Winter wheat fertilization characteristics

In the northern winter wheat area, it is generally planted early in the autumn and long in winter. Winter wheat is a crop that requires more fertilizer. Fertilization includes applying the base fertilizer, supplementing the seed fertilizer, and topdressing the fertilizer before winter.

From the emergence of the winter wheat to the jointing, the growth center of the plant is the tiller of the roots and leaves. Although the nutrient absorption is less from the emergence to the tillering stage, the application of sufficient base fertilizer has obvious effects on the growth and reproductive development of wheat. At this time, the level of phosphorus nutrition and the early and late supply time are most sensitive to the impact of wheat. Generally, the phosphorus is absorbed separately in the early stage, and the accumulation speed is fast. Therefore, in order to ensure good phosphorus nutrition in the early stage of wheat, the high-efficiency wheat fertilizer designed for the growth characteristics of wheat meets the demand for nitrogen, phosphorus and potassium in wheat, and can increase the cold resistance of wheat, which is conducive to the safe wintering of wheat and lays the foundation for the next year. basis.

After wheat returned to green, the absorption of nutrients such as nitrogen, phosphorus and potassium was more obvious than that of the previous period. At this time, it was also a key period for spring topdressing. From the jointing stage of wheat to flowering, the absorption rate of various nutrients increased the fastest, and it was also the topdressing of wheat field. The most important period. At this stage, it is mainly to strengthen the nutrition of nitrogen, in order to facilitate flower bud differentiation, increase the seed setting rate, and promote the large seeds of the ear. The specific dosage and date of application of jointing fertilizer should be flexibly controlled according to the situation of soil fertility and seedling conditions. In the late topdressing of winter wheat, “ double-linked ” wheat special fertilizer can be used , which not only increases nitrogen fertilizer, but also supplements phosphorus and potassium fertilizer. Increasing phosphorus and potassium fertilizer can also promote wheat powder and grain formation, increase grain weight and supplement nutrients. .