Soil is the basis of agricultural production, and scientific and rational fertilization, irrigation and cultivation measures need to be determined according to the condition of the soil. Only by promoting the application of modern testing techniques, quickly and timely understanding the various information of the soil, and mastering the dynamic changes of soil physical and chemical properties, can we better implement the farmland input regulation and field management measures, and maintain the material and energy of the soil ecological environment. Cycle to achieve a balance between input and output of cultivated land. The rapid testing of soil nutrients improves the speed of testing and enhances the ability of mobile services by simplifying operational procedures, applying portable instrumentation, and finished reagents. The soil nutrient speed measuring instrument has been updated and replaced by advanced technology such as microcomputer electronic circuit. Some instrument products have gradually realized the characteristics of compact structure, small size, light weight and convenient carrying. The operation is relatively simple, the test function and accuracy are basically satisfied. Soil fertilization requirements. Applying soil nutrient rapid measurement technology to rationally regulate farmland input, on the one hand, it can avoid the decline of cultivated land fertility due to over-utilization, on the other hand, it can avoid waste caused by excessive input of farmland, reduce costs, improve efficiency, reduce environmental pollution, and achieve Sustainable development of agriculture. I. Application Status Soil nutrient rapid measurement technology has been promoted and applied in some areas of China. In 1999, the National Agricultural Technology Extension Service Center carried out the evaluation and screening of some soil nutrient rapid measurement instruments. The laboratory performance of the main instrument products was evaluated. The advantages and disadvantages of various instruments were preliminarily grasped. Better, more suitable for the instrument type of soil nutrient rapid measurement. Through the promotion and application in some areas, good results have been achieved. Second, the promotion of factors soil nutrient rapid measurement technology requires supporting equipment and reagents and other hardware and analytical techniques, indicators and other software support, its promotion and application needs to rely on soil and fertilizer laboratory, soil rapid measurement technology and conventional methods, testing Based on the research on the correlation between indicators and crop absorption, equipped with relevant equipment and technical index system, the soil nutrient rapid measurement work is carried out under the guidance of professional technicians. The soil nutrient rapid measurement technology is suitable for all aspects of nutrition diagnosis and fertilization, nutrient survey, soil fertility monitoring, and cultivated land quality evaluation of various crops. III. Key technologies Key technologies for soil nutrient rapid measurement include: scientifically taking soil representative samples and processing soil samples, rationally selecting soil nutrient extractants and analytical methods, and analyzing various soil nutrients, using various qualities. The control method is used to control the quality of the analysis, as well as the supporting indicators for the lack of nutrient and the recommended fertilization index system, as well as the supporting instruments and reagents.
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