Using NIRS To Predict The Content Of Available Nitrogen, Phosphorus And Potassium In Soil

The content of soil nutrients, especially available nitrogen, phosphorus and potassium is one of the important bases to instruct scientific fertilization. It is necessary to study the rapid soil nutrient measuring methods and apparatus for the development of precise agriculture. Conventional chemistry method for measuring soil nutrients has several shortcomings such as low speed, low efficiency and high cost. In order to solve these problems, many domestic and foreign researchers take an active part in the research of soil nutrient fast measure technique. Near-infrared reflectance spectroscopy (NIRS) is valued by people because its speediness, low cost and measuring many components simultaneously.Near-infrared spectroscopy analysis is a new technique. This method makes use of optics characteristic of organic matter in its near-infrared spectrum area to fast estimate one or several chemical compositions content of the sample. In the process of analysis, the sample does not need to be pretreated, does not been consumed and destructed. The instrument does not pollute the environment too. It becomes the representative of green analysis technique. At the same time it is also a kind of "instantaneous analysis technique", enjoys the laudatory name of "the giant analysis method". Since 1980's, NIRS analysis technique in overseas has been used in the fertilizer and plant nutritional science, but in China the researches of NIRS in these domains rarely be seen. In this article, we use near-infrared reflectance...