Recently, many farmers have asked: Is it reasonable to apply calcium, magnesium and phosphate fertilizers in orchard and tea garden acid soil? Can I apply superphosphate? The author's answer is that the application of calcium magnesium phosphate in acid soil is correct; acidic soil is best not to apply superphosphate. Calcium magnesium phosphate fertilizer and superphosphate are two commonly used phosphate fertilizers. Most farmers are accustomed to using superphosphate (also known as calcium), while calcium magnesium phosphate is not used much, especially in acidic orchards and tea gardens such as red and yellow soil. The application of calcium magnesium phosphate is better. Calcium magnesium phosphate is an alkaline phosphate fertilizer, and it is also a multi-element fertilizer, in addition to containing 14% to 20% of phosphorus pentoxide, also contains 25% to 30% calcium oxide, about 30% of silica, 15 Magnesium oxide of % to 18% is best applied in slightly acidic or acidic soils. It is applied in calcareous soil, and it is poor in fertilizer because it is difficult to dissolve. One of the advantages of applying calcium, magnesium and phosphorus fertilizers to acidic soils is that it neutralizes soil acidity. Calcium, magnesium and phosphorus fertilizers contain 14% to 20% of phosphorus. They are alkaline slow-acting fertilizers. They are insoluble in water, non-toxic, non-corrosive, non-hygroscopic and non-caking. It is widely used in a variety of crops and acidic soils that are deficient in phosphorus. Soil acidification in the southern region is more serious, the pH value is generally 4.5 to 5, and a considerable part of the garden has a pH of only 3:00. In order to promote the growth of orchard and tea plantation crops, the application of physiological acid fertilizer must be controlled during fertilization to prevent the soil from being more acidified. At the same time, we must pay attention to improving the acidity of the soil. The acid-saturated soil is not good for the yield and quality of the fruit and tea. Calcium magnesium phosphate is a fertilizer that is alkaline in nature. Therefore, it is possible to neutralize the acidity of the garden soil. Second, the application of calcium magnesium phosphate fertilizer in acid soil is good. Practice has proved that in acidic soil, the effect of calcium magnesium phosphate fertilizer is better than that of superphosphate, the fertilizer effect of superphosphate is 100, and the fertilizer effect of calcium magnesium phosphate is 108.6. The soil of the southern tea garden is mostly acidic and strong acid soil, so the effect of applying calcium magnesium phosphate is good. Third, it is conducive to increasing production and improving quality. Calcium, magnesium and phosphate fertilizers are applied in acid orchards and acid tea gardens. These phosphate fertilizers contain various nutrients such as phosphorus, magnesium, calcium and silicon, which promote the fruit ripening, promote fruit coloration, and improve resistance and storage. The role. Applying calcium magnesium phosphate fertilizer in tea garden can significantly increase the content of tea polyphenols and water extracts in tea, which is beneficial to increase the aroma of tea, while calcium and magnesium can significantly increase catechins, theanine and vitamins in tea. A, the content of vitamin C. Especially in acidic red soil and yellow loam, the application of calcium magnesium phosphate fertilizer is more effective in improving yield and improving quality. Calcium, magnesium and phosphorus fertilizers applied in tea gardens and orchards are suitable for base fertilizer application. If topdressing should be applied early in the seedling stage and calcium, magnesium and phosphorus fertilizers are used as alkaline fertilizers, it should not be mixed with ammonium bicarbonate or ammonium chloride. Otherwise, it will cause loss of ammonia volatilization. Calcium magnesium phosphate does not contain free acid, so it can be used not only as a base fertilizer, but also as a base fertilizer or top dressing. When the organic fertilizer is mixed with the organic fertilizer or applied after being piled up with the organic fertilizer, the action of the microorganism can promote the dissolution of the calcium magnesium phosphate fertilizer, thereby improving the fertilizer efficiency. When applying in the tea garden and orchard as the base fertilizer, it should be applied 2 to 3 months before planting or sowing, ditching or digging hole application, the ditch depth is 50-60 cm, the bottom of the ditch is loosened 10-15 cm, and the layer is fertilized. After each layer of soil and fertilizer is mixed, apply the second layer, and then backfill the mature soil. Generally, the application amount per mu is about 50 kg. The base fertilizer is generally applied after harvesting in the orchard or after the tea garden is stopped, and combined with winter tillage, it should be sooner rather than later, generally 30 to 35 kg per mu. For the application of topdressing, a small part of the annual amount can be applied during the spring spring tea germination and when the fruit tree begins to grow. Generally, the method of ditch application is adopted, and the soil is covered in time after application. Calcium, magnesium and phosphate fertilizers should be applied in winter or in low temperature areas. Due to its slow and long-lasting fertilizer effect and long-lasting effect, it can be applied in different seasons (years) to improve the utilization rate of fertilizer. Disclaimer: Some articles on this website are transferred from the Internet. 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