Corn is China's largest food crop and plays a vital role in China's food security. On the basis of selecting good varieties, reasonable water and fertilizer for corn, and wanting to stabilize production and high yield, the following three main points are as follows: one is weeding; the other is control prosperity; the third is the prevention and control of corn borer, planthopper and ear lice.

Among them, weeding and pest control, farmers have gradually become familiar with their skills during the years of planting. However, the technology of controlling plant growth regulators is still relatively unfamiliar to most people. Here, author focuses on corn. The key and significance of controlling prosperity.

The control of corn is dwarf and anti-fall in the traditional concept. Many people think that the more dwarf effect of the control products, the more the product is better, which gives a lot of opportunities for the bad products that simply pursue the dwarf effect. According to the transformation balance of vegetative growth (long tree) and reproductive growth (long grain) in plant growth and the reservoir-source theory, the crop should maintain an appropriate height and root, stem and leaf growth levels to ensure that the crop has sufficient nutrient sources, while Promote grain growth, accelerate nutrient accumulation to grain transport, and increase yield and quality.

Corn control time is the key. If the time of controlling the time is correct, not only can it control the market, it will resist the downturn, and it will stabilize the production. The most important thing is to significantly increase the output and get benefits. According to the growth rules of corn and the mechanism of action of plant growth regulators, as well as long-term field trials and local promotion experience, it is confirmed that corn control is mainly:

1. During the jointing stage, delay the internode elongation below the female ear, make the stalk thicker, enhance the mechanical toughness and transport nutrient speed;

2. The root system is developed, the gas roots are more, increase the ability to fix and absorb water and fertilizer;

3. Move the ear position down and lower the center of gravity.

From the above aspects, the ability to resist wind and fall is greatly improved. If the control time is not correct, the product is improperly used, it seems to be dwarfed, but it is easy to cause excessive control, premature aging, yellow leaves, poor growth of the top flower, etc., affecting the yield, resulting in small sticks, more baldness, and control Do not increase production or even reduce production.

Imagine that if the corn grows to 12 leaves, and then use the control products, the lower roots and stems have been formed, only to control the growth of the top core and even the smallpox, and it has no use against the wind, but it is only superficial. It was dwarfed after taking the medicine. In fact, the use of drugs at this time, just affect the growth of the top of the heart, so that the tassels are poorly developed, and even cause the tassels can not be properly extracted, which seriously affects pollination and seed growth, resulting in baldness and sputum, resulting in reduced yield.

Therefore, corn control time must be grasped in the 6-11 visible leaf period of corn, especially the 7-9 leaf period is the golden time to control and increase production.

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