Cork, also called cork, is the bark product of the cork tree.

Cork is a processed and semi-processed product of bark harvested from certain special tree species.

Mature trees have an outermost layer of periderm, which is the bark we see, and it plays the same protective role as human skin.

Cork, also called cork, is the bark product of the cork tree. It is produced by the outward branching of the cork cambium. The main source tree species are domestic cork oak and foreign cork oak. The cork that is harvested for the first time is called primary cork, and the cork that is harvested again every 9 to 15 years is called recycled cork.

There is a saying that trees are "not afraid of hollowness, but afraid of peeling off". This is because when we peel off the bark, we will also tear off the phloem layer. The phloem layer is mainly responsible for transporting nutrients between roots and leaves. Damage to the phloem layer will cause tree death.

Among the vast number of tree species, only four trees have been found to be capable of this skill. The two most important ones are the European cork oak and the Chinese cork oak.

This is because the "bark" that can be easily peeled off is actually their cork, not the phloem that is responsible for the function of channeling nutrients and minerals. For plants with secondary growth, the rhizomes will form a tough periderm to replace the weak epidermis. The periderm is developed from the cork cambium with meristematic activity. They form the inner layer of the cork inward, which is composed of living cells; the cork is formed outward, and the cork cells die soon, forming the protection of the tree. natural barrier. After the European cork oak cork is stripped, the cork cambium layer will continue to form new corks, so it does not affect the normal survival of the tree.

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