First, due to local fertilization, the phosphorus fertilizer should be distributed to the soil with low organic matter content and phosphorus deficiency to fully exert the fertilizer shovel. Phosphate fertilizer is preferentially applied to thin and thin fields, dry land, new depressions and raw land, as these fields are usually less abundant in phosphorus.
II. Nitrogen, Phosphorus and Potassium According to the test on wheat, the combined application of NPK was 16.5% higher than that of single application of phosphorus, 10.5% higher than that of single application of nitrogen, and 6.4% higher than that of nitrogen and phosphorus.
3. Mixed application of phosphate fertilizer and organic fertilizer can reduce the adsorption and fixation of phosphorus in the soil, promote the release of insoluble phosphorus, and help to improve the efficiency of phosphate fertilizer.
4. The demand for phosphorus and the ability to absorb and utilize different crops with different nitrogen and phosphorus. Practice has proved that legume crops, rapeseed, cotton, melons and fruit trees are all hi-phosphorus crops, and the application of phosphate fertilizer has better fertilizer efficiency.
5. The critical period for the timely application of crop phosphorus nutrition is generally in the early stage of fertility, and this period of application can exert maximum efficiency. Therefore, phosphate fertilizer should be used as base fertilizer, seed fertilizer, fertilization in the field and seedbed, roots and early topdressing.
6. The concentrated application of phosphate fertilizer is easy to be fixed by the soil. The utilization rate in the season is only 10-25%, especially on various clay soils. If the phosphate fertilizer is applied, the fertilizer effect cannot be fully exerted. The concentrated fertilization method, such as ditch application, hole application, seed dressing and alfalfa root, can be applied to the root layer dense soil layer, which can reduce the contact surface of phosphate fertilizer and soil, reduce the soil phosphorus fixation and improve the utilization rate.
7. The application of super-calcium phosphate leaching solution for foliar spraying can make the leaves absorb nutrients instead of roots, synthesize organic matter, reduce the process of absorption and operation, and have the characteristics of less fertilizer, quick fertilizer efficiency and high utilization rate. The spraying time is better when spraying each time in the booting and filling stages. The amount of phosphorus sprayed outside the root can be 2-3 kg per mu, and the spraying concentration is preferably 3-6%.
Eight, with the application of micro-fertilizer in the rational application of phosphorus, on the wheat, each mu of zinc with 1 kg of zinc fertilizer, 0.5 kg of boron fertilizer, the effect of better yield.
9. Although the utilization rate of economically applied phosphate fertilizer is low in the current season, its aftereffect is very long. The cumulative utilization rate of residual effect is 38.9% within 20 years. Therefore, when the phosphate fertilizer is applied more once, it is not necessary to apply it every year, but it should be noted every time. Do not use too much to avoid waste.
II. Nitrogen, Phosphorus and Potassium According to the test on wheat, the combined application of NPK was 16.5% higher than that of single application of phosphorus, 10.5% higher than that of single application of nitrogen, and 6.4% higher than that of nitrogen and phosphorus.
3. Mixed application of phosphate fertilizer and organic fertilizer can reduce the adsorption and fixation of phosphorus in the soil, promote the release of insoluble phosphorus, and help to improve the efficiency of phosphate fertilizer.
4. The demand for phosphorus and the ability to absorb and utilize different crops with different nitrogen and phosphorus. Practice has proved that legume crops, rapeseed, cotton, melons and fruit trees are all hi-phosphorus crops, and the application of phosphate fertilizer has better fertilizer efficiency.
5. The critical period for the timely application of crop phosphorus nutrition is generally in the early stage of fertility, and this period of application can exert maximum efficiency. Therefore, phosphate fertilizer should be used as base fertilizer, seed fertilizer, fertilization in the field and seedbed, roots and early topdressing.
6. The concentrated application of phosphate fertilizer is easy to be fixed by the soil. The utilization rate in the season is only 10-25%, especially on various clay soils. If the phosphate fertilizer is applied, the fertilizer effect cannot be fully exerted. The concentrated fertilization method, such as ditch application, hole application, seed dressing and alfalfa root, can be applied to the root layer dense soil layer, which can reduce the contact surface of phosphate fertilizer and soil, reduce the soil phosphorus fixation and improve the utilization rate.
7. The application of super-calcium phosphate leaching solution for foliar spraying can make the leaves absorb nutrients instead of roots, synthesize organic matter, reduce the process of absorption and operation, and have the characteristics of less fertilizer, quick fertilizer efficiency and high utilization rate. The spraying time is better when spraying each time in the booting and filling stages. The amount of phosphorus sprayed outside the root can be 2-3 kg per mu, and the spraying concentration is preferably 3-6%.
Eight, with the application of micro-fertilizer in the rational application of phosphorus, on the wheat, each mu of zinc with 1 kg of zinc fertilizer, 0.5 kg of boron fertilizer, the effect of better yield.
9. Although the utilization rate of economically applied phosphate fertilizer is low in the current season, its aftereffect is very long. The cumulative utilization rate of residual effect is 38.9% within 20 years. Therefore, when the phosphate fertilizer is applied more once, it is not necessary to apply it every year, but it should be noted every time. Do not use too much to avoid waste.
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