Studying the Physical Protection of Soil Carbon with Quantitative Infrared Spectroscopy
| Autor: | Ernest Kouakoua, Tiphaine Chevallier, Patricia Moulin, Bernard Barthès, Joële Toucet, Tahar Gallali, Kaouther Hmaidi, Emmanuel Bourdon, Michael Clairotte, Martial Bernoux |
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| Přispěvatelé: | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université de Tunis El Manar (UTM), RIME–PAMPA project (AFD -Agence française de développement), GESSOL programme of the French Ministry of ecology, sustainable development and energy, contract ADEME – IRD – INRA Montpellier N°0975C0035, IRD, UMR Eco&Sols, Montpellier, France, This work was supported by the GESSOL program of the French Ministry of ecology, sustainable development and energy, by ADEME (Agence de l'environnement et de la maîtrise de l'énergie, which is a French government agency concerned with environmental protection and energy management, contract ADEME – IRD – INRA Montpellier N°0975C0035), and by the RIME–PAMPA project funded by AFD (Agence française de développement, which is a French public financial institution dedicated to development assistance to developing countries), the French Ministry for foreign affairs, and FFEM (Fonds français pour l'environnement mondial, which is a French public funding agency dedicated to environment protection in developing countries)., Viscarra Rossela, R.A. (ed.), Stenberg, B. (ed.) |
| Rok vydání: | 2016 |
| Předmět: |
Near infrared reflectance spectroscopy (NIRS)
Carbon sequestration Materials science 010504 meteorology & atmospheric sciences Soil test Carbonates Analytical chemistry chemistry.chemical_element Infrared spectroscopy 01 natural sciences Soil respiration [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Spectroscopