How to properly apply superphosphate?
The water-soluble monocalcium phosphate in the superphosphate is easily fixed in the soil, and the mobility is small, that is, the movement is slow, and the moving distance is short. Therefore, the principle of rationally applying the superphosphate is to reduce the contact area with the soil. Also try to increase its chances of contact with the roots. According to its nature and the above application principles, the rational application method is as follows:
(1) Centralized application and layered application of calcium phosphate can be used as base fertilizer, seed fertilizer and fertilizer, but no matter what fertilizer is used, it is effective in concentrated application. Because concentrated application (strip application, acupoint application) can reduce the contact surface between fertilizer and soil, reduce fixation, and increase the chance of contact with the root group. The concentration of fertilization point is large, which is conducive to the diffusion of phosphate to the root surface, making the root system easy. Absorb phosphorus nutrition. It is better to adopt a layered application on the basis of concentrated application. That is, most of the phosphate fertilizer is used as a base fertilizer, and a small amount of shallow application or seed fertilizer, or rice roots. This can adapt to the growth of crop roots and the need for fertilizers, that is, the roots are shallow and the roots are shallow and the roots are long and deep. When planting fertilizer or root fertilizer, it should be noted that the free acid in the superphosphate is harmful to the seeds and roots. Generally, 2 to 3% of the plant ash equivalent to the amount of phosphate fertilizer can be mixed with the seeds for half a day before being mixed with the seeds, such as root fertilizer. Phosphate fertilizer should be mixed with 1~2 times of decomposed organic fertilizer or fine soil for half a day to one day, and then adjusted with water to form a paste.
(2) Mixing with organic fertilizer and applying organic fertilizer can reduce the fixation of phosphorus. On the one hand, it reduces contact with soil, and on the other hand, the decomposition product of organic fertilizer can reduce the fixation of phosphorus in iron and aluminum in soil.
(3) Preparation of granular fertilizer It is effective to apply superphosphate to prepare particles having a particle size of 3 to 5 mm on a soil having strong immobilization. Because it gradually dissolves the available phosphorus, it takes a long time to be effective; at the same time it reduces contact with the soil. Granular fertilizer is suitable for mechanical application, and it is safe to use as a seed fertilizer. However, the particle size should not be too large, and too large a particle will reduce the contact of the phosphate fertilizer with the root system. Applied on calcareous soil, it is not necessary to make granules. According to the test, the application of powdered and granular superphosphate does not make much difference.
(4) Apply on acid soil, apply lime. Apply lime to the puddle and then apply phosphate fertilizer. Do not mix lime with common calcium to avoid reducing the effectiveness of phosphate fertilizer.
(5) For root dressing, it is also a cost-effective method to apply superphosphate to the root spray. It can prevent phosphorus from being fixed in the soil and directly absorbed by the crop. According to the test materials, citrus leaching of 3% superphosphate can not only increase the yield after physiological fruit drop, but also increase the total sugar content; rice, corn, wheat and other cereal crops sprayed calcium phosphate solution in the middle and late stages, can increase Seeds of thousands of grains. Before spraying, soak the superphosphate with 10 times water for overnight, and dilute the supernatant with water to the desired concentration and spray. Spraying different concentrations of various crops, rice, wheat and other cereal crops can be used 1 ~ 3% leachate, fruit trees can be used about 2% concentration, cotton, vegetables (such as tomatoes) can be used 1% concentration.
The application amount of superphosphate is mainly determined according to the required nature of the phosphorus and the planned yield of the crop, and the content of available phosphorus in the soil. Generally, the amount of base fertilizer per acre is 20-30 kg, and the sugarcane is applied to 40 kg per mu. For topdressing, generally 10 to 20 kilograms per mu, and 4 to 5 kilograms per mu.
Superphosphate is particularly suitable for use in sulphur-deficient soils, even in soils that are not sulphur-depleted, for crops that are particularly sulfur-demanding, such as cereals, legumes, peanuts, and pastures.
