Key points of Maize Management Technology

Seedling management: from seedling emergence to jointing stage, it is necessary to check and replenish seedlings in time, and remove weak seedlings and retain strong seedlings. Field management at heading stage: from jointing to heading stage, three times of intertillage can be carried out when the seedlings grow to 4-5 pieces, the seedlings grow to about 30cm, and before jointing. Trumpet mouth stage management: 20-25kg urea and 5-10kg potash fertilizer can be applied. Flowering and grain stage management: timely drainage when it rains, and emasculation in the heading period.

I. Management at seedling stage (from emergence to seedling extraction)

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

1. Check the fields and replenish the seedlings

Due to seed quality and land quality and other reasons, it may lead to different degrees of weak seedlings, diseased seedlings, insect seedlings, seedlings and so on. During this period, it is necessary to check in the cornfield frequently, which is helpful to find the problems of seedlings in time and replenish seedlings in time.

2. Suitable time seedling and fixed seedling

It is necessary to carry out inter-seedlings in the three-leaf stage, during which weak seedlings should be removed, then strong seedlings should be retained, miscellaneous seedlings should be removed, seedlings with the same color should be retained, and diseased seedlings should be removed and strong seedlings should be retained. If the seedlings are not in time, the seedlings will be crowded in the growth stage, resulting in uneven light and inadequate water and nutrients, which is not conducive to the growth and development of seedlings.

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

Panicle stage refers to the stage from jointing to heading, when stem and leaf growth is prosperous, ear differentiation is carried out gradually, and vegetative growth and reproductive growth are carried out at the same time, which is also an important period for maize field management, mainly to promote stalk and strong ear.

1. Cultivate the soil by ploughing.

Middle tillage can loosen soil, promote plant rooting and development, avoid lodging, and facilitate drainage, irrigation and burying weeds. Three times of mid-tillage are usually carried out at seedling stage, the first time can be carried out when the seedlings are 4-5 pieces, the depth is about 3-5cm, the second time can be carried out when the seedlings grow to about 30cm, the depth is about 7-8cm, the third time can be ploughed before jointing, the depth is about 5-6cm.

2. Appropriate amount of topdressing

During the period of big trumpet mouth, corn can be fertilized appropriately, mainly to supply the demand of fertilizer and water for ear differentiation, and to improve the photosynthetic productivity of the middle and upper leaves, so that more nutrients are transported to the ear, and the corn ear is larger and more grains are promoted. Generally, 20-25kg urea and 5-10kg potash fertilizer can be applied per mu.

Third, flowering and grain stage management (late management)

The flowering stage refers to the stage from heading to maturity, when the vegetative growth of maize stops, mainly focusing on grain development. The management is to ensure pollination and fertilization and promote grain filling to prevent premature senescence.

1. Timely drainage

During the period of corn growth, if there is a rainy season, it will make the field stagnant water, and lead to insufficient soil oxygen, which is not conducive to plant growth, and easy to dump, so it should be drained in time.

2. Castration and pollination

You can choose to emasculate in the heading period, removing 1-2 rows every 1-2 rows, mountains and small plots of land can not be male, when male, can not take leaves, otherwise it will lead to a reduction in production.