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When the corn grows to 5-6 leaves, according to the field growth and soil fertility status, the corn with weak seedlings should be used with 5-10 kg of urea per acre, combined with shallow cultivating and groundbreaking. At this time, the soil can also be cut off to cut off the soil capillary to protect the cockroach, which is an effective drought-resistance measure for drought-scarred areas.
When the corn reaches 10 leaves, the panicle fertilizer is applied to promote the long panicle, creating conditions for the formation of the big ear. The absorption of topdressing by corn plants often lags behind for a few days. The fertilizer that has just been applied cannot be immediately affected. At this time, the topdressing can provide nutrition for the growth and development of the panicles. Spike trifoliate is a functional leaf that directly affects the size and yield of corn ear. This top dressing is the key, and should be applied and applied. Generally, 15 to 20 kg of urea is used for topdressing.
In the period of corn tasseling, in order to ensure the fullness of the grain, it is also necessary to apply a strong seed fertilizer, generally 5 to 7.5 kg of urea. At this time, it can be supplemented with interlaced emasculation, remove the weak strains of the diseased plants and remove the diseased yellow foot leaves, etc., to improve the ventilation and light transmission in the corn field, to reduce pests and diseases and increase production.
Try the "leaf age mode" for corn topdressing
Before and after the seedling stage of corn, the topdressing of weaning fertilizer and marrying fertilizer is done. At the 3rd leaf stage of maize, the nutrients stored in the endosperm of the seed are exhausted. At this time, the root system of the plant is still underdeveloped, and the ability to absorb nutrients in the soil is weak. It is possible to apply a weaning fertilizer to the water with about 2.5 kg of urea per acre. The corn that is transplanted by the nutrition ball seedlings must be chased once before transplanting (2 leaves 1 heart to 3 leaves 1 heart).
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