Wheat seedlings are very sensitive to nutrient requirements. Sufficient nitrogen can make seedlings tiller early and promote the growth of leaves and roots. Phosphorus and potassium nutrition can promote the development of root system and improve the cold resistance and drought resistance of wheat.

Wheat needs more mineral nutrients, especially phosphorus and potassium. Nitrogen is mainly used to increase the number of effective tillers and the growth of stems and leaves, while potassium is used to promote photosynthesis and the toughness of wheat stem base tissue, and also to promote the nutrient movement in plants.

The nutrient supply after wheat heading directly affects the development of ear. Proper supply of nitrogen fertilizer can reduce the degeneration of florets and increase the number of grains per panicle. Phosphorus can obviously promote the formation and development of pollen grains and grain filling of adzuki bean. Potassium has a good effect on increasing grain weight and improving rice quality.

After flowering, the absorption capacity of wheat roots is weakened, and the nutrients in plants can be transformed and redistributed. However, in the later stage, proper amount of phosphorus and potassium fertilizer can be supplied by foliar spraying, which can promote the transfer of nitrogen-containing organic matter and sugar in plants to grains and increase the 1000-grain weight.

The normal growth and development of wheat also needs to absorb a small amount of trace elements. For example, zinc can increase the effective spike number of wheat, increase the number of grains per spike and increase the 1000-grain weight; Molybdenum can improve the effective tillering rate of wheat and increase the number of ears.