Tea tree drought-resistant and disaster-reducing foliar fertilizer spraying technology

First, the type of fertilizer

1. Urea: Urea is a quick-acting nitrogen fertilizer with a nitrogen content of more than 45%, which is a common fertilizer for leaf fertilization.

2. Potassium dihydrogen phosphate: Potassium dihydrogen phosphate is a quick-acting phosphorus-potassium compound fertilizer, which contains 51.7% of phosphorus pentoxide and 34.6% of potassium oxide, which is easily absorbed by plants.

In the production of tea, urea and potassium dihydrogen phosphate are suitable for foliar application. Foliar spray fertilizer allows fertilizer to directly enter the tea tree to increase the deficiency of nitrogen, phosphorus and potassium nutrients under drought conditions, enhance photosynthesis and improve the resistance of tea trees to high temperature. ability. Promote the synthesis and accumulation of sugar, improve the quality of tea, and achieve the purpose of ensuring production and quality.

Second, the spraying method

1. Spraying time: The fertilization of tea leaves should have obvious effect at a certain suitable temperature. Generally, it is sprayed in the morning and evening and cloudy days, and the effect is better; sunny days should be selected before 10:00 am and 4:00 pm Spraying later, it can be sprayed all day in cloudy weather.

2, spraying concentration: tea leaf surface fertilization concentration is generally 0.3% -0.5% urea plus 0.2-0.4% phosphorus dinitrogen potassium mixed application, avoid excessive concentration, otherwise it will cause the leaves to dry, curl or even fall off, aggravating drought.

3, spraying method: tea leaf surface fertilization should be sprayed from the back of the spray to facilitate the absorption of tea trees; for the tea garden during mining, pay attention to only spray the leaves, do not spray on the fresh leaves to be harvested.

4. Picking interval: After spraying the foliar fertilizer, it is usually picked after 5-7 days to benefit the fertilizer and improve the quality of the tea.
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