When is wheat planting suitable for fertilization? Fertilization is an important criterion for effectively increasing crop yields. However, fertilization also has some precautions. It is important to grasp the two key periods of fertilization, which plays an important role in the multiplication of crop crops. The so-called two key periods refer to the critical period of nutrition and the maximum efficiency period of nutrition. We will introduce in detail below.
The so-called critical period of nutrition refers to the fact that wheat has a small amount of fertilizer nutrient requirements, but the degree of need is very urgent. At this time, if this nutrient is lacking, the growth and development of the crop will be significantly affected, and the damage caused by it will be difficult to recover or make up even if the nutrient is applied later.
The critical period of phosphorus nutrition is in the wheat seedling stage. Because the root system is still weak and the absorption capacity is poor, the phosphorus requirement in the seedling stage is very urgent. The critical period of nitrogen nutrition is when vegetative growth turns to reproductive growth, and winter wheat is in the two stages of tillering and young panicle differentiation. The application of nitrogen fertilizer in the late growth stage can only increase the nitrogen content in the stems and leaves, which has no obvious effect on increasing the number of grains per ear or increasing the yield.
The maximum efficiency period of nutrition refers to the period in which the maximum amount of nutrients absorbed by wheat is the highest, the absorption rate is the fastest, and the efficiency of fertilization is also the highest. The maximum efficiency of winter wheat nutrition is from jointing to heading. At this time, the growth is strong and the ability to absorb nutrients is strong. It is necessary to timely topdress to meet the maximum demand for nutrients in wheat and to obtain the best fertilization effect.
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