Recently, strong convective weather has occurred frequently, and excessive rainfall can easily induce waterlogging in tea gardens and cause tea tree moisture damage. Even if the Tea Pruner Trimmer is used to prune the tree crown and improve the fertilization level after the moisture damage, it is difficult to change the low yield of the tea garden, and even gradually die.
The main symptoms of tea tree moisture damage are few branches, sparse buds and leaves, slow growth or even cessation of growth, gray branches, yellow leaves, short trees and many diseases, some gradually die, few absorbing roots, lateral roots cannot stretch, shallow root layer, and some lateral roots do not grow downward but grow horizontally or upward. Use a cultivator machine to loosen the soil, so that more oxygen enters the soil and improves the absorption capacity of tea trees. In severe cases, the outer bark of the conducting root is black, not smooth, and has many small tumor-like protrusions. When moisture damage occurs, the fine roots deep inside are affected first. Due to the damage to the underground part, the tea tree loses its absorption capacity, and the growth of the aboveground part is gradually affected.
Causes of moisture damage:
When there is water accumulation in the tea garden, use a water pump to pump out the water in time. The fundamental reason for the occurrence of moisture damage to tea trees is that the ratio of soil moisture increases and the ratio of air decreases. Due to insufficient oxygen supply, the root system has difficulty breathing, and the absorption and metabolism of water and nutrients are blocked. Under such conditions, the soil environment deteriorates, the effective nutrients decrease, the toxic substances increase, and the disease resistance of tea trees is low, which causes the peeling, necrosis and rot of tea roots. This phenomenon is more common when there is non-flowing water in the soil.
Elimination of moisture damage
Because moisture damage often occurs in flat land or artificially filled ponds and depressions, or there is an impermeable layer under the cultivated layer, and the waterlogged tea gardens at the foot of the mountain or in the col. Therefore, when preventing moisture damage, corresponding measures should be taken according to the cause of the occurrence of moisture damage, lowering the groundwater level or shortening the retention time of runoff in low-lying areas.
When building a garden, if there is an impermeable layer within 80cm of the soil layer, it should be destroyed during reclamation. For areas with hard disk layers and sticky disk layers, deep cultivation and breaking should be carried out to keep no water in the 1m soil layer. If the hard layer of the tea garden is not broken at the beginning of construction, if an impermeable layer is found after planting, a tea garden tiller should be used in time to deep plow between the rows to remedy the situation.