In the countryside, you can always see many plants, they look more ordinary, but since ancient times have been valued by farmers, those poor people are using it as a life-saving food, after all, in the past, the yield of crops was not too high, it is difficult to meet the daily food demand. And those wild plants, as long as they can be eaten, are dug up and tasted by farmers. However, some plants have toxic components, and people may be life-threatening when they eat them. In order to be able to distinguish whether plants are edible, the ancients always observed the diet of animals, and as long as they could eat, most of them were also edible.
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The plant mentioned today, it is the favorite of squirrels, its name is called oak, that is, the fruit of the oak tree. Oak is a kind of tree, its plant is relatively tall, can grow to 20-30 meters high, is also the world's largest flowering plant, can grow about four hundred years, the life cycle is relatively long, the bark does not look too bright, the branches appear brown, no soft hairs exist.
The leaves of the oak tree are oval in shape, their length is 12-25 cm, the width is 10 cm, the edge of the leaf is jagged, there are certain cracks, the leaf veins are relatively protruding, the leaf surface is dark green, and the reverse side is pale green. Its inflorescence grows with the leaves and is always clustered, usually the female flowers open later, and after the petals wither, they will grow a shell bucket, taking the shape of a cup, and the nuts inside.
The acorn looks oval from the outside, with a height of 2.5 cm and a width of 1.5 cm. Since human slash-and-burn cultivation has been picking oak chestnuts for food, its wood is also the main raw material for early human fire, its calorie is relatively large, so it has always been deeply liked.
Oak trees grow better in those wet and fertile places, are much more resistant to stress, can tolerate dryness, water wetness, can grow in strong winds and low temperatures, and can still thrive even in sticky soils. Of course, oak trees grow very well in sandy soil or well-drained slightly acidic soil, and can also play a role in purification in places with more serious pollution, and its growth rate is relatively fast, and it can grow 60 cm tall a year. In China, Tai'an, Beijing, Liaoning, Hebei, Changyang, Henan and other places can be seen.
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Oak trees are full of treasures, its wood inside the honeycomb, contains a certain amount of air, so the elasticity is better, itself can be very good wear resistance, the engine's cylinder pad is made of oak. It can also be moisture-proof, prevent moths, in those damp and dark environments can still be well preserved, so it is also used in the production of wine corks, and it is a natural plant, green and natural, no harm to the human body. It is also used in buildings, furniture and other materials, insect and moisture-proof effect is good.
The leaves of the oak chestnut can also be used for the use of cage cloth, whether it is steamed steamed buns, buns or dumplings can be replaced, has a natural fragrance, its young leaves can be edible, in ancient times has been a favorite life-saving food. Of course, its leaf animals also like it, and can be used on oak leaves when raising silkworms, its nutritional value is high, the quality of silkworm cocoons is relatively good, and the silkworm pupae raised is also a delicacy.
Oak chestnut starch composition is high, as much as 46%, its oil content is also very rich, high protein composition, so oak chestnut from ancient times is a life-saving food, in the "Saving the Wilderness Materia Medica" also introduced the way to eat, that is, boiled in water 15 times, and then cleaned, steamed can be tasted. It can also be dried, peeled and ground.
Nowadays, the oak chestnut has sold for 18 yuan a catty, but many people have cut it down, and because it takes more than 10 years to grow into wood, the time is too long, so the economic benefits are not high and it is not popular.