What are the precautions for formula fertilization?
Many farmers do not understand the scientific connotation of formula fertilization, blindly believe that as long as the formula is obtained, the fertilizer that needs to be replenished can be applied to the ground at one time as required. Soil fertilization is convenient for labor saving, and farmers are easy to accept. Many manufacturers sell a large number of products, and to seize this characteristic, the banner of serving farmers is also to guide farmers to apply fertilizer. A slightly better formula fertilization instruction unit requires several times of soil topdressing in addition to the application of base fertilizer. Basically, it only guides farmers to carry out soil fertilization, completely ignoring other application methods and application effects. Soil fertilization has the disadvantages of large application rate and environmental pollution. In addition, in some cases, only soil fertility can not meet the growth and development needs of crops, and the effect of fertilization is not achieved. Many formula fertilization instruction units give farmers a fertilization formula that is only the amount of fertilizer elements in the soil, and the amount that should be replenished, so that farmers can supplement it. Most manufacturers ignore other characteristics of the soil. Whether nutrients can be absorbed and utilized by crops is not a simple quantitative supplement problem, but also subject to various factors in the soil. For example, in alkaline soils, although a large amount of trace element fertilizers such as calcium and iron are added according to the formula, the crop is still deficient in calcium and iron. Fertilization methods for sandy soils and viscous soils are absolutely different. In this case, simple soil fertilization can not solve the problem of crop deficiency. Many formula fertilization measures do not take into account weather factors. On cloudy days, despite the large amount of fertilizer applied to the soil, crops still lack fertilizers such as potassium, calcium and magnesium. In the winter cultivation of greenhouse vegetables, although the base fertilizer and topdressing are applied to the soil according to the measured values, the soil does not lack a large amount of elements, medium elements, and trace elements, but the vegetables still exhibit nitrogen deficiency and potassium deficiency. Symptoms such as calcium, growth and development are not normal, and the yield is not high. Regardless of the differences in weather, soil quality, soil pH and other factors, the soil base application and topdressing of fertilizers can not fully reflect the superiority of formula fertilization, and often cause losses to production. Different crops have different fertilizer absorption rules in different growth stages. For example, melon crops require more nitrogen fertilizer in the seedling stage, and more potassium fertilizer is needed in the middle growth stage. A small amount of nitrogen fertilizer is needed in the seedling stage of the bean crops. A large amount of phosphorus and potassium fertilizer is needed. This fertilizer requirement should not only reflect the amount in the formula fertilization, but also reflect the time difference. This has been overlooked in many formula fertilization guidelines when formulating fertilizers. This article URL: What are the precautions for formula fertilization? SMART Digital Bluetooth Hearing Aids SMART Digital Bluetooth Hearing Aids Shenzhen Sunshine Technology Co.,Ltd , https://www.szyatwin.com