Henan Agricultural University's "Ninth Five-Year Plan" scientific and technological research project "Portable Soil Composition Analyzer" was recently launched. This is the first soil nutrient speed measuring instrument developed in China that contains a full set of rapid measurement technology. Compared with conventional tests, the cost of soil testing has been reduced by more than 10 times, which has solved the problem that balanced fertilization cannot be promoted because the area of ​​the field is too small. The problem. The project has developed two kinds of quick extractors for quick measurement of calcareous, neutral and acid soils, which can simultaneously complete the leaching of four nutrients including ammonium nitrogen, nitrate nitrogen, available phosphorus, and quick-acting potassium within 5 minutes. It is 6 to 24 times faster than the conventional method in which every nutrient needs to be extracted for half an hour. The project also developed a portable microcomputer-based far-infrared digester with only 1.2 kilograms, enabling the portability of digestive equipment. It can not only rapidly measure seven soil macronutrients, but also achieve rapid measurement of eight micronutrients (copper, iron, boron, manganese, zinc, silicon, sulfur, and chlorine) that cannot be quickly measured in the past. The user can apply the system to obtain fertilizer formulation recommendations without the guidance of the soil fertilizer technicians, and can also separate from the support of the laboratory and use the finished pharmaceutical agent to complete the testing independently.
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