The nail opening of jujube tree

The nail opening of the jujube tree is a circular peeling, cutting off the phloem and cutting off the downward transport channel of the organic nutrients on the tree, so that the organic nutrients are temporarily concentrated in the upper part of the tree to meet the needs of fruit setting. After fruit setting, the nail mouth healed, and the channel for downward transport of organic nutrients on the tree was connected to meet the nutrition needs of fruit setting.