The characteristic of fertility at the corn ear stage is vegetative growth and reproductive growth. The growth center is turned from roots to stems and leaves. Tassels and ears have started to differentiate and plants have entered a period of rapid growth. The contradiction between the growth of roots, stems, and leaves and the differentiation of spikes competing for nutrients and moisture is prominent at this stage, and it is the critical period for top-dressing irrigation.
First, the main attack target: control culm, ear, plant robust, lay the foundation for large grains and large.
Second, high-yield appearance: plant piers are thick, strong roots, aerial roots, short base internodes, leaf width, dark green leaves, the upper leaf growth concentration, the rapid formation of a large bell, the male and female ear development is good.
Third, management measures
(1) Digging soil: Combine with the cultivating management to open up the soil, which can increase the pressure of weeds, increase the temperature of the ground and thicken the soil layer in the roots of the corn. It is conducive to the formation and extension of aerial roots, prevents the lodging of corn, and is conducive to irrigation. ,drain.
(2) Appropriate top-dressing: This period is in the critical period of maize water requirement and fertilizer, which is a critical period for the formation of large spikes and many grains. It is necessary to reapply nitrogenous fertilizer. Combined with the ditch, Mushi nitrogen fertilizer is about 40 kg and the top dressing depth is 5cm.
(3) Timely irrigation: After the completion of trenching, it should be timely watered according to the weather, soil moisture and corn.
(4) Prevention of pests and diseases: The main pests at the ear stage are corn borers, cotton bollworms, red spiders, aphids, and leafhoppers. In this period, field monitoring should be strengthened and agricultural investigations should be conducted to find out that pests and diseases need to be prevented and treated in a timely manner.
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