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Corn Chemical Control Prevents Production and Increases Production
In recent years, corn lodging has become a common issue in many corn fields. There are three main types of lodging: stem lodging, root lodging, and stem inversion. From my understanding, the widespread occurrence of corn lodging can be attributed to several factors. First, improper fertilization practices, especially an imbalance in the application of nitrogen, phosphorus, and potassium, have played a major role. Excessive use of nitrogen fertilizer leads to excessive vegetative growth, making the plants weak and prone to legginess. Second, incorrect timing of fertilization is another contributing factor. If no seedling fertilizer is applied during the jointing stage, it results in elongated and thin stalks. Third, overpopulation planting causes the field to close up, reducing air circulation and increasing the risk of lodging. Additionally, adverse weather conditions such as strong winds and heavy rain often exacerbate the problem.
In China, the use of chemical control technology has proven effective in addressing these issues. This method not only strengthens the corn stems and promotes a well-developed root system, but also enhances the plant’s resistance to lodging. It also deepens leaf color, thickens leaves, increases chlorophyll content, improves photosynthesis, and slightly reduces plant height by 10-15 cm. The ear position is lowered by about 10-12 cm, and internodes are shortened, creating an ideal high-yield plant with better ventilation and light penetration. This technique helps improve drought tolerance, disease resistance, and lodging resistance, while promoting reproductive growth and enhancing kernel size, number, and weight, and reducing the baldness rate. Farmers can increase planting density by 200-400 plants per acre, achieving yield increases of 15% to 30%, truly realizing the concept of "high yield in dense planting."
When using chemical control agents, there are several important points to consider. First, this technique is suitable for medium to late-maturing varieties grown on high-fertilized plots. However, it should not be used on low-yield fields, areas with poor seedling establishment, or plots where biomass is significantly deficient due to special conditions. Second, the spraying period and concentration must be strictly controlled. Repeated spraying or spraying the entire plant should be avoided at all costs. Third, it is important not to mix the chemical control agents with fertilizers or pesticides. Before and after spraying, equipment should be thoroughly rinsed with clean water.
The timing of the spray is crucial for the effectiveness of the treatment. The optimal time for chemical control is when the corn has between six to thirteen leaves, with the best window being from the eighth to the thirteenth leaf stage. In practice, how can you determine the number of leaves? A simple trick is to observe the development stages. Before the sixth leaf stage, the leaves are slender and smooth. Once the plant reaches the seventh leaf stage, the leaves become thicker, and small white hairs appear on the surface. You can easily feel this texture with your hand, which indicates the ideal time for applying the chemical control agent.
The principle of spraying is summarized as "not too low, not too strong, and not yellow." For high-fertilized fields or plots with tall stalks, the dosage should be increased accordingly. By following these guidelines, farmers can maximize the benefits of chemical control while minimizing potential risks.
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