An Overview of Speed ​​Measurement Methods for Soil Nutrients

Soil nutrients are important factors for crop growth and development. For the determination of soil nutrients, rapid measurement methods have been popularized in recent years. Soil nutrient speed measurement is a faster and more cost-effective method than conventional analysis. The test equipment is more convenient. , And the test accuracy can meet the requirements of soil testing and fertilization soil nutrient testing technology and equipment. The soil nutrient speed meter is an instrument that plays an important role in the rapid measurement method.

The so-called rapid measurement method for the soil nutrient fastness meter simplifies the conventional analysis method for effective nutrients, such as reducing the volume of the extracting solution, shortening the extraction time, simplifying the extraction and measurement steps, and using visual colorimetry to make the operation. Quick and easy, the measurement results have a certain accuracy, easy to be grasped by the masses, because the speed measurement uses a relatively simple extraction method, so that certain nutrients can not be completely extracted, the measured nutrient quantity is generally lower than the conventional analysis. The greatest workload of soil analysis is pre-treatment. To increase the speed of measurement, simultaneous rapid extraction of multiple nutrients must be achieved. It can be said that the joint extraction technology is the basis of the rapid measurement method (Duan Tiecheng, 2002). In recent years, Mehlich-3 combined extractant, calcium chloride extractant and ASI combined extractant have been widely used in domestic research. This method is fast, can be a large number of tests, and guide the practice in a timely manner; but the measured amount is lower than the conventional method.

In the current soil nutrient testing methods, each method has its advantages and disadvantages. We must select a reasonable measurement method according to the nature of each soil, the accuracy of the test requirements, and the economic conditions, so as to better The result of the measurement guides fertilization and achieves true balanced soil fertigation. The application of soil nutrient fastness meter can completely meet the demand within a certain range, and it can not be satisfied in a very small amount. Other testing methods can also be realized.