The deep application of chemical fertilizers is based on the law of crop fertilizer requirements and the nature of the soil, using formula fertilization technology and the principle of fertilizer rhizosphere effect, applying chemical fertilizers to a certain depth in the arable layer, so as to facilitate better absorption of crops, reduce chemical fertilizer volatile losses, and improve fertilizer utilization A method of fertilization for the purpose.

The effect of applying chemical fertilizer mechanization deep application technology is more ideal. The mechanized deep application of chemical fertilizers is to complete the deep application of chemical fertilizers in the process of mechanized arable land, land preparation, sowing, and mid-cultivation, etc., and use mechanical methods to control the technical indicators such as the depth, position, and quantity of fertilization. The deep application of chemical fertilizers is distributed in the effective rhizosphere of crops, which is conducive to better absorption of crops and reduces the volatilization losses caused by surface or shallow application of chemical fertilizers.

The average utilization rate of nitrogen fertilizers can be increased from 30% to 40%. Deep application of phosphorus and potassium fertilizers can reduce the loss of wind erosion, promote absorption, and prolong the fertilizer efficiency. The increase rate can generally reach 5%-15%. Mechanized deep application can also avoid seed burning, improve efficacy and reduce pollution. There are three types of deep fertilizer application:

Deep fertilizer application

There are two methods of deep application of base fertilizer: one is to spread fertilizer first and then ploughing; the other is to apply fertilizer to the furrow while ploughing and turning, the second method is better. The fertilization depth is 6 cm, the width of the fertilizer belt is 3-5 cm, the fertilizer discharge is uniform and continuous, and there is no obvious broken strip.

Fertilizer application

The deep application of seed fertilizer requires a certain thickness between the seed and the fertilizer, generally more than 3 cm, to meet the nutrient requirements for the growth of the crop at the seedling stage, and to avoid the risk of seed burning and seedling burning.

Top dressing

Top dressing and deep application is to open a ditch or dig holes between 10 and 20 cm from both sides of the plant row. The depth should be 6 to 10 cm and the width of the fertilizer should be more than 3 cm. Pay attention to covering the soil after fertilization.