What are the drought-resistant measures for corn in the late growth stage
When the climate is dry, corn in the late stage often persists because of insufficient water, especially during the corn filling stage, which is the period with the greatest demand for water and also the period most sensitive to water shortage. In order to cope with drought, scientific field management should be used to resist disasters and reduce losses and ensure a bumper corn harvest. Follow along with the editor to learn more below.
1. Irrigate early
Make full use of water-saving projects, give priority to ensuring water use for high-yield fields and fields at the critical point of water shortage, and at the same time, according to seedling growth and changes in soil moisture, promptly adopt light irrigation with a small amount of water to maintain normal filling and grain setting of the plants. Where conditions permit, drip irrigation, sprinkler irrigation, and furrow irrigation can also be used to replenish water in time and expand the irrigated area.
2. Topdressing to promote growth
In combination with irrigation, promptly apply ear and grain fertilizer. Generally, apply 10-20 kg of urea per mu, paying attention to side-deep application and avoiding surface broadcasting, to promote downward root growth, enhance the roots' ability to absorb water and nutrients, and make the stalks thick and strong. In the late filling stage, foliar fertilizer or plant growth regulators should be sprayed in time, applying 0.5-0.7 kg of urea plus 0.2 kg of potassium dihydrogen phosphate per mu, diluted with 50-100 kg of water. This can both lower temperature and increase humidity, and at the same time increase the moisture of the ears and leaves, accelerate irrigation and maturity, and increase grain number and grain weight.
3. Scientific field management
After 1-2 days of irrigation, shallow plowing should be carried out once to break up soil compaction and reduce water evaporation. In the late growth stage, measures such as loosening autumn ridges, cutting empty plants, and removing lower leaves can be used to improve field ventilation and light penetration, reduce the possibility of disease infection, and ensure full filling. For corn fields with severe yield reduction where grains can hardly form, carry out silage in a timely manner to reduce losses to the lowest possible level.
4. Prevent and control pests and diseases
Closely monitor the occurrence trends of pests and diseases such as corn borer, third-generation armyworm, aphids, and leaf spot disease, and start prevention and control work in a timely manner. When using chemical agents for control, grasp the timing and dosage of application appropriately, appropriately increase the number of applications, reduce the concentration of the agent, and improve the control effect.
The above is an introduction to drought-resistant measures for corn in the late stage. I hope it can help you. To learn more related knowledge, please follow us.