Corn field management technology: three major periods can not be ignored!

Mastering the technology of corn field management can greatly improve the yield of corn. What are the key points of corn field management technology? Let's give you a brief introduction.

I. Seedling stage management (seedling emergence ~ seedling extraction)

Seedling stage refers to the period from emergence to jointing, dominated by the growth of roots, stems and leaves. The management of this period is mainly to ensure the density of seedlings and whether the seedlings are neat, uniform and robust.

1. Check the fields to replenish seedlings

Because of seed quality and land quality and other factors, it may cause different degrees of seedlings, weak seedlings, diseased seedlings, insect seedlings and so on. At this time, you need to check the cornfield frequently in order to find the problems in the seedlings in time, and deal with them in time when you find them.

two。 Suitable time seedling, fixed seedling

The seedlings should be carried out at the three-leaf stage. Remove weak seedlings and retain strong seedlings; remove miscellaneous seedlings and retain seedlings with the same color; remove diseased seedlings and retain healthy seedlings. If the seedlings are not in time, the seedlings will be overcrowded during growth, insufficient sunlight, insufficient water and nutrients, which will lead to poor seedling growth.

II. Field management at heading stage (mid-term management)

Panicle stage refers to the period from jointing to heading, when stems and leaves grow vigorously, ear differentiation begins, and vegetative growth and reproductive growth are carried out at the same time. This is an important period of corn field management, mainly to promote stalk and strong ear.

1. Cultivate the soil by ploughing

Intertillage can loosen the soil, circulate the air, promote rooting and development, prevent lodging, facilitate drainage and irrigation, and bury weeds, creating good conditions for the growth of maize. Three times of intertillage is generally carried out at the seedling stage, the first at 4-5 slices of seedlings, with a depth of 3-5 cm; the second can be carried out at a height of about 30 cm, with a depth of 7-8 cm, and the third can be carried out before jointing, with a depth of 5-6 cm.

two。 Appropriate amount of topdressing

Large trumpet mouth stage can be an appropriate amount of topdressing, mainly in order to meet the needs of ear differentiation for fertilizer and water, improve the photosynthetic productivity of the middle and upper leaves, transport more nutrients to the ear, and promote the growth of large ears and more grains of corn. Urea 20kg / mu and potash fertilizer 5kg / mu can be applied.

Third, flowering and grain stage management (late management)

The flowering stage refers to the stage from heading to maturity, during which the vegetative growth of maize stops and takes grain development as the center. The management at this time is to ensure pollination and fertilization, promote grain filling and prevent premature senescence.

1. Timely drainage

In the process of corn growth, if Rain Water is dense and stagnant water in the field, it will cause insufficient oxygen in the soil, affect plant growth and easy to dump, affect photosynthesis, so timely drainage.

two。 Castration and pollination

Emasculation should be carried out in the heading period, every 1-2 lines to 1-2 rows, the side line, mountains, small plots of land can not be male, can not take leaves, otherwise the yield will be reduced.

Corn is an important food crop and feed crop, and it is also the crop with the highest total yield in the world. Only by mastering the technology of corn field management can we get twice the result with half the effort.