Tea event in August-cultivation

1. Judgment on the picking of three teas

This year's spring tea is a little later than in previous years, and it is expected that the birth of three teas will be too late. If the tree is strong and fertile, tea can be picked in the first ten days of August.

Due to the delay in the picking period of the third tea, the autumn buds in the autumn pruning period could not be sufficiently hardened, resulting in a reduction in the production and harvest of spring tea in the coming year.

30 days after the opening of new leaves, the leaf area reached the maximum, and then hardened completely, which took about 90 100 days. In the tea garden where the three teas are not picked, the branches will grow in early August, while in the autumn pruning period, the branches will be old and strong, which is conducive to the strong and tidy sprouting of spring tea in the coming year, so as to increase the income of spring tea.

2. Deep ploughing

Deep ploughing loosens the soil layer between tea rows, improves soil ventilation and water permeability, and promotes the development of root system.

Recently, the tea plant renewal interval is getting shorter and shorter, autumn pruning and other branches and leaves return to the tea garden, most organic matter accumulates in the tea line, such as this kind of tea garden with more branches and leaves, soil modifiers such as bitter soil lime (MgO) can be used to mix with organic matter among the tea lines to correct acid soil, which is conducive to promoting organic matter decomposition and improving the absorption and utilization of fertilizers.

(1) Deep ploughing period

Deep ploughing causes root cutting, so it should be carried out before the autumn when the tea tree absorbs nutrients vigorously, which is beneficial to the regeneration of new fine roots. Therefore, mid-August and early September is the best time for deep ploughing. The mountain areas and alpine tea gardens that come early in autumn should be carried out earlier.

(2) in dry situations, root cutting has a great influence on deep ploughing, and it is difficult to regenerate new fine roots, so deep ploughing should be stopped and shallow ploughing should be stopped.

(3) in the tea garden without deep ploughing for many years, there were more roots on the surface and more roots were cut off during deep ploughing. This kind of tea garden should be ploughed deeply in separate rows.

3. Drought countermeasures

Pay attention to the weather forecast and make drought prevention countermeasures as soon as possible when there is a tendency to drought.

The tea tree absorbs water from its roots and evaporates from its leaves to regulate its body temperature. Usually when it is hot in summer, the amount of water evaporated from the tea garden every day is about 7mm. Excessive drying stops the absorption of water by the tea tree, so the increase in leaf temperature causes the leaves to burn.

The tea gardens easily affected by drought are often young wood gardens with shallow effective soil, inconvenient irrigation and shallow root distribution.

Its drought prevention countermeasures are as follows:

(1) where the water conservancy condition is good, irrigate 2530 tons (25 30mm) at a time in a tea garden of 1000 square meters, usually once within 7 days. Irrigation is necessary when the PF value of soil moisture is more than 2.3. Earlier irrigation has a better effect on tea trees before they show symptoms of drought.

(2) in order to prevent the evaporation of soil surface water, the method of laying grass or covering plastic film between tea rows can be used. The young wood garden should be managed carefully.

4. Management of wood planting bed

In the seedling bed of cutting in summer, it began to root 20 or 30 days after cutting, and the first root was formed one and a half months later.

After the root comes out at one time, it is necessary to prevent the seedling bed from drying and irrigate in time. Fertilization began when the second root and the third root formed, about the first ten days of August. Excessive fertilization will cause fertilizer damage, and the mulch should be removed in cloudy days before the middle of September.