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A Novel Measurement Method of the Emission Rules of Greenhouse Gases from Fertilized Soil Based on Fourier Transform Infrared Spectrometry with Long Optical Path |
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| Authors: | Guangdong Xiao Tongqing Liao Ling Zheng |
| Affiliation: | 1. National Research Center of Intelligent Equipment for Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China;2. School of Electronic information Engineering, Anhui University, Hefei, China;3. School of Electronic information Engineering, Anhui University, Hefei, China |
| Abstract: | Farm soil is the main source of greenhouse gas emission. We developed an optical system for measuring nitrous oxide and carbon dioxide from soil using infrared spectrometer and long optical path gas cell based on multi-reflecting mirrors. The spectral characteristics of nitrous oxide at 2198–2223 cm?1 and of carbon dioxide at 2258–2283 cm?1 were observed with the system. We studied the rules of greenhouse gas emission and found that nitrous oxide increased with soil moisture whereas carbon dioxide showed no obvious relationship with moisture. We also studied the diurnal variation rules of nitrous oxide and carbon dioxide from fertilized soil. These results are consistent to the previous results obtained with other analytical methods. The results indicate that the infrared spectroscopy with long optical path is an effective way to measure greenhouse gas emission from soil. |
| Keywords: | FTIR greenhouse gases optical path soil |