The Best time for Maize topdressing the Best time for Corn Chemical Control

Corn is a very common food, which can be seen in both large and small markets in our country at present. There are a lot of people growing corn now, but when planting, fertilization is very important. However, when fertilizing, there are also some tips, especially in the time to pay more attention, let's take a look at it!

The best time for topdressing corn

The best period of topdressing for maize is from jointing to panicle differentiation (June 20-27), when 7-12 leaves have been unfolded, which is the key period to determine ear length and diameter from female ear growth and elongation to female floret differentiation. Topdressing can meet the nutrient needs of jointing and booting, promote ear differentiation and make maize ears larger and more grains.

The best time for corn chemical control (boom control)

The available period of corn control agent is 6-13 leaf stage (fully unfoliated leaves), and the best period is 7-9 leaves, that is, the height of corn is about 60-70 cm (above knee and below waist). This period is the early jointing stage of corn. After spraying, the stem of corn can be thickened, the internodes can be shortened, the ear position and plant height can be reduced, and the number of layers and strips of "bully root" can be increased, which can effectively prevent the lodging of corn. It can also promote the movement of nutrients to the ear and reduce the number of empty trees and bald tips.

The method of topdressing Corn

The main results are as follows: 1. There are three common methods of topdressing in corn production, that is, spreading fertilizer on the ridge, then ploughing and covering the soil immediately, deep application of the planing pit between the plants of the artificial ridge, covering the soil and then ploughing the ground, and topdressing in the ridge and furrow. The best effect of these three topdressing methods is artificial ploughing and trench covering, which will achieve a good application effect because of deep fertilization, strict coverage and high fertilizer use efficiency, which will increase the yield by 2% and 11% compared with the application of fertilizer on the ridge.

2. The second is ridge and furrow topdressing, which has the advantage of saving labor and effort, and the disadvantage is that the fertilizer is a little far away from the dense area of root system, which is not conducive to the full absorption of fertilizer by maize root system. Therefore, it is necessary to cover the soil after ploughing the shallow furrow and cover the fertilizer strictly to avoid volatilization and waste. Ridge spread sometimes due to lax ridge sealing, fertilizer exposed outside, resulting in serious loss and waste. Maize topdressing depth, distance from the plant should be 7-10 cm, this is conducive to the absorption and utilization of maize roots, if more than 10 cm will affect the effect of fertilizer application, less than 5 cm will cause burning seedlings. Cover soil in time or combine with shovel to cover soil in time after fertilization.

What kind of chemical fertilizer is used for topdressing corn?

Topdressing mostly uses urea or compound fertilizer, and its amount varies with different spring and summer corn.

1. The amount of spring corn is generally about 33.0% of the total amount of nitrogen fertilizer. For soils with partial sand texture and poor fertilizer conservation performance, the amount of topdressing can account for about 50% of the total amount of nitrogen fertilizer. Summer corn due to stubble re-sowing, generally do not apply base fertilizer, the amount of fertilizer is not large, topdressing is even more important, most or all of the nitrogen fertilizer is used as topdressing.

2. The topdressing must be guaranteed twice, and the first time, after the seedling is fixed, we should pay close attention to promoting the seedling fertilizer. This time, the topdressing should be based on nitrogen and phosphorus quick-acting chemical fertilizer, which can achieve the goal of both seedling emergence and stable growth.

3. The second topdressing should be in the big trumpet stage after jointing, mainly heavy topdressing nitrogen fertilizer, and the amount of nitrogen fertilizer should be twice as much as that of the first nitrogen fertilizer, so as to ensure the large amount of nitrogen in the panicle differentiation stage. Topdressing should take the method of hole covering soil to put an end to spreading and surface application, so as to prevent volatilization from causing waste.

The fattest time for corn is usually in early summer, and it depends on the conditions to apply fertilizer. There are also some choices of fertilizers for topdressing, and the fertilizers chosen in different periods are also different. Corn boom control is also an aspect of ensuring its quality, and it also depends on the time. In the above, there are some detailed introduction, I hope it can be helpful to you.