In the early growth stage of corn, particularly during the 4-6 leaf stage, it's common to observe red or purple discoloration in the leaves. This phenomenon is more frequently seen in fields growing Chinese cabbage or sugar beet. There are several reasons behind the appearance of purple seedlings in corn, and while physiological factors may play a role, the main causes include:
First, phosphorus deficiency in the soil. When corn lacks sufficient phosphorus, its carbohydrate metabolism becomes disrupted. As a result, excess sugars accumulate in the leaves, leading to the formation of anthocyanins—pigments that cause the leaves to turn red or purple.
Second, poor soil aeration and drainage. In low-lying areas where water tends to stagnate, root development can be severely hindered. This condition is often found in clayey, compacted, or poorly drained soils, which contribute to the appearance of purple seedlings. The lack of oxygen in the roots prevents proper nutrient uptake, further worsening the issue.
Third, exposure to low temperatures. After the emergence of corn plants, if they are subjected to cold weather, their leaves may turn red or purple. This is especially common in early spring when sudden temperature drops occur.
All three of these factors lead to poor root development, reduced growth potential, and stunted stems and leaves. As a result, the overall yield of the corn crop is negatively affected. It's important for farmers to identify the underlying cause of the purple discoloration and take corrective measures such as applying phosphorus fertilizers, improving soil drainage, or protecting young plants from extreme weather conditions. By addressing these issues early, growers can help ensure healthier, more productive corn crops.
North American Standard Light,American Standard Outdoor Lights,American Standard Lamps,North American Standard Lamps
Ningbo Royalux Lighting Co., Ltd. , https://www.royaluxlite.com