four rows of irregular ovules in each chamber.
6. Bract shoulders are generally higher (the ratio of the height from the stem to the widest part of the bract to the height of the bract; 0.30)
7. The degree of bract curl. Bracts spread out, bend outward and roll up. Bracts only lift up, but do not roll back.
8. Bracts form a long oval and a wide oval with needles.
9. The tip of the bract is sharp and blunt.
10. Bracts are red, dark purple or yellow outside, pink, dark purple or brown inside, with obvious brownish purple outside and bright red inside.
1 1. The faded inner part of the bract gradually faded from top to bottom, and the inner part faded evenly.
12. Bract scar protuberance microprotrusion
13. The shape of the free petal of the male flower has more or less folds under the apex, and there are few folds.
14. The petals of male perianth are milky white and more or less pink.
15. The stigma is orange, light yellow, light yellow or pink.
Note: According to Symonds and Shepard, 1955. According to the listed characters, the Zhong Zhongbiao score of banana cultivation is 15 ~ 23, and the hybrid of banana with pointed leaves and banana with long handle with a score above 26.
[Edit this paragraph] Distribution area
Originated in tropical and subtropical areas of Southeast Asia. China is one of the ancient countries that grow bananas in the world. At present, most of the main banana varieties planted abroad are imported from China. Bananas are distributed in tropical and subtropical areas within the latitude of 30 degrees in the east, west and southern hemisphere. Bananas are grown in 130 countries in the world, among which Central America has the highest yield, followed by Asia. Bananas in China are mainly distributed in Guangdong, Guangxi, Fujian, Taiwan Province, Yunnan and Hainan, with a small amount planted in Guizhou, Sichuan and Chongqing. Guangdong mainly produces Zhanjiang, Maoming, Zhongshan, Dongguan, Guangzhou and Chaozhou. Guangxi mainly produces Lingshan, Pubei, Yulin, Nanning and Qinzhou, while Fujian is mainly concentrated in Zhangpu, Pinghe, Nanjing, Changtai, Zhaoan, Hua 'an, Xiao Yun, Longhai, Xiamen, Nan 'an, Putian and Xianyou. Taiwan Province Province mainly produces bananas in Kaohsiung and Pingtung, followed by Taichung and Taitung.
[Edit this paragraph] Growth environment
1. The annual average temperature distribution area is above 265438 0℃, and a few are around 20℃. Banana requires high temperature and high humidity, and the growth temperature is 20-35℃, the most suitable is 24-32℃, and the lowest is not lower than l5. 5℃. Bananas are afraid of low temperature, frost and snow, and their cold tolerance is weaker than that of banana and powder banana. The critical temperature of growth inhibition is 65438 00℃. When the temperature dropped to 5℃, the leaves turned yellow due to cold damage, and the leaves at 1-2℃ died. Fruit 12℃ chilling injury, the skin color is grayish yellow after ripening, which affects the commodity value. 2. Soil and moisture Banana roots are delicate, which requires strict selection of soil. Cohesive soil with poor ventilation structure or poor drainage is extremely unfavorable to the development of roots. Sandy loam with viscosity content less than 40% below groundwater level 1m, especially alluvial loam or humus loam. Practice has proved that if the physical properties of the soil are not good, it is difficult to promote the normal growth of bananas even if there is sufficient supply of fertilizer and water. The pH value of soil is 4. 5 ~ 7.5, preferably 6. 0. Fusarium is easy to be invaded because of its rapid propagation in soil below 5.5. Bananas in saline environment are not very sensitive, but the exchangeable sodium ion in soil is not suitable when it exceeds 300 mg/L, and the average monthly rainfall 100mm is the most suitable, and the rainfall below 50mm is the dry season. Due to lack of water, the germination period of banana is prolonged, the fruit index is short and the yield per unit area is low. For example, when the banana orchard is flooded or flooded, the leaves will turn yellow, which is easy to induce leaf spot epilepsy and the yield will drop greatly. In severe cases, the roots will suffocate and rot, leading to plant death. 3. The banana leaves are big, the pseudostems are brittle, and the roots are shallow, so it is vulnerable to wind damage. When the wind speed is 25-30km/h, the leaves tear, the petiole blows off, the 65 km/h false stem breaks or the whole plant blows down; 100km/h can destroy the whole banana garden.
