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Heavy application of panicle fertilizer Because of the need for fertilizer in autumn corn, it has the characteristics of less early stage and more late stage. Therefore, in order to obtain high yield of autumn corn, it is necessary to reapply the ear attack fertilizer to meet the demand for nitrogen fertilizer from the tasseling stage to the mature stage. The application of panicle fertilizer is generally applied 12 days before the tassels, 40 kg of ammonium bicarbonate or 15 kg of urea per acre, deep application around the roots, and soil application after application. In case of dry weather, watering or watering (ditch irrigation) after fertilization promotes rapid decomposition and absorption of fertilizer.
Appropriate application of fertilizers Due to the high temperature and short growth period in the early stage, the vegetative growth period is shortened, the growth is insufficient, the plants are short, and the photosynthesis area of ​​the leaves is relatively reduced. Therefore, it is essential to apply fertilizer. It is advisable to take the tassels, flowering and silking stage, depending on the growth of corn, apply 5-8 kg of urea per mu.
Controlling aphids Late autumn corn is mainly caused by corn borer damage. At the end of corn heart leaf, 150 ml of BT emulsion, 1 kg of water, 15 kg of fine sand, formulated into granules for pest removal or 800% dichlorvos emulsion 800 times in sunny afternoon, sprayed corn at 75 kg per mu. Filaments at the top of the ear and the leaf axils of the upper and lower leaves of the ear.
Grasping the late fertilizer and water management of autumn corn is an important part of capturing high yield of autumn corn. This autumn, corn planting area is more, but due to the influence of rainy weather during the growing period, the field has high humidity, unbalanced growth, poor root development and short stigma. At present, we should do the following three management measures:
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