Spring wheat has an early sowing date, a short growing period, and a fast growth rate, so it needs more fertilizer.
Spring wheat needs enough nutrients such as nitrogen, phosphorus, and potassium. Nitrogen can promote the tillering of spring wheat and the growth of stems and leaves, strengthen photosynthesis, and accumulate more nutrients. Adequate nitrogen is beneficial to increase, increase grain, and increase weight; when nitrogen is insufficient, the plants are short and thin, with few tillers, and the leaves are light in color. The lower leaves are easy to pick up and turn yellow to death. Too much nitrogen makes the stems and leaves grow long. It is prone to lodging and greediness. Phosphorus can promote the normal metabolism of sugar and protein in spring wheat plant, promote rooting, tillering, flowering and early maturing; when phosphorus is insufficient, it shows poor root development, dark or reddish leaf color, weak photosynthesis intensity, heading Flowering is postponed, grain is not full, and quality is poor. Potassium can promote the formation and operation of carbohydrates in spring wheat plants, can make the stems robust, and later can promote grain filling. When the potassium is lacking, the leaves are easy to lift and the grain is not full, and the stems are fragile and prone to lodging. Therefore, nitrogen, phosphorus, and potassium must be used in conjunction with fertilization in order to coordinate plant carbon and nitrogen metabolism processes and promote the normal growth and development of spring wheat.
Spring wheat is a crop that requires more fertilizer. For every 100 pounds of spring wheat grain produced, we need to absorb more than 3 pounds of pure nitrogen; absorb 1-1.5 pounds of phosphoric acid; absorb about 3 pounds of potassium chloride. The absorption of nutrients is different during the different growth stages of spring wheat. From the emergence to the three-leaf stage, absorption of nitrogen accounted for about 15% of the total absorption during the whole growth period; absorption of phosphorus was about 10%; absorption of potassium was about 8%. From the trifoliate to the heading stage, the period of absorption of nutrients is the most. The absorption of nitrogen accounts for more than 50% of the total absorption of the whole growth period. The absorption of phosphorus and potassium account for about 70% each. If the fertilizer is lacking, the yield of spring wheat will decrease significantly. After heading, the absorption of nutrients by spring wheat decreased.
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