Analysis of Concepts and Characteristics of Soil Nutrient Testing Technology

Analysis of Concepts and Characteristics of Soil Nutrient Testing Technology

In agricultural production, soil is an important factor that determines the level of crop yield and quality. Therefore, soil analysis and determination are particularly important. Soil testing is the basis for understanding soil nutrient status and conducting scientific fertilization. For a long time, the soil nutrient test mainly used routine laboratory analysis methods. The collected soil samples need to be processed in the laboratory, and then analyzed and determined by the soil nutrient tester.

This method is suitable for large-scale sample analysis that conducts large-scale nutrient investigations and recommends fertilization. In grass-roots villages lacking laboratory conditions, nutrient diagnosis of a small amount of soil samples can be accomplished using a portable, rapid measurement technique. Based on routine analysis, it is suitable for rural environment and personnel conditions. It can ensure the basic accuracy of soil testing and fertilization, and the rapid measurement technology of soil nutrients with portable, low-cost and rapid measurement is an important part of the efficient fertilization technology system. one.

1 The concept of rapid soil nutrient measurement

Soil nutrient fast measurement refers to rapid and convenient testing techniques and methods, which are relative to conventional analysis. In terms of test speed alone, automated analysis technology based on conventional analysis has the fastest test speed, and the shortest test cycle required for sample processing and laboratory analysis is a rapid test in a broad sense, representing the direction of test technology development. It has been widely used in the West with advanced technologies, sample collection, transportation, and information feedback systems. This article discusses the miniaturization and portable soil speed measurement equipment and methods that have emerged in recent years. It is suitable for testing and mobile services in the field and in the field. It is simple and convenient to use, which is what is commonly referred to as portable soil nutrient fast measurement technology.

2 Characteristics and Development of Portable Soil Nutrient Quick Measurement

Portable soil nutrient fast testing requirements in the grass-roots villages and even outdoors open field, field head, relatively poor environmental conditions, so there are high requirements in the following areas: field field measurement, equipment, reagents, drugs, high integration, easy to carry; fresh Sample measurement, the sample does not require air drying, grinding process; test speed, low cost; simple operation, easy to grasp; test accuracy to meet the basic requirements of nutritional diagnosis, recommended fertilization.

As early as the late 1970s, portable soil-based rapid surveying has begun to be applied in China. Usually, chemical reagents are used to develop color (or generate turbidity) in soil extracts, and colorimetric methods are used to determine sample content. The high, medium and low levels are basically semi-quantitative diagnosis and discrimination. Since then, with the continuous development of technology, colorimetric instruments such as photoelectric colorimeters, spectrophotometers, etc. have emerged, gradually replacing artificial eye colorimetry. Test analysis gradually moves towards quantification and precision. At present, portable soil nutrient fast measurement instruments are basically based on the principle of electro-optical colorimetry. The conventional method is appropriately simplified, and some of the finished reagents and drugs are used to achieve the purpose of improving the test speed.

Related Instruments: Soil Nutrient Tester