Causes of Tea Tree Aging | Rejuvenation of the Old Tea Garden

Tea trees, like all woody plants, undergo a period of seedling, juvenile, adult and senescence in their lifetime. The time of this process can be as short as 20 to 30 years or as long as 100 years or more. After the tea tree ages, its growth is obviously weakened, its germination is less, its germination is late, its buds are thin, and the number of clips is increased. The surface of the tree is markedly increased, and some branches and leaves are dead, and there is direct extraction from the root neck. The phenomenon of natural rejuvenation formed a "two-story building" of the new and old leaf layers. The entire tea plantation, on the surface, is a scene of decline.

Causes of tea tree aging are mainly:
One is that the trees are old and naturally age.

The second is neglect of fertilizer management, tea tree not get enough nutrition, plus over-picking, causing premature aging.

Third, the site conditions of the tea are not good or bad. If the soil layer is shallow, there is a hard layer of soil in a decisive depth of soil layer, which is scientifically called "iron-manganese nodule layer" and affects the development of the root system; Or low-lying, often low-lying water, tea plantation damage, poor soil aeration, affecting root development, resulting in malnutrition, or soil acidity is not suitable for large classes, severe acidification or alkaline soil, not suitable for tea growth.

Fourth, tea plants are seriously endangered by pests and diseases, or improper use of pesticides to prevent and treat diseases caused by phytotoxicity; or improper use of fertilizer, resulting in fertilizer damage. After the tea tree ages, the yield is significantly reduced. Normally growing tea trees, dry tea produced in tea gardens are generally more than 100 kilograms. The yield of dry tea produced in the tea plantations in Pixian County can reach 200 kg to 400 kg or even higher. The output of aging tea gardens is often less than 100 kilograms per mu, and only about 20 to 30 kilograms. The aging tea plantation not only had a low yield, but also had a significant decrease in tea quality. The number of clips increased, the leaves were thin and the color of the leaves was yellow, and the content of quality components in the contained ingredients was significantly reduced. The tea leaves have a dark, low-aromatic, light taste and are not brewing. Because of the decline in tea production and quality, the economic benefits of tea gardens are greatly affected. Therefore, it is necessary to reconstruct the aging tea gardens.

The transformation of senile tea gardens generally begins with reform, land reform, and management reform. Tree replanting measures generally use heavy trimming and Taiwanese methods. After many years of harvesting and light pruning, the tea trees tend to be old. With pruning methods, tea trees cannot be restored to tree vigor and must be trimmed. The method is to cut off the upper branches and leaves from 30 cm to 40 cm above the surface after the spring tea. After one or two years of fat management, the tea trees will be able to grow in leafy state.

However, when the vitality of the tea tree is markedly declining, there are many dead branches, and the stalks are parasitism and there are many “lying twigs”. When it is opened into two layers of nan leaf canopy, the tea tree must be rejuvenated. Taiwan’s tea leaves are 5 cm to 6 cm away from the earth's surface after spring tea, and are cut to cut all shoots on the ground and strengthen management of fertilizers. Generally, after two or three years of recovery, the tea trees can grow stout branches with large branches and leaves, and their germination momentum is obviously improved. It seems that they are "rejuvenated." The reform of soil and management is to reconstruct poor soil conditions, adopt deep plowing, break down the soil-retaining layer and organic fertilizer of quadratic equation, open drainage ditch in low-lying land and remove accumulated water, and reform soil and soil with serious acidification or alkaline soil. For tea plants with severe pathogens and insect pests, the right medicine is used to prevent and treat diseases and insect pests. For those tea gardens where inferior varieties or varieties are mixed, alternative methods of replanting can be adopted to replant good tea varieties. Each cell of a plant has a complete, identical DNA sequence. When it leaves the maternal cell and is free from the binding of the original organ, it becomes free. Under the influence of certain nutrients and plants, the cell restores its genetic pluripotency and functions like a fertilized egg. This further grows into a complete plant.

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