Reprinted: China Agriculture Network
The water-soluble monocalcium phosphate in the superphosphate is easily fixed in the soil, and the mobility is small, that is, the movement is slow, and the moving distance is short. Therefore, the principle of rationally applying the superphosphate is to reduce the contact area with the soil. Also try to increase its chances of contact with the roots. According to its nature and the above application principles, the rational application method is as follows:
(1) Centralized application and layered application of calcium phosphate can be used as base fertilizer, seed fertilizer and fertilizer, but no matter what fertilizer is used, it is effective in concentrated application. Because concentrated application (strip application, acupoint application) can reduce the contact surface between fertilizer and soil, reduce fixation, and increase the chance of contact with the root group. The concentration of fertilization point is large, which is conducive to the diffusion of phosphate to the root surface, making the root system easy. Absorb phosphorus nutrition. It is better to adopt a layered application on the basis of concentrated application. That is, most of the phosphate fertilizer is used as a base fertilizer, and a small amount of shallow application or seed fertilizer, or rice roots. This can adapt to the growth of crop roots and the need for fertilizers, that is, the roots are shallow and the roots are shallow and the roots are long and deep. When planting fertilizer or root fertilizer, it should be noted that the free acid in the superphosphate is harmful to the seeds and roots. Generally, 2 to 3% of the plant ash equivalent to the amount of phosphate fertilizer can be mixed with the seeds for half a day before being mixed with the seeds, such as root fertilizer. Phosphate fertilizer should be mixed with 1~2 times of decomposed organic fertilizer or fine soil for half a day to one day, and then adjusted with water to form a paste.
(2) Mixing with organic fertilizer and applying organic fertilizer can reduce the fixation of phosphorus. On the one hand, it reduces contact with soil, and on the other hand, the decomposition product of organic fertilizer can reduce the fixation of phosphorus in iron and aluminum in soil.
(3) Preparation of granular fertilizer It is effective to apply superphosphate to prepare particles having a particle size of 3 to 5 mm on a soil having strong immobilization. Because it gradually dissolves the available phosphorus, it takes a long time to be effective; at the same time it reduces contact with the soil. Granular fertilizer is suitable for mechanical application, and it is safe to use as a seed fertilizer. However, the particle size should not be too large, and too large a particle will reduce the contact of the phosphate fertilizer with the root system. Applied on calcareous soil, it is not necessary to make granules. According to the test, the application of powdered and granular superphosphate does not make much difference.
(4) Apply on acid soil, apply lime. Apply lime to the puddle and then apply phosphate fertilizer. Do not mix lime with common calcium to avoid reducing the effectiveness of phosphate fertilizer.
(5) For root dressing, it is also a cost-effective method to apply superphosphate to the root spray. It can prevent phosphorus from being fixed in the soil and directly absorbed by the crop. According to the test materials, citrus leaching of 3% superphosphate can not only increase the yield after physiological fruit drop, but also increase the total sugar content; rice, corn, wheat and other cereal crops sprayed calcium phosphate solution in the middle and late stages, can increase Seeds of thousands of grains. Before spraying, soak the superphosphate with 10 times water for overnight, and dilute the supernatant with water to the desired concentration and spray. Spraying different concentrations of various crops, rice, wheat and other cereal crops can be used 1 ~ 3% leachate, fruit trees can be used about 2% concentration, cotton, vegetables (such as tomatoes) can be used 1% concentration.
The application amount of superphosphate is mainly determined according to the required nature of the phosphorus and the planned yield of the crop, and the content of available phosphorus in the soil. Generally, the amount of base fertilizer per acre is 20-30 kg, and the sugarcane is applied to 40 kg per mu. For topdressing, generally 10 to 20 kilograms per mu, and 4 to 5 kilograms per mu.
Superphosphate is particularly suitable for use in sulphur-deficient soils, even in soils that are not sulphur-depleted, for crops that are particularly sulfur-demanding, such as cereals, legumes, peanuts, and pastures.
Reprinted: China Agriculture Network
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Stick Cage Screw Type Roller Frame
Stick Cage Screw Type Roller Frame,5 Wires Cage Roller Frame,Two End Cap Roller Frame,7 End-Cap Type Roller Frame
PRO-CHARGER CO., LTD. (VICTOR HERO HOLDINGS LTD, TIME VALUE LTD.) , https://www.pro-chargerco.com