Cutting Propagation of Tea Plant

Tea trees can be propagated by seeds or vegetative organs such as stems, leaves and roots for asexual reproduction (or vegetative reproduction). There are many methods of asexual reproduction, such as cutting, striping and so on. The method of asexual reproduction is mainly short-spike cuttage. Most tea varieties have the ability of both sexual and asexual reproduction. Asexual reproduction can protect the excellent characters of tea varieties, and the offspring have the same characters and high reproduction coefficient. However, there are many flower workers, the cost is high, and the requirements of seedling cultivation and management are high.

The main results are as follows: 1. the physiological basis of cutting rooting, the vegetative organs of tea trees have the function of natural physiological regeneration. That is, part of the organ is lost or mutilated, and under appropriate conditions, it can grow the lost or incomplete part and restore itself to its original intact state. Tea cuttage is to make use of the natural regeneration of tea plant vegetative organs and polarity phenomenon to cut the stems and leaves from the semi-lignified branches of tea trees and insert the lower end into the seedbed. After cultivation, they can take root and branch and form independent new tea seedlings.

The cuttings are inserted into the seedbed and the cells near the upper and lower incisions of the cuttings are quickly formed to close the upper and lower incisions. A callus cork is formed under the film, which is covered with an incision. Callus cork has protective effects such as preventing water loss and microbial invasion. At this time, under the appropriate temperature and humidity, after a certain period of time, the lower incision divides from the cambium and phloem parenchyma cells to produce callus. At the same time, new roots are emitted from the inner sheath of the central column, or from the intersection of medullary rays and cambium. This is the process of cutting rooting.

The content of carbohydrates in cuttings, including starch and sugar, is closely related to root formation. It is generally believed that the ratio of carbohydrates to appendicitis compounds (CPX N) is an important factor in the basis of health. A high ratio of carbon to nitrogen is beneficial to root and seedling growth. The experimental results show that when the branches and leaves turn reddish brown, semi-lignified and mature, the carbon and nitrogen are large, the survival rate of cuttings is high, the roots are good and the seedlings are strong.

The physiological process of cutting rooting is closely related to the humidity, temperature, air, light and soil physical and chemical conditions of the cuttings, which influence and relate to each other. In the process of cutting breeding, the relationship among ecological factors should be properly coordinated and the physiological characteristics of cuttings should be brought into full play.