Prevention and treatment of low temperature obstacle in Maize

Maize is a kind of temperature-loving crop, which has high requirements for temperature. in some years, low temperature will often lead to low temperature chilling injury of maize. Low temperature in the sowing period will delay seedling emergence, thin seedlings, reduce seed germination rate and so on. This phenomenon is called hypothermia disorder, so what to do about corn hypothermia barrier? Come and have a look with the editor.

1. Fine land preparation

In the north, soil preparation and fertilization should be made in autumn, and the soil should be raked and crushed to make ridges, and under irrigation conditions, the bottom water should be poured well in autumn and winter, timely suppression and fine raking, so as to avoid the loss of soil moisture, so as to achieve the level of the border, the fineness of the soil, the deficiency of the soil and the reality of the soil.

2. Select improved varieties

There are great differences in low temperature tolerance among maize varieties, so high-yielding varieties suitable for low temperature tolerance should be selected according to local conditions, and the sowing date should be determined scientifically according to climatic regionalization, and the appropriate time should be sowed early to meet the temperature index of each growth stage. The best temperature for seedling emergence from sowing branches is between 13 and 17 degrees, and the lowest temperature should not be lower than 10 degrees. The average temperature for silking of seedling branches should be higher than 24 degrees and not lower than 23 degrees. To facilitate photosynthesis, especially according to the high temperature in the later stage, the large temperature difference between day and night is conducive to the accumulation of dry matter.

3. Reasonable close planting

After emergence, the seedlings should be fixed at the right time, so that the density is suitable, and the plastic film mulching technology should be adopted, so that the plastic film is less and the management is convenient. Can take wide and narrow rows or large or small ridge planting method, that is, a large row spacing of 80 cm, a small row spacing of 25 cm, covering 2 rows of corn with a 75 cm wide film, and pressing the film into 10 cm on both sides. It is best to maintain 3800-4500 pigs per mu, so that the permeability is better, and sometimes it can increase production by 10% and 15%.

4. Early sowing and early mulching

Film mulching is generally ten and a half days earlier than the open field. After sowing, a ditch is opened on each side of the ridge, with a depth of about 5 centimeters. The plastic film is close to the ground, loose and tight, and the soil on the edge of the film is compacted so that the lighting surface of the film is more than 35 centimeters. For grass damage breeding, the ridge can be sprayed with chemicals, and then covered, can be excellent to prevent the breeding of weeds.

The above is the introduction of corn low temperature obstacle prevention and control methods, hope to help you, want to know more related knowledge, please pay attention to us.