Canada is called "the country of maple trees". In the center of the national flag, a huge red maple leaf is painted. Maple leaf patterns can be seen everywhere in daily life. People are proud of the red, warm and sincere maple leaf, also known as sugar maple, which is a tall deciduous tree. It is 40 meters high, 40- 100cm in diameter and 500 years old. The trunk contains the most starch and turns into sucrose in winter. In warm weather, sucrose will turn into sweet juice. If you drill a hole in the tree, the sap will flow out. Sugar boiled with tree juice is called maple syrup or maple syrup "drilling sugar": on the trunk of a tall tree, people drilled several holes and put pipes in the holes. Soon, a lot of liquid flowed out from the outer end of the pipes. People pour the collected liquid into the pot and cook it on the fire. I saw that the water in the liquid was evaporated bit by bit, and finally, there was only a sticky, golden yellow and sticky liquid left in the pot. Have a taste, ah! That's so sweet. It turns out that the remaining liquid is sweet syrup. Smell it, it has a faint fragrance. It turns out that this is not ordinary sugar, but a maple sugar, which is produced on a maple tree in Canada. Sugar maple is a kind of maple, which is a deciduous tree up to 40 meters high. Sugar maple is a "longevity" tree, which can live for four or five hundred years. Autumn has come, and the maple leaves on the maple trees are all red, which looks really beautiful from a distance. This sugar maple tree in Canada has brought a lot of fun to the Canadian people. Every March, Canada holds the Maple Sugar Festival. Many people take this opportunity to try their hand in Fenglin. Often, the whole family goes to the sugar maple forest, drills holes in the trees, and uses pipes to let the sap flow into the barrels. The next day, amid people's cheers, the big barrel of sap was poured into the cauldron set up in the open space, and the fire was lit below, and the syrup began to boil. Burn to burn, finally boil out the golden syrup. People eat hot syrup mixed with cold snow, which really has a different flavor. Sugar maple is also a beautiful and strong wood, and it is really a very strange and good tree species. Sugar maple-sugar maple The sugar, brown sugar and rock sugar we usually eat are mainly boiled with sugar cane and sugar beet. Cooking sugar with sap secreted by trees is a new thing in China. In the forests of temperate regions of North America, there is a kind of sugar maple, commonly known as maple, which is the most famous in Canada. Every year after the autumn, the layers of forests are dyed, and the mountains are everywhere, and it is beautiful to climb and look far away. Young people especially like to collect maple leaves of various shapes and make them into bookmarks and souvenirs for friends. Maple leaf patterns can be seen everywhere in Canada. They are used in books, electrical appliances and commodities. Even the huge red leaves in the center of the Canadian flag are the leaves of sugar maple. Every April, the day of harvesting maple sap, is designated as Maple Festival. In the area where maple trees are lush, villagers sing and dance to celebrate the harvest festival. In the bustling market, all kinds of foods processed with maple sugar are dazzling, sweet and delicious. The output of maple sugar is the largest in Canada. According to relevant data, there are still 3 million gallons every year, which are exported in addition to domestic sales. The cutting and processing of maple sugar has a long history in North America. Local indigenous Indians have long mastered the techniques of planting maple trees, cutting and processing maple sugar. Maple sugar plays an important role in sugar raw materials. According to historical records, 9 million gallons of maple sugar were sold in 1869. Later, due to the rapid development of sucrose production and the low price of sucrose, maple sugar fell from the position of main sugar, and the output was not as good as before. Only in Canada, the output of maple sugar has been in the leading position in the world, accounting for 70% of the world's total output. There are several varieties of sugar maple, such as sugar maple, silver maple and red maple. The first two kinds are famous for producing sugar. The juice secreted by sugar maple contains 3-5% sugar, and the high content can reach 10%. Sugar maple trees that are generally 15-20 years old can start drilling and cutting sugar liquid. The hole is small, with a depth of about 4-6 cm. According to the thickness of the trunk, the distance between the hole and the ground can be 45-200 cm. Drill 1-4 holes around each trunk, each hole can flow out about 20 gallons a year, and the continuous collection time can reach more than 50 years. As long as it is trimmed properly, it will not affect the growth of trees. After the sap is cut, the trunk can still be used as high-quality wood. Acer, Aceraceae, Aceraceae. In China, there are more than 100 species of Acer, but there is no report about sugar in tree juice, and the reasons need further study. A large number of sugar maple trees can be planted widely, which can not only make sugar, but also use wood, and also green the environment, with many benefits. Sugar maple introduced by Hubei Institute of Botany has begun to harvest sugar liquid. Preliminary trial planting shows that Acer ginnala grows normally in the middle and lower reaches of the Yangtze River, and it is more suitable in mountainous areas with an altitude of 800 meters-1000 meters. In the near future, a new variety can be added to our sweet additive.