A detailed introduction of bananas, apples and strawberries.

Banana belongs to the genus Musa, also refers to its fruit. It is an important food crop, which is widely planted and eaten in tropical areas. Bananas are delicious and nutritious, which can be harvested all year round, and are also highly valued in temperate regions.

Bananas like hot and humid climate and thrive in deep soil, loose soil and well-drained land. Irrigation planting is also successful in semi-arid areas such as southern Jamaica. It can be cultivated by root suction and pseudobulb ramet; The first harvest needs 10? 6? 5 15 months, and then harvest almost continuously.

Banana-layers of flowers, layers of fruits. Frequent pruning is needed to remove too many new plants and prevent plants from crowding.

The main production bases in the world are Costa Rica, Honduras, Guatemala, Mexico, Panama, Dominican Republic, Guadeloupe, Jamaica and Martinique in Central America and the West Indies, Brazil, Colombia and Ecuador in South America, Canary Islands, Ethiopia, Cameroon, Guinea and Nigeria in Africa, and Taiwan Province Province in Asia.

Banana is one of people's favorite fruits. Europeans call it "happy fruit" because it can relieve depression, and bananas are also the favorite fruit for girls to lose weight. Bananas are also called "fruits of wisdom". Legend has it that Buddha Sakyamuni got his wisdom by eating bananas. Bananas are high in nutrition and low in calories. They contain phosphorus called "salt of wisdom", and are rich in protein, sugar, potassium, vitamins A and C, and also rich in dietary fiber, so they are quite good nutritious foods.

Apple is the fruit of Rosaceous, with about 25 species. Apple tree is the most widely cultivated fruit tree. Apple is a kind of pear fruit, which is developed from ovary and tissues around it. Most apple trees are cross-pollinated, with 2? 6? 54% flowers have ideal fruit setting rate. Although the size, shape, color and acidity of mature apples vary greatly due to varieties and environmental conditions, they are generally round with a diameter of 50? 6? 5 100 mm (2? 6? 54 inches), with red or yellow.

There are thousands of varieties of apples, which are divided into three categories: wine varieties, cooking varieties and tail foods. The three varieties are different in color, size, fragrance, smoothness (and possibly crispness and flavor). Many varieties have high sugar content, moderate acidity and low tannin content. Besides raw apples, there are many cooking methods, which are often used as snack fillings. Apple scones may be the earliest sweet-tailed food in America. Fried apples are often eaten with sausages, pork chops and other dishes, especially in Europe.

The genus Malus is native to temperate regions in both hemispheres. The earliest Europeans ate apples and improved their choices. Some varieties were seen more than 2000 years ago. Before colonizing the United States, there were hundreds of known varieties in Europe. Later, with the wave of immigration sweeping across North America, the seedlings of apple varieties also spread everywhere, becoming itinerant messengers of local legends, which played an important role in the spread of apples. The most prominent one was john chapman (nicknamed "〔Johnny Appleseed"), who planted apples widely in Ohio and Indiana. Indians and hunters may also spread apples.

Apple trees need a certain dormancy period, in areas where winter is obvious (generally at 30? 6? 560) is growing well. Further north, due to the cold winter and short growing season, planting is restricted. When planting apples, we should choose soil with good drainage and fertilize when the fertility is insufficient. The top of a rolling hill or hillside is best for growing apples. In this terrain, cold and heavy air will flow down into the valley on a cold spring night, otherwise the apple flowers and fresh fruits will be frozen. Taking the selected variety as scion, the rootstock is usually 1 August, and after grafting, it is1? 6? Transplanted orchard in 52 years. 6? 6? After 58 years, there will be considerable output; Prior to this, the management work was mostly limited to weeding and pest control, and pruning was needed (especially in the first five years) to make the distribution of main branches reasonable and the weaker branches would not break under the weight of fruits. Adult fruit trees should be sprayed with pesticides in strict accordance with regulations to prevent pests, which may also delay their vigorous growth in spring, sparse young fruits and reduce fruit drop in autumn. Varieties that mature in late summer are generally not suitable for storage. Varieties that mature in late autumn can be carefully stored for up to one year. It can be stored for a long time at a temperature slightly higher than the freezing point of apples. Apples can also be stored in inert gas or air with controllable composition. apple

The annual output of apples in the world is about 32 million metric tons. Apples produced in the United States are usually eaten semi-fresh; About 1/5 is used to make vinegar, fruit juice, jelly, apple puree, etc. About 1/6 was made into canned applesauce, which was used as the raw material of pie. In Europe, most apples are used to make cider and brandy. Apples used to brew cider account for 1/4 of the world output. The United States, China, France, Italy and Turkey are the largest producers, while France, Italy, Hungary, Argentina, Chile, South Africa and the United States are the largest exporters. Apple is rich in carbohydrates, vitamins A and C, and contains a lot of fiber, which is also necessary for human body.

Strawberry is the fruit of Rosaceae strawberry. Strawberries are native to South America, Europe and other places, and now they are cultivated all over China, as well as wild ones. From June to July every year, when the fruit is ripe, it is rarely used.

Nutritional analysis

1. Carotene contained in strawberry is an important substance for synthesizing vitamin A, which has the functions of improving eyesight and nourishing liver;

2. Strawberry has a certain nourishing and conditioning effect on gastrointestinal tract and anemia;

3. Strawberry can not only prevent scurvy, but also prevent arteriosclerosis and coronary heart disease.

4. Strawberry is a plant rich in tannic acid, which can absorb and prevent the absorption of carcinogenic chemicals in the body and has the function of preventing cancer;

5. Strawberry contains aspartic acid, which can naturally and peacefully remove heavy metal ions from the body. Strawberry has bright color, soft and juicy fruit, rich fragrance, sweet and sour taste and rich nutrition, which is deeply loved by consumers at home and abroad. It belongs to high-grade fruit.