bananas are high-calorie fruits, and the calorific value per 1 grams of pulp is analyzed to be 378 joules. Bananas are also the main food in some tropical areas. Banana pulp has a high nutritional value, with 2 grams of carbohydrate, 1.2 grams of protein and .6 grams of fat per 1 grams of pulp. 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, promote appetite, help digestion and protect nervous system; Riboflavin can promote normal growth and development of human body.
2. Use of bananas
Banana fruit can be used for processing besides fresh fruit. 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 fruits can be processed into cans, preserved fruits, dried bananas, fruit juices, flavors and so on. Banana pseudostems, sucking buds and flower buds all contain a lot of nutrients, which is a good green feed and can be used to feed pigs. Pseudostems and leaves are rich in cellulose, which can be used to make ropes, braids and paper. The juice of pseudostem can be used to extract a kind of food preservative and dye fixative. The ash content of pseudostem is high and it can be used to make alkaline water. The potassium content of pseudostems and leaves is high, and returning to the field after chopping can increase soil organic matter and loosen soil, and also increase soil potassium.
3. Economic significance
Banana is an important tropical fruit in Guangxi, which plays an important role in fruit production in Guangxi. The cultivated area was more than 1, hectares in 199, accounting for 3.29% of the total fruit cultivation area in the whole autonomous region. In 1991, it reached 15,333 hectares, accounting for 4.45%; In 1992, it reached 23,46 hectares, accounting for 5.96%. From 199 to 1992, the output reached 179,6 tons, 327, tons and 494,8 tons respectively, accounting for 17.2%, 26.78% and 33.21% of the total fruit output in the whole autonomous region. The total output value of bananas (calculated at the market purchase price) was 143.68 million yuan in 199, 261.6 million yuan in 1991 and 395.84 million yuan in 1992. The social benefits brought by banana production (such as post-harvest treatment, packaging, loading and unloading, freight in circulation, various taxes, etc.) reached 14 million yuan, 26 million yuan and 39 million yuan respectively according to the output value; The total economic benefits of banana production in Guangxi are 287 million yuan, 523 million yuan and 791 million yuan respectively. The annual trade volume of bananas in the world is about 1 million tons. In 199, the world banana port delivery price was $75/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 $944/ton in France (supplied by Martinique). In 1991, the above-mentioned port delivery prices were $665/ton, $572/ton, $567/ton and $1,64/ton respectively. China's banana exports are mainly from Taiwan Province Province, and most of them are sold to Japan. Because the cultivation techniques in mainland provinces are backward and irregular, and the post-harvest treatment, packaging, storage, transportation and sales are also very backward, there are few exports in the past 2 or 3 years. In the future, if we can plant in stages, break buds early and bag, pay attention to fertilizer and water management and pest control, we should pay attention to light harvesting and bedding, carding in the field, anti-corrosion treatment, cutting and packaging in cartons, and carry out storage and transportation at low temperature (15℃). [Edit this paragraph] Nutritional analysis Bananas contain almost all vitamins and minerals. The calorie of a banana with a net weight of about 1 grams is only about 87 kilocalories, which is about half or less than that of a white meal (15 grams -22 kilocalories).
bananas contain a lot of potassium (a medium-sized banana contains 451mg of potassium) and magnesium. Potassium can prevent blood pressure from rising and muscle spasm, while magnesium has the effect of eliminating fatigue. Banana is also a natural acid-making agent. Because bananas are very good for digestion and absorption, children and the elderly can eat them with peace of mind and supply balanced nutrition. [edit this paragraph] nutrient elements of bananas List of nutrient elements of bananas (banana)
(contained in every 1g)
Component name content component name content
Edible part 59 Moisture (g) 75.8 Energy (kcal) 91
Energy (kilojoule) 381 protein (g) 1.4 Fat (g). 22 dietary fiber (g) 1.2 cholesterol (mg)
ash (g) .6 vitamin a (mg) 1 carotene (mg) 6
retinol (mg) thiamine (mg) .2 riboflavin (mg) .4
nicotinic acid (mg) . .24
a-E .24 (β-γ)-E δ-E
Ca (mg) 7 P (mg) 28 K (mg) 256
Na (mg) .8 Mg (mg) 43 Fe (mg) .4
Zn. 2.5 ,
component name content (mg) component name content (mg) component name content (mg)
isoleucine 42 leucine 86 lysine 6
sulfur-containing amino acid (T) 37 methionine 37 cystine
aromatic amino acid (t) 72 phenylalanine 46 tyrosine 26
threonine 49 tryptophan 6 valine 72
arginine 6 histidine 89 alanine 44
aspartic acid 157 glutamic acid 172 glycine 43
proline 49 serine 51
Who discovered bananas?
Bananas were discovered when Alexander the Great occupied India in 327 BC.
Bananas originated in southeast Asia. Wild bananas are found in Yunnan, Guangdong, Hainan, Fujian and southeastern Tibet in China. Banana is one of the oldest cultivated plants in the world, which was discovered more than 3 ~ 4 years ago and recorded in Greece more than 4 years ago. At present, bananas have developed rapidly all over the world, mainly distributed in the tropical and subtropical areas of 3 north and south latitude in the eastern and western hemispheres, and a few are distributed outside 3 north latitude. There are 12 countries and regions that cultivate bananas all over the world, among which the main producing areas are Central and South America and Asia. [Edit this paragraph] The edible value of bananas From the nutritional point of view, bananas are beneficial fruits rich in starch, while from the perspective of traditional Chinese medicine, bananas are sweet and cold, which can clear away heat and moisten intestines and promote gastrointestinal peristalsis, but it is 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 who suffer from hemorrhoid bleeding, and those who have restless fetal movement due to dryness and heat can eat banana meat raw.
However, it is precisely because bananas are cold, and those with weak constitution are better off avoiding 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. You can't eat banana meat unless it is cooked and its coldness decreases. As for cold cough, bananas should not be eaten, but it is acceptable to steam bananas before eating.
folk prescription is more useful to stew rock sugar with banana to cure chronic cough; Boil wine with bananas as a diet. Modern medicine suggests 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. The most interesting thing is that German researchers say that bananas can cure depression and emotional anxiety because they can promote the secretion of endorphins in the brain.
In a word, people who are hot and dry can eat a banana a day, but if they are afraid of banana cold, they can choose to eat plantain (which has stronger laxative effect), imperial banana and other varieties.