Truffle (scientific name: truffle) is a fungus, often an annual fungus, which grows under pine trees, oak trees and oak trees. Truffle is a kind of mushroom with about 10 different varieties. Truffle has a special edible smell, which is rich in nutrients such as protein and amino acids, so it can't be cultivated artificially and its yield is scarce. Therefore, Europeans rank truffles with caviar and foie gras as "the three most precious dishes in the world".

Truffles can grow in the north, because truffles have low requirements for temperature and high requirements for soil. Truffles like alkaline soil, and high-quality truffles are mainly produced in calcareous terrain areas, such as Alba, Perigaud, China and Yunnan. , all located in calcareous terrain area.

The fruiting body of truffle is like a block, small like a walnut and big like a fist. When I was young, the interior was white and the texture was uniform. When it matures, it will turn dark black with a light marble texture.

Ascomycetes are spherical, oval, brown or brown, some as small as beans, some as big as Fuji apples, with polygonal warts on the surface, reflecting red luster and concave at the top; Its flesh (sporogenous tissue) is white at first, then turns brown or gray, and turns black when it matures; The cut surface is brown, similar to marble, giving off a moist smell like a forest, with the aroma of dried fruits, so as to lure small animals to look for things and take spores to other places to breed.

Truffles can be as small as peanuts or as big as handball. The growth cycle of truffles is only one year. Its size has nothing to do with age. Birth, illness, death and illness are only accompanied by changes in the four seasons. Generally speaking, black truffles mature from about 65438+February to March of the following year. Overripe truffles will rot and decompose.