August 02, 2025

How to avoid the corn growing season

Disaster relief for corn crops is crucial following natural events such as locust infestations, windstorms, and flooding. When corn is affected by locusts during the germination and emergence stages, it can lead to soil compaction, lower ground temperature, and poor air circulation, all of which hinder seedling development. After a disaster, it's essential to loosen the soil promptly to improve warmth and ventilation. Before the tasseling stage, especially during the "big bell mouth" period, if the male and female ears and some leaves are not fully emerged, they may be damaged by locusts. However, as long as the unexposed leaves and roots remain intact, timely cultivation and fertilization can help restore plant health, leading to a good harvest. Once the corn has headed, its ability to recover from damage is significantly reduced, resulting in greater yield loss. According to field surveys, corn that has been completely cut off by hail cannot resume growth, but if the ear section remains intact, immediate management efforts should be made to promote recovery and minimize yield loss. Windstorms, common in July and August, often cause corn plants to fall or break. If the plants are still immature, they should be lifted immediately to prevent back pressure and ensure proper photosynthesis. For fallen corn, if only the roots are affected, the plant can be straightened. In cases where the stem is broken, several plants can be tied together to provide support and encourage regrowth. Flood damage is another major concern for corn crops. Corn requires a significant amount of water, but it is not resistant to waterlogging. When soil moisture exceeds 80% of the field’s water-holding capacity, it can negatively impact plant growth, especially during the seedling stage. In the late growth phase, high temperatures combined with excessive rain can cause root suffocation and necrosis due to lack of oxygen, leading to rapid decline in plant vitality. This results in unripe, dry stalks, which greatly affects yield. Field studies show that corn exposed to water accumulation for one to two days around the tasseling stage has minimal yield impact. However, if the water is removed within three days, yield loss decreases by about 20%, and within five days, it drops by up to 40%. After flooding, it is vital to drain excess water from the field, reduce soil and air humidity, and encourage plant recovery. Timely soil cultivation helps break up crusted soil, prevent lodging, and improve soil aeration. Restoring root function is critical, and applying quick-acting nitrogen fertilizer can speed up plant recovery and reduce the overall impact of the disaster.

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