What are the missing reasons for corn lodging

Corn lodging is usually related to nutrient deficiencies such as potassium, silicon, and boron, and may also be caused by poor lodging resistance of the variety, high planting density, and invasion of pests and diseases. The issue of lodging needs to be comprehensively judged through soil testing and field management.

1. Potassium deficiency

Potassium can enhance the mechanical strength of corn stems. When potassium is deficient, the plant cell wall becomes thinner and the stem flexibility decreases. Manifested as burnt edges on the lower leaves and easy breakage of the stem base. It can be supplemented by adding plant ash or potassium sulfate fertilizer, while avoiding excessive use of nitrogen fertilizer.

2. Silicon deficiency

Silicon element deposits in maize epidermal cells to form a silicified layer, significantly enhancing lodging resistance. Silicon deficient plants have slender stems and drooping leaves. Returning rice straw to the field or applying silicon calcium fertilizer can improve the situation, especially in sandy soil where the effect is significant.

3. Boron deficiency

Boron participates in lignin synthesis, and boron deficiency can lead to poor vascular bundle development and stem hollowing. The typical symptoms are necrosis of growth points and shortening of internodes. Spraying borax solution on leaves can quickly remedy the problem, but the concentration needs to be controlled to avoid drug damage.

4. Variety factors

Some corn varieties have shallow root systems, high plant height, and high ear position, resulting in poor innate lodging resistance. It is advisable to choose hybrid varieties with short stature and low ear position, such as Xianyu 335. Before sowing, it is necessary to understand the characteristics of the variety to avoid blind introduction.

5. Improper management

Excessive planting leads to excessive plant growth and weak stems; Excessive nitrogen fertilizer leads to vigorous growth; Improper irrigation causes shallow rooting of the root system. It is recommended to plant in a wide and narrow row, control prosperity during the period of large horn mouth, and cultivate soil in the middle to enhance support. Key monitoring points for pest control include stem rot and corn borer.

Comprehensive management strategies need to be implemented to prevent corn lodging. Before sowing, deeply plow the soil and apply organic fertilizer to improve soil structure. During the growth period, fertilizer should be applied reasonably according to the growth status, with special attention paid to the supplementation of potassium fertilizer. In case of strong wind and rain weather, anti lodging regulators can be sprayed in advance. After lodging occurs, plants with mild lodging can naturally recover, while those with severe lodging need to be manually lifted and stabilized with soil. Analyze the reasons for lodging after harvest and establish field records for adjusting planting plans in the following year.