Tomato fertilization technology points

First, Fertilization at the Seedling Stage When the soil nitrogen (N) level is below 30 mg/kg and phosphorus (P) is less than 20 mg/kg, tomato seedlings tend to grow slowly and weakly. This makes it crucial to cultivate strong, healthy seedlings as a foundation for high yields. To achieve this, about 10–15 days before sowing, you can apply 100–150 kg of well-composted manure per 11 m². Mix in 0.15–0.23 kg of general calcium phosphate or 0.3–0.5 kg of superphosphate, along with 0.15–0.17 kg of potassium fertilizer (equivalent to about 0.3 kg of potassium sulfate). This helps enrich the soil and supports robust seedling growth. Additionally, applying 1 kg of a balanced N-P-K fertilizer (15:15:15) per 11 m² before planting can significantly improve seedling strength, fruit setting, and overall yield. If using nutrient blocks or seedlings, the transplanting process is smoother, and the seedling establishment phase is shorter, which can boost early yields. For preparing the culture soil, mix 50–60% peat, 25–30% horse manure, 15–20% garden soil, 20–30% charcoal, and 20–30% compost. Combine these thoroughly and fill into the seedbeds. Water, cut, or nurse the seedlings accordingly for optimal growth. Second, Fertilization Before Planting Before planting, it's important to re-apply decomposed organic fertilizer. Apply 75–105 tons of high-quality farmyard manure per hectare, along with 90–120 kg of phosphorus (equivalent to 750–975 kg of calcium phosphate or 195–255 kg of superphosphate), and 112.5–150 kg of potassium (equivalent to 225–300 kg of potassium sulfate). Adding phosphorus and potassium fertilizers alongside nitrogen can greatly enhance yield. Third, Top-Dressing After Planting 1. Seedling Booster: After planting, when the second set of leaves appears, apply 7,500 kg of diluted manure water per hectare or 15–30 kg of nitrogen (equivalent to 30–60 kg of urea or 70.5–142.5 kg of ammonium sulfate, or 43.5–87 kg of ammonium nitrate). This is especially important if the soil has low fertility or insufficient base fertilizer. 2. Fruit Promotion Fertilizer: When the first fruit cluster begins to swell, combine irrigation with fertilization. This stage accounts for 30–40% of the total top-dressing. Apply 7,500–15,000 kg of manure per hectare or 45–60 kg of nitrogen (equivalent to 90–135 kg of urea or 210–285 kg of ammonium sulfate). Avoid using ammonium nitrate later to reduce nitrogen leaching and nitrate buildup in the fruits. 3. Fruiting Stage Top-Dressing: During the fruiting period, the plant grows rapidly, and proper nutrition is essential. If nutrients are lacking, plants may decline early, leading to underdeveloped fruits and poor quality. Apply 2–3 rounds of top-dressing during the period when the first fruit turns white until the third fruit swells. Use 75–150 kg of nitrogen (equivalent to 165–330 kg of urea or 357–714 kg of ammonium sulfate). You can also spray 0.3–0.5% urea, 0.5% potassium dihydrogen phosphate, and 0.5–0.8% calcium nitrate 2–3 times. This helps maintain yield and reduces fruit diseases. [Comment] [Print this article] [Close this page] [Large, medium, small]

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