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Key Techniques for Soil Testing and Formula Fertilization
The key technical aspects of soil testing and formula fertilization are based on soil test results, field tests, laws of crop fertilizer requirements, agricultural production requirements, etc. Based on the rational application of organic fertilizer, nitrogen, phosphorus, potassium, and intermediate elements are proposed. The amount and proportion of trace elements and other fertilizers, and at the appropriate time, using the appropriate methods of application of scientific fertilization methods. Soil testing and formula fertilization include 9 key technical links. 1. The field experiment field experiment is the fundamental way to obtain the best amount of fertilizer, fertilization period and fertilization method for various crops. It is also the basic link for screening and verifying the soil nutrient testing technology and establishing the fertilization index system. Through field trials, the optimal fertilization amount, base, top dressing distribution ratio, fertilization period, and fertilization method for each fertilizer unit in different crops were grasped; basic parameters such as soil nutrient correction coefficient, soil nutrient supply amount, crop manure requirement, and fertilizer utilization ratio were constructed; Crop fertilization model provides basis for fertilization partition and fertilizer formulation. 2. Soil testing Soil nitrogen, phosphorus, potassium, and trace element nutrients were measured to understand soil fertility. 3. Recipe design Divide fertilization zoning in different regions by summarizing field tests and soil nutrient data. At the same time, according to the similarities and differences of climate, landforms, soils, and farming systems, combined with expert experience, formulate fertilization formulas for different crops. 4. In each fertilization subdivision unit, the calibration experiment includes 3 treatments of formula fertilization, customary fertilization for farmers, and blank fertilization. The main crops and their main cultivars are used as research objects to compare the effect of formula fertilization on the yield and to verify fertilization parameters. Verify and improve fertilizer formulations and improve technical parameters for soil testing and formula fertilization. 5, formula processing There are different modes in different regions, but the most important mode of operation is market operation, factory processing, network management. 6. Demonstration and promotion Establish a demonstration area of ​​soil testing and formula fertilization, create a window for farmers, establish a model, and fully demonstrate the technical effects of soil testing and formula fertilization. 7. Propaganda and training Farmers are the end users of soil testing and fertilization techniques. It is imperative to teach the farmers methods and modes of scientific fertilization. At the same time, systematic training for technicians at various levels, fertilizer production companies, and fertilizer distributors must be systematically strengthened to gradually establish technical personnel. Fertilizer business holders of certificates. 8. Effect evaluation The actual effect of soil testing and formula fertilization was verified. Farmers' feedback information was timely obtained and the management system, technical system and service system were continuously improved. At the same time, in order to scientifically evaluate the actual effect of soil testing and formula fertilization, a certain area must be dynamically investigated. 9. Technology R&D The R&D is a scientific and technological support to ensure the long-term effectiveness of soil testing and fertilizer application. Focus on field research methods, soil nutrient testing techniques, fertilizer preparation methods, data processing methods, and other aspects of research and development work, and constantly improve the level of soil testing and fertilizer application technology. Excerpted from China Agricultural Press>