[Edit this paragraph] Value significance
Banana fruit is sweet, rich in carbohydrates and rich in nutrition. According to the analysis, each 100g pulp contains 20g of carbohydrate, 0.23g of protein/kloc-0, 0.66g of fat, 0.9g of crude fiber, 0.7g of inorganic salt, 70% of water, and also contains provitamin A (carotene) and vitamin B 1. Bananas contain a lot of potassium (a medium-sized banana contains 45 1mg of potassium) and magnesium. Potassium can prevent blood pressure from rising and muscle spasm; Magnesium can relieve fatigue. Banana is also a natural acid-making agent. Because bananas are very easy to digest and absorb, children and the elderly can eat with peace of mind and supplement balanced nutrition. Banana fruit is not only used as fruit, but also used as food in tropical areas of Africa, Asia and America. Banana fruit can be made into various processed products and extracted essential raw materials besides fresh food; Banana plants have high medicinal value: the fruit is cold, which can slide the large intestine, relieve constipation and moisten the lungs; Stem and leaf can induce diuresis and treat edema and beriberi; Mashed roots can cure sores, fever and dysentery; Flower bud can cure hematemesis and hematochezia. Fresh stems, sucking buds and male buds are also rich in nutrients and can be used as pig feed after crushing. Fibers from pseudostems can be used to make ropes, bags and paper. In short, bananas, as fruits and grains, can meet the needs of consumers and play a role in getting rid of poverty and becoming rich in rural areas in the south. 1. The nutritional value of banana is a high-calorie fruit. According to analysis, the calorific value of pulp per100g reaches 378 joules. Bananas are also the main food in some tropical areas. The nutritional value of banana pulp is quite high. Every 100g pulp contains 20g of carbohydrate, 0.2g of protein/kloc-0 and 0.6g of fat. In addition, it also contains a variety of trace elements and vitamins. Among them, vitamin A can promote growth and enhance resistance to diseases, which is necessary to maintain normal fertility and vision. Thiamine can resist beriberi, stimulate appetite, help digestion and protect nervous system; Riboflavin can promote the normal growth and development of human body. 2. The use of bananas Besides fresh fruits, banana fruits can also be used for processing. For example, cooked bananas can be made into banana powder for making cakes and bread; The fruit can be fermented to brew banana wine or extract alcohol; Mature fruit can be processed into canned food, preserved fruit, dried banana, fruit juice, essence and so on. Banana pseudostems, sucking buds and flower buds all contain a lot of nutrients, which are good green feed and can be used to feed pigs. Pseudostems and leaves are rich in cellulose and can be used to make ropes, braids and paper. The juice of pseudostem can be used to extract a food preservative and dye fixative. Pseudostems have high ash content and can be used to make alkaline water. Pseudostems and leaves have high potassium content, and returning to the field after chopping can increase soil organic matter and loose soil, and also increase soil potassium. 3. Economic Significance Banana is an important tropical fruit in Guangxi and plays an important role in fruit production in Guangxi. The planting area is 1.990, exceeding 1.000 hectares, accounting for 3.29% of the total fruit planting area in the whole autonomous region. 199 1 year reached 15333 hectares, accounting for 4.45%; 1992 reached 23,406 hectares, accounting for 5.96%. The output of 1990 ~ 1992 reached 179600 tons, 327000 tons and 494800 tons respectively, accounting for 17.02%, 26.78% and 33.21of the total fruit output in the whole autonomous region. The total output value of bananas (calculated at the market purchase price) was 0,990143.68 million yuan, 65,438,26199110,000 yuan, and1992,395.84 million yuan. Social benefits brought by banana production (such as post-harvest treatment, packaging, loading and unloading, freight in circulation, various taxes, etc.). ) are calculated according to the output value, reaching 65.438+0.4 billion yuan, 260 million yuan and 390 million yuan respectively; The total economic benefits of banana production in Guangxi are 287 million yuan, 523 million yuan and 796.5438 billion yuan respectively. The annual trade volume of bananas in the world is about 6.5438+million tons, and the delivery price of bananas in the world in 654.38+0.990 is $750/ton in Hamburg, Germany (supplied by Central American countries), $566/ton in new york (supplied by Central American and South American countries), $537/ton in Japan (supplied by the Philippines) and $537/ton in France (supplied by Martinique). At 199 1, the above-mentioned port