To prevent the fall of wheat in the spring
2025-08-06 08:53:31
In the middle and later stages of wheat growth, local or widespread lodging often occurs, which significantly impacts grain filling and reduces grain weight, ultimately leading to lower yields. According to field surveys, the average yield loss per hectare due to lodging is approximately 40 kg, directly affecting the stability and high productivity of wheat crops.
One of the main causes of wheat lodging in spring is improper agricultural practices. For example, excessive seeding density can lead to overly long internodes, especially during the top-dressing stage. This results in weakened stem walls and reduced resistance to lodging. Additionally, a decrease in sugar accumulation in the stem during the first internode phase further weakens the plant's structural integrity.
To prevent lodging, proper fertilizer management is essential. High-yield wheat fields should be watered appropriately, avoiding unnecessary irrigation such as "Qingshui" or "wheat yellow water." During the green-up period in spring, watering without fertilizers is recommended. After the jointing stage (when two leaves are exposed), a second round of irrigation should be applied along with balanced NPK fertilization to shorten the base internode length. The ideal length for the first internode should be between 4.5–5.7 cm, and the second internode between 7.6–8.5 cm, which enhances lodging resistance. Late-season irrigation must be carefully timed based on weather forecasts, following the principle of stopping before wind or rain occurs.
Another effective measure is the application of growth regulators. Before the jointing stage, spraying 15% paclobutrazol powder (50–60 grams per 40–50 kg of water) helps control excessive growth and shortens internode length. Alternatively, using 20% Zhuangfengan emulsion at a rate of 30–40 ml per acre mixed with 25–30 kg of water can effectively control the elongation of the base internodes without affecting overall growth, resulting in stronger stems and increased yield by 8–13%. Other foliar fertilizers like chlorella, chitosan, Tianwei, and Dielkin also show positive effects in reducing lodging risk.
Disease and pest control are equally important. Preventive measures should be implemented for diseases such as wheat sheath blight, powdery mildew, and aphids. Timely application of appropriate pesticides when thresholds are reached can improve the plant’s resilience and reduce the likelihood of lodging. A comprehensive approach that combines cultural, chemical, and biological methods ensures better crop health and higher productivity.
Animal Medicine Premix,Tilmicosin Premix,Tylvalosin Tartrate Premix,Animal Products Medicine
Sichuan Aibang Weiye Biological Engineering Co., Ltd. , https://www.aibangpharm.com