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Ginger is the key to high-yield fertilization
During the entire growth cycle of ginger, nutrient requirements change significantly depending on the stage. In the early seedling phase, the demand for nitrogen, phosphorus, and potassium is relatively low. However, as the plant progresses into the later growth stages, the need for nitrogen and potassium increases dramatically, while phosphorus uptake gradually rises. Therefore, effective fertilization should be tailored to the specific nutritional needs of ginger at each growth stage.
1. **Apply Base Fertilizer**: Since ginger primarily relies on nutrients during its mid to late growth stages, applying a rich base fertilizer is essential for high yields. Before planting, it's recommended to mix 500–600 kg of well-rotted chicken manure with high-quality compost per acre. Additionally, 75–100 kg of cake fertilizer, along with 50 kg of NPK fertilizer or 15 kg of urea, 30 kg of superphosphate, and 20 kg of potassium sulfate can be applied. For soils deficient in micronutrients, add 1–2 kg of zinc sulfate and 0.5–1 kg of borax (0.05–0.1%) per mu to the base fertilizer.
2. **Use "Strong Seedling Fertilizer"**: During the seedling stage, plants grow slowly and require minimal fertilizer. However, since this stage can last a long time, it’s important to support healthy growth. When the seedlings reach about 30 cm tall and have developed 1–2 branches, apply 20 kg of ammonium sulfate or diammonium phosphate per acre. If the sowing was done too early and the seedling period is extended, you can apply the fertilizer 2–3 times with irrigation to ensure steady development.
3. **Reapply "Fork Fertilizer"**: Around the beginning of autumn, when ginger enters a rapid growth phase and starts accumulating nutrients, it’s crucial to provide additional nourishment. Combine this with weeding and soil cultivation, and apply a manure-based fertilizer to the sides of the plants. Typically, 60–80 kg of crushed cake, 250–300 kg of decomposed chicken manure, and 50–80 kg of compound fertilizer (or 10 kg urea, 25 kg diammonium phosphate, and 25 kg potassium sulfate) are used. Dig small trenches near the plants, sprinkle the fertilizer inside, cover with soil, and water thoroughly.
4. **Apply "Inflated Fertilizer"**: When the plant has 6–8 branches, usually around the White Dew to Autumn Equinox period, ginger enters the rhizome expansion phase. At this point, a strong fertilizer application is necessary. Apply 25–30 kg of compound fertilizer per acre, or a mix of 2–3 kg of ammonium sulfate and potassium sulfate. If the soil is already fertile and the plants are vigorous, avoid excessive nitrogen to prevent excessive leaf growth that could hinder rhizome development.
5. **Use Foliar Fertilizer**: For soils lacking micronutrients like boron and zinc, foliar sprays can be applied during the seedling, splitting, and rhizome expansion stages. A solution of 1–2 kg of zinc sulfate and 0.05–1 kg of borax per 100 liters of water can be sprayed directly onto the leaves to improve nutrient absorption and overall plant health. This method ensures quick availability of essential elements, especially when soil conditions are not ideal.