delivery prices are USD 665/ton, USD 572/ton, USD 567/ton and USD 65,438+USD 0064/ton respectively. China's banana exports mainly come from Taiwan Province Province, and most of them are sold to Japanese. Due to the backward and irregular planting technology in inland provinces, post-harvest treatment, packaging, storage and transportation and sales are also very backward, and they have rarely been exported for twenty or thirty years. In the future, if we can plant by stages, break buds early, bag early, pay attention to fertilizer and water management and pest control, pay attention to light harvesting, carding in the field, antiseptic treatment, cutting and carding, carton packaging, and storage and transportation at low temperature (15℃). Edible value From the nutritional point of view, banana is a kind of beneficial fruit rich in starch, which is not suitable for eating more and is easy to get fat. However, from the perspective of Chinese medicine, bananas are sweet and cold, which can clear away heat and moisten intestines and promote gastrointestinal peristalsis, but they are not suitable for people with spleen deficiency and diarrhea. There is always a reasonable explanation for everything. Bananas are cold, and according to the principle of "those who are hot are cold", they are most suitable for people who are hot and dry. People with hemorrhoid bleeding and people with hot and restless fetus can eat raw banana meat. But it is precisely because bananas are cold that people who are prone to deficiency and cold had better avoid them. For example, people with stomach cold (light mouth and bloating), deficiency cold (diarrhea and dizziness), nephritis (also deficiency cold) and swollen feet during pregnancy, it is best not to eat bananas raw. Banana meat can't be eaten unless it is cooked, and its coolness is reduced. As for colds and coughs, bananas are not edible, but it is acceptable to steam bananas before eating. The folk prescription is more effective to treat chronic cough with banana stewed rock sugar; Cook wine with bananas as a diet. Modern medicine believes that banana can cure hypertension, because it is rich in potassium, which can balance the adverse effects of sodium and promote the growth of cells and tissues. Banana can be used to treat constipation because it can promote gastrointestinal peristalsis. Most interestingly, German researchers said that bananas can cure depression and emotional anxiety because they can promote the secretion of endorphins in the brain. In short, people who are hot and dry can eat a banana a day, but if they are afraid of bananas catching cold, they can choose to eat banana (which has stronger laxative power) and imperial bananas. From the perspective of Chinese medicine, Chinese medicine says that bananas are cold and sweet, and their nutritional value has long been recorded in ancient books. Their effects include clearing away heat and toxic materials, relaxing bowels, moistening lungs and relieving cough, lowering blood pressure and nourishing. They are all high-quality fruits, which are really cheap and good. However, people with cold bananas, stomachache and spleen and stomach deficiency should eat less. Several wonders of bananas on the body Bananas are "civilians" in tropical fruits. They are cheap, sweet and delicious, and they are "regular customers" in people's fruit bowls. Do you know what other functions bananas have? Today, let's listen to a nutritionist. On the playground, especially in some "time-consuming" sports competitions, such as tennis competitions, players are sometimes seen peeling bananas to eat during breaks. Is it to fill the stomach or to replenish energy? When exercising, you should not eat too much. The main purpose of eating bananas halfway is to make up for the rapid loss of energy in the body. Nutritionists say that football and tennis players like to eat bananas before the game, which helps them improvise. From the point of view of nutrition, banana sugar can be quickly converted into glucose, which is immediately absorbed by the human body and is a rapid energy source. Bananas are high-potassium foods, and potassium ions can enhance muscle strength and endurance, so they are especially loved by athletes. Bananas help lower blood pressure. Nutritionists say that potassium has an inhibitory effect on sodium in human body. Eating more bananas can lower blood pressure and prevent hypertension and cardiovascular diseases. Studies have shown that eating two bananas a day can effectively reduce blood pressure 10%. Many mothers like to give their children bananas when they are constipated, which is absolutely correct. Nutritionists say that bananas are rich in soluble fiber, namely pectin, which can help digestion and regulate gastrointestinal function.