Characteristics and Scientific Application Methods of Tea-Specific Fertilizer

Tea-specific fertilizer is a special fertilizer designed for the growth and harvesting characteristics of tea plants (Camellia sinensis). It is generally based on nitrogen fertilizer, combined with phosphorus, potassium and medium and trace elements, and can simultaneously meet the needs of tea plants for budding, leaf growth and maintaining tree vigor. Tea plants are crops mainly harvested for their tender buds and young leaves, so they have a relatively large demand for nitrogen and also have certain requirements for soil pH. Therefore, this type of fertilizer is clearly different from ordinary compound fertilizer in its formula.

Most tea-specific fertilizers use a potassium sulfate-based formula and contain no chlorine or low chlorine, because tea plants are relatively sensitive to chloride ions, and applying chlorine-containing fertilizers can easily affect the normal growth of tea plants. Some products also add medium and trace elements such as magnesium, zinc and sulfur to help improve leaf color and aroma performance. When used in tea gardens with acidic and slightly acidic soil, it can better maintain nutrient balance.

In terms of application, it is emphasized that fertilization should be carried out in stages. In late autumn and early winter, it is applied deeply in furrows together with organic fertilizer as a base fertilizer; before tea buds sprout in spring, a bud-promoting fertilizer is applied as a top dressing; and after each round of picking, nutrients are appropriately supplemented. The fertilization position is generally arranged near the drip line of the canopy in shallow furrows, and after application the soil is covered and watering is combined, avoiding direct contact between fertilizer and roots. The amount used should be flexibly adjusted according to tree age, growth vigor and soil fertility, and it is not advisable to apply too much at one time.

Rational use of tea-specific fertilizer can make new shoots sprout uniformly and leaves thick, which helps improve the quality of fresh leaves and stabilize yield. It should be noted that special fertilizer cannot completely replace organic fertilizer. Long-term single application of chemical fertilizer can easily cause soil compaction and aggravated acidification. It is recommended to apply chemical fertilizer together with decomposed organic fertilizer, and to pay attention to daily fertility management of the tea garden.