Soil nutrient detector is called soil fertilizer instrument for short, also known as soil tester. It is a special soil measuring instrument for rapid testing and determination of soil nutrients. Soil nutrients refer to the essential nutrients provided by the soil for crop growth, including 13 elements such as nitrogen (N), phosphorus (P), and potassium (K). The amount of soil nutrients can be measured by soil testing instruments such as soil testers and soil nutrient testers. Then, according to the indicators of soil nutrient abundance and deficiency, we can judge the amount of nutrients in this land, so as to make better use of the nutrients contained in the soil, and timely supplement the elements with insufficient content. Soil tester, soil nutrient tester can measure soil nutrients in a short time, it is an ideal soil measuring instrument.
The soil measuring instruments that can test, measure and analyze soil nutrients on the market are: soil nutrient tester, soil nutrient speed tester, soil chemical fertilizer speed tester, near infrared soil nutrient speed tester. Except that the near-infrared soil nutrient speed measuring instrument adopts near-infrared spectroscopy technology, other soil measuring instruments belong to the traditional rapid measuring method.
Connotation
In order to satisfy the requirement of being able to complete soil nutrient determination independently, at low cost and quickly under the condition of leaving the laboratory, after years of research and development, the soil fertilizer nutrient speed tester has contained the following speed measurement technology:
1. Photoelectric colorimeter manufacturing technology: colorimeters generally use filter photoelectric colorimetric technology. Due to the poor monochromaticity of the filter, the general linear error is large. The national standard allows 3-8%, YN type rapid measurement By improving the optical design and intelligent microprocessor technology, the instrument has reduced the error to 1 to 3%, reaching the accuracy level of the grating spectrophotometer, reducing weight and cost.
2. Soil sample moisture determination technology: To measure the nutrients of fresh soil, you need to know the moisture content. The newly developed capacitive moisture sensor (National Science and Technology Commission project) is added to the 2000D and 4000 speed testers to quickly determine the soil sample content. The amount of water.
3. Combined extraction technology of soil nutrients: The three available nutrients N, P and K in the soil can be leached at the same time at one time, which greatly simplifies the pretreatment work, and the leaching time is shortened from half an hour to 5 minutes.
4. Anti-interference technology of reaction system: In the routine analysis, if a certain soil has special interference, the experimenter can often add a certain treatment or choose an analysis method, but the rapid test does not have this condition, so the rapid test method and reagent formula Must have strong soil adaptability and anti-interference ability. In this regard, we have done a lot of research and optimized the reagent formulation.
5. Storage technology of finished product reagents: supplying finished product reagents to enable users to open the bottle is an important way to increase the speed of testing, and is also the direction of the development of rapid testing technology at home and abroad. Preparation technology, reagent packaging and other related technologies. The shelf life of the reagents for the rapid tester is extended to half a year to one year.
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