Wheat suitable for top-dressing joint fertilizer due to seedling system

Applying joint fertilizer to wheat can effectively promote the growth of wheat in the later period, and increase the grain growth to improve the quality. However, the top-dressing joint fertilizer should be due to seedlings, timely and appropriate. Wang Changmiao due to high soil fertility or too early planting caused by sowing. Before the jointing, there were more than 700,000 planting stems per acre, and the leaves were dark green, and the leaves were hypertrophic and drape-like. Most of them were susceptible to lodging due to serious diseases and insect pests in the middle and late stages. Therefore, for such wheat fields, nitrogen fertilizer should be controlled and avoid excessive water supply. Phosphorus and potassium fertilizers can be increased, 30 kg per mu of superphosphate, and 150 kg of wood ash can be used to increase the resilience of wheat. The robust seedlings population is of medium size, dark green leaves, and broad leaves but not drape. The total number of stems per acre before jointing is 600,000, and the average number of tillers per plant is 2-3. For such wheat fields, jointing fertilizers can be applied less or not. After jointing, if the leaf color fades, 5 kg of urea can be topped off. Booting stage can use potassium dihydrogen phosphate 0.3 kg per kg water 50 kg or combined with 1% urea to prevent pests spraying foliar. Thin and weak seedlings are caused by lean and fat or due to too late sowing. The leaves are narrow and straight and the leaf color is light yellow. The total number of stems per acre before jointing is less than 400,000. For such wheat fields, if the joint fertilizer is not applied in time or if fertilizer is applied too little or too late, it will seriously affect the growth of wheat in the later period. Therefore, in the middle and late January, Mushi urea 20 kilograms, phosphorus and potassium deficiency should also apply superphosphate 20 kilograms or potassium chloride 5 kilograms.