Planting ginger deep ditch shallow cover yield high

Ginger sprouts slowly and requires a long time to emerge. During the spring months of April and May, when temperatures are still relatively low, farmers often use ridge furrows to help promote germination. Ginger seeds are typically sown in these furrows. However, traditional ditching methods usually involve shallow trenches, which can be problematic for soil expansion and the development of the ginger rhizome. To address this issue, a new method has been introduced—digging both deep and shallow ditches—to overcome these limitations and ultimately increase ginger yield. The specific method involves preparing composted soil fertilizer before deep ridging. The trench depth is increased to 25–30 cm, which is 10 cm deeper than the conventional approach. Before sowing, fertilization is concentrated in the trench. The amount of fertilizer applied in the furrow accounts for 50% of the total base fertilizer, with an emphasis on organic bio-fertilizers. For example, 200 kg of "Dingtai" brand prickly berry organic fertilizer combined with 20 kg of compound fertilizer can be placed at the bottom of the trench. After thoroughly mixing the soil and fertilizer, water should be poured into the trench one hour before sowing. The water should be sufficient but not so much that it seeps up through the ridge surface, as this could interfere with the smooth growth of the seedlings. Once the seeds are sown, the soil is covered using a two-tooth hook. The soil is placed near the bottom of the trench, covering the seeds, then the area is flattened. The covering layer should not be too thick, as excessive soil can lower the temperature and hinder germination. A thickness of about 4 cm is ideal. After sowing, a 1.2-meter-wide plastic film is tightly stretched over the ridges on both sides of the trench. Soil is then used to secure the film, maintaining a distance of approximately 20 cm between the trench bottom and the film. This helps raise the temperature within the trench, promoting faster and more uniform germination. Once the seedlings start to emerge and come into contact with the mulch, small holes are made to allow the plants to grow through. After most of the seedlings have developed, the mulch is removed, and the first earth covering is applied, about 4–5 cm thick. Subsequently, additional earth coverings are performed as needed, depending on how high the ginger shoots rise, to prevent the rhizomes from being exposed to sunlight, which could negatively affect their growth. (Dong Kefeng)

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