At present, the types of soil nutrient rapid measuring instruments in China include TPY type soil nutrient speed measuring instrument and YN type soil nutrient speed measuring instrument. The measurement items include soil, fertilizer hydrolyzable nitrogen, available phosphorus, available potassium and pH. The soil nutrient rapid tester is actually an improvement of the 72-type spectrophotometer. The photoelectric colorimetric principle can be used to ensure the accuracy of the measurement. However, the volume is much smaller than the spectrophotometer, easy to carry and easy to operate. The diversity of test items makes the existing soil nutrient speed meter basically meet the needs of the grassroots.
The TPY-type soil nutrient speed measuring instrument developed by Zhejiang Top is easy and fast to operate, and can be measured at the service points of grassroots, village, mobile test service vehicles. The soil nutrient speed meter can directly test fresh soil, does not require air drying, can achieve joint extraction of major test items, and can provide finished product dosage. In the routine analysis process, if the user encounters a special situation, it is often necessary for the user to add some treatment to the soil sample or select other analysis methods, and the user who uses the soil nutrient speed meter does not need to solve such problems.
The soil nutrient rapid tester is a soil nutrient test equipment with faster test speed, lower cost, easier test equipment and better test accuracy to meet the requirements of soil testing and formula fertilization. However, the relationship between the rapid determination and the conventional method using the soil nutrient rapid tester and the precision and stability of the rapid test method have not been reported.
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