According to practice, chemical fertilizers are applied to the soil for crop absorption, and the utilization rate is generally not high. For example, the utilization rate of nitrogen fertilizer for rice is about 50%, and the utilization rate of phosphate fertilizer is 20% to 30%. If deep fertilization is used, the utilization of fertilizer can be greatly improved and the loss of fertilizer can be reduced.
Deep fertilization is characterized by applying fertilizer to the depths of the tillage layer and slowly being absorbed by the crop. There are four ways to apply deep fertilizer: 1. Plowing the field deep. This is a way of deep application of base fertilizer. The practice is to drain the field water to the near dry before ploughing the field, then spread the fertilizer evenly on the surface of the field, then plow and level it, then insert it. 2. Deep application of the surface layer. This is another way of deep application of base fertilizer. The practice is to spread the fertilizer on the field after the last plowing of the transplanting, and then transplant the rice in the field. 3. Deep application of the ball. This is a way of topdressing. The practice is to make fertilizer and fat mud and water into a ball fertilizer in a certain proportion, each weighing about 100 grams. Topdressing is to insert a ball of fertilizer into the middle of every 4 seedlings, with a depth of 7 cm to 10 cm. 4. Deep application of liquid. This is another way to topdress. The method is to mix fertilizer or farmyard manure water into fertilizer solution, and then apply it to the soil with a fertilizer applicator, which is about 10 cm deep. There are mainly the above methods for deep fertilization of rice. Among them, deep application of ball fertilizer is the best, and deep fertilization is better for topdressing.
There are many benefits to deep application of fertilizer: 1. The lower layer of soil colloid can be used to adsorb ammonium ions to avoid loss of volatilization; After the application to the lower layer, the denitrification of ammonium nitrogen is avoided and the nitrogen loss is lost; Avoid the loss of surface runoff; 4. Avoid the absorption of plants such as soil weeds; 5. Avoiding the pre-crop life of crops, and the lack of nutrient abnormalities occurred in the later period; The deep application of the superphosphate made of the superphosphate reduces the contact area of ​​the soil and reduces the effect of the phosphorus being fixed by the soil, thereby improving the fertilizer efficiency.
Deep fertilization is characterized by applying fertilizer to the depths of the tillage layer and slowly being absorbed by the crop. There are four ways to apply deep fertilizer: 1. Plowing the field deep. This is a way of deep application of base fertilizer. The practice is to drain the field water to the near dry before ploughing the field, then spread the fertilizer evenly on the surface of the field, then plow and level it, then insert it. 2. Deep application of the surface layer. This is another way of deep application of base fertilizer. The practice is to spread the fertilizer on the field after the last plowing of the transplanting, and then transplant the rice in the field. 3. Deep application of the ball. This is a way of topdressing. The practice is to make fertilizer and fat mud and water into a ball fertilizer in a certain proportion, each weighing about 100 grams. Topdressing is to insert a ball of fertilizer into the middle of every 4 seedlings, with a depth of 7 cm to 10 cm. 4. Deep application of liquid. This is another way to topdress. The method is to mix fertilizer or farmyard manure water into fertilizer solution, and then apply it to the soil with a fertilizer applicator, which is about 10 cm deep. There are mainly the above methods for deep fertilization of rice. Among them, deep application of ball fertilizer is the best, and deep fertilization is better for topdressing.
There are many benefits to deep application of fertilizer: 1. The lower layer of soil colloid can be used to adsorb ammonium ions to avoid loss of volatilization; After the application to the lower layer, the denitrification of ammonium nitrogen is avoided and the nitrogen loss is lost; Avoid the loss of surface runoff; 4. Avoid the absorption of plants such as soil weeds; 5. Avoiding the pre-crop life of crops, and the lack of nutrient abnormalities occurred in the later period; The deep application of the superphosphate made of the superphosphate reduces the contact area of ​​the soil and reduces the effect of the phosphorus being fixed by the soil, thereby improving the fertilizer efficiency.
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