Corn is a high-yielding, stable-grain food crop that is grown in many areas and has a high yield in cereals. From seeding to maturity, corn has to go through three stages and different growth stages. The fertility characteristics of each stage are different, and the management methods and main tasks are also different. Let's take a look at the management and fertilization techniques at all stages of corn.
First, the seedling stage
The seedling stage is the earliest growth period of corn. It refers to the period from the seeding and emergence of the corn to the period before the jointing. During this period, the corn is centered on the long roots and differentiates the stems and leaves as the vegetative growth stage. The characteristics of the seedling stage are: at this stage, the aboveground part of the corn grows slowly, while the underground root system develops faster, and a stronger root system is formed before the jointing. At this time, we should focus on promoting root development, cultivating strong seedlings, and achieving the purpose of early emergence, Miaoqi, Miaoyun, and Miaozhuang. This is a basic requirement for affecting later production, quality, and avoiding lodging.
Second, the stage of the ear
The ear stage is a very important growth stage of corn. It refers to the stage from the jointing of the corn to the tasseling stage and the stage of the corn. This period is the most prosperous period in corn, and the stage where water needs most fertilizer is the key period for field management. During this period, corn vegetative growth and reproductive growth progressed, stems and internodes rapidly elongated, leaves increased sharply, and male and female ears differentiated, requiring more nutrients in the field. The management center should promote the growth and enlargement of the leaves, and achieve the stalks and thick, and reach the high-yield posture of the spikes and the large ears.
Third, the flowering stage
This is the third growth stage of corn, which refers to the maturity from the tasseling to the corn kernel, which is the flowering stage of corn. The flowering stage is the late growth stage of corn. During this period, the vegetative growth gradually slows down and stops, with reproductive growth as the center.
During this period, the stems and leaves of the corn basically stopped growing, and the male and female flowers were extracted successively, followed by flowering and pollination. The grain began to form and grout until it matured. This stage is important for the formation of yield. The management is mainly done well, protecting the leaves and protecting the roots, preventing the premature aging of the plants, ensuring the multi-grain weight of the grains, thereby achieving high yield.
Fourth, fertilization techniques in various periods
1. Reapply the base fertilizer. The base fertilizer should be applied in combination with organic fertilizer and inorganic fertilizer. Generally, about 5,000 kg of high-quality organic fertilizer is applied to the mu.
2. Apply the seed fertilizer. Inorganic fertilizers and organic fertilizers can be used for fertilizers. It should be noted that when applying fertilizers, the fertilizers should be separated from the seeds and not mixed, and the depth of the fertilizer should be deeper than the seeds.
3, heavy application of joint fertilizer. After the jointing, the corn enters the two-wang period of stem and leaf growth and differentiation. It needs more nutrients. At this time, the fertilizer and water are sufficient, which can promote the elongation of stems and leaves and accelerate the differentiation of young ears. When the corn is jointed, the field has not been sealed, which is convenient for walking operation. Generally, about 50 kg of nitrogen and phosphorus compound fertilizer can be applied per mu.
4. Late application. Different earing differentiation at the ear stage still requires some nutrient support. However, at this time, the field has been closed and the plants are large, it is difficult to carry out mechanical operations, we can carry out artificial points. Generally, about 15 kg of diammonium is applied.
5. After the grouting, in order to prevent premature senescence and pests and diseases, nitrogen fertilizer, growth regulator and pesticide mixture can be used for foliar spraying to prevent and treat diseases and anti-aging.
The above is the introduction of corn management and fertilization techniques in various periods. To ensure high yield and high quality of corn, fertilizer is essential, and mastering fertilization technology is also crucial. I hope that the content shared by Xiaobian can help growers increase production and income!
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