Method for estimating soil organic carbon content by using mid-infrared spectrum technology

Abstract

The invention discloses a method for estimating soil organic carbon content by using a mid-infrared spectrum technology, which comprises the following steps: 1) collecting several soil samples, measuring the organic carbon content of the soil sample; 2) collecting the mid-infrared spectrum data of the soil sample, dividing the mid-infrared spectrum data into a modeling sample set TN and an examination sample set PM; 3) taking the mid-infrared spectrum data of each soil sample in the modeling sample set TN, taking the organic carbon content of the soil sample as output to establish a model, and using the examination sample set PM for examining the model; and 4) collecting the mid-infrared spectrum of the soil to be estimated, putting the result in the model obtained in the step 3), and calculating the organic carbon content of the soil to be estimated. The method provided by the invention has high analysis efficiency and precision, and provides a feasible method for acquisition of large-area digital agriculture information and precious work.

Description

technical field [0001] The invention relates to the fields of optical technology and resource environment technology, in particular to a method for estimating soil organic carbon content using mid-infrared spectroscopy. Background technique [0002] As the basis of sustainable agriculture, precision agriculture is the main trend of agricultural development today. As the basis of agricultural production, soil is a complex spatial variation. Therefore, obtaining real-time information on farmland soil properties and its spatial distribution is of great significance to guide the implementation of farmland precision management and farmland soil fertility evaluation. [0003] At present, the conventional chemical analysis methods for the determination of soil organic matter and organic carbon are usually long-term, high-cost, and difficult to measure directly in the field, which cannot meet the needs of rapid and effective monitoring of the spatial distribution and mapping of vari...

AI Technical Summary

Problems solved by technology

And for soil carbon (McCarty G W, Reeves J B III, Reeves V B, et al.Mid-infrared and near-infrared diffuse reflectance spectroscopy for soil carbon measurement.Soil Sci.Soc.Am.J.,2002,66:640-646 ), the mid-infrared is superior to the near-infrared because more spectral information of soil carbon appears in the mid-infrared band, and domestic research on the prediction of soil organic matter or organic carbon based on mid-infrared technology has not yet been reported.

Images