Fruit tree spring fertilization guidance
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Soil fertility in fruit trees is currently at a moderate level, with organic matter ranging from 11 to 15 g/kg, total nitrogen between 0.5 and 0.9 g/kg, available phosphorus from 15 to 30 mg/kg, and available potassium between 100 and 150 mg/kg. Fruit trees typically absorb nutrients in a ratio of 2:1:2 for nitrogen, phosphorus, and potassium respectively. Based on soil fertility levels, yield expectations, and current fertilization practices, it's estimated that an average of 25–40 kg of pure nitrogen, 10–20 kg of P₂O₅, and 20–40 kg of K₂O per acre is needed annually.
In spring, fertilization primarily involves chemical fertilizers. However, for fields that did not receive autumn compost, organic fertilizer should be the main component, supplemented with chemical inputs. The annual fertilizer input distribution is approximately 50–60% nitrogen, 20–30% phosphorus, and 30–40% potassium. For normal fruit trees, spring application should include 10–20 kg of pure nitrogen, 5–10 kg of P₂O₅, and 10–15 kg of K₂O per acre. Fertilizer rates should be adjusted based on tree condition—stronger trees may need less, while weak or high-yield trees require more. Soil nutrient content and previous year’s fertilizer use also play a role in determining the right amount.
To simplify the process for farmers, the Hebei Fertilizer Association has developed formula fertilizers, which are produced under expert guidance and strictly quality-controlled. These fertilizers are distributed through designated service stations, ensuring reliability and consistency.
Hebei experts in fertilizers and microorganisms have collaborated to create a line of functional fertilizers called "Wholehearted Partners." These products are enriched with essential nutrients, organic matter, humic acid, amino acids, proteins, and beneficial bacteria. They are specifically designed to address issues like yellowing leaves, leaf curl, fruit deformities, black heart, rot, and underground pests.
Spring fertilization should take place before flowering and after fruit set. The root zone of fruit trees, where absorption is most active, is typically found 10–30 cm below the canopy edge. Fertilization methods such as trench application, spot application, watering after spreading, or rotating tillage can be used, but care should be taken not to overwater.