Why do trees die without bark?

Because there is a layer of substance called "phloem" between bark and xylem, phloem contains sieve tubes for transporting organic matter, which can transport organic matter produced by photosynthesis of leaves to roots and other parts of plants. Therefore, if the bark is peeled off, the phloem will also be peeled off, which leads to the cutting of the sieve tube, the transportation mode of plant organic matter, and the plant organic matter can not be utilized by all parts of the plant. If the cut screen is too late to regenerate, it will lead to the death of the tree. So the most important function of bark for trees is to transport organic matter. Therefore, when mining natural rubber, rubber trees cannot be cut around, which will cut off all the sieve tubes.

In addition, bark can also protect the trunk, prevent cold and heatstroke, prevent water evaporation and prevent the erosion of bacteria and insects.