In the summer heat season, high temperature extremes sometimes occur. If the duration is long and there is little rain, drought and heat damage will occur in the tea trees. The specific reasons and preventive measures are as follows:
1, Causes and Symptoms of Dry Heat Damage
Cause: When the temperature exceeds 35°C for more than 5 days, and the soil lacks moisture and irrigation measures for a long time, drought damage will occur in the tea tree. If you continue to maintain high temperatures there will be heat damage.
Symptoms: After the tea tree suffered from drought and heat damage, the top of the tea plant showed wilting. The young leaves of the young shoots curled and curled, the color was yellow, the buds were crispy, and the young leaves were easy to fall off. The red leaves become red, gradually expanding from the middle, base and tip of the main vein. The color of the leaves changes from yellow to red to brown, and the entire leaf becomes agitated. The leaves roll inward until they fall off. In severe cases, the whole plant died of dryness.
2. Prevention and treatment of drought and heat damage
The first is to increase awareness of protection. In peacetime management, it is necessary to enhance the protection awareness of drought and heat damage of tea trees, protect the ecological environment of tea gardens, properly plant shade trees and shelter forests, improve environmental conditions, and improve drought resistance. At the same time, before the onset of heat and drought, the annual tea plantation cover, shallow ploughing and weeding should be carried out in May-June and August-September each year to improve the drought resistance of tea plants. The second is that tea trees that have suffered drought have been irrigated in the morning and at night. Conditions can be covered with shade nets to reduce direct sunlight and leaf moisture evaporation. Third, after the drought is lifted, crops should be properly pruned, and timely application of available nitrogen, phosphorus, and potassium fertilizers to promote the rapid restoration of tea tree vitality.
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