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Ginger growth fertilization skills
Ginger fertilization is typically divided into two main stages: base fertilizer and top dressing. The base fertilizer includes organic manure, cake fertilizer, and chemical fertilizer. Organic manure is usually applied during soil preparation before planting. It is common to use 5 to 8 cubic meters of well-decomposed chicken manure per acre, which is thoroughly mixed into the soil. Cake fertilizer and chemical fertilizer are also applied in the planting furrow. Typically, 75 to 100 kg of cake fertilizer and 50 kg of a balanced nitrogen-phosphorus-potassium compound fertilizer (or 25 kg each of urea, superphosphate, and potassium sulfate) are used per acre.
In addition to the base fertilizer, three top dressings are generally recommended. The first top dressing, known as "strengthening seedlings," takes place when the plants reach about 30 cm in height and have 1 to 2 branches. This application mainly involves nitrogen-rich fertilizer, such as 20 kg of ammonium sulfate per acre. If the sowing was done too early and the growing period is longer, you can apply fertilizer 2 to 3 times during watering, using the same amounts.
The second top dressing, called "turning fertilizer," is carried out just before and after the start of autumn. This is a critical growth phase for ginger, where nutrient uptake increases significantly. After this stage, the plant grows more rapidly, and most nutrients are directed toward the development of the rhizome. To support high yields, weeding should be done, followed by applying 70 to 80 kg of crushed cake fertilizer, 3 to 4 cubic meters of decomposed chicken manure, and 50 to 100 kg of compound fertilizer (or 20 kg of urea, 30 kg of diammonium phosphate, and 50 kg of potassium sulfate) around the base of the plants. A small ditch is dug 15 cm away from the roots, the fertilizer is placed inside, mixed with the soil, and then covered.
The third top dressing, referred to as "Zhuang Jiang Fei" or "Strengthening Ginger Fertilizer," occurs in early September when the plants have 6 to 8 branches and enter a rapid growth phase. At this time, 25 to 30 kg of compound fertilizer per acre, or 2.5 kg of ammonium sulfate and potassium sulfate, is recommended. For fields with high soil fertility and vigorous plant growth, it's better to reduce or avoid nitrogen fertilizer to prevent excessive leaf growth that could hinder rhizome development.
Zinc and boron fertilizers can also be applied as either base or top dressing. In areas deficient in these micronutrients, 1 to 2 kg of zinc sulfate and 0.5 to 1 kg of borax per acre are typically mixed with fine soil or organic manure and applied to the planting furrow. For foliar applications, a 0.05 to 0.1% borax solution (50 to 70 liters per mu) can be sprayed at key growth stages—seedling, tillering, and rhizome expansion. Alternatively, 800 grams of zinc-based fertilizer per liter of water and 200 grams of large-grain boron per liter can be used to enhance yield and prevent diseases like rickets in ginger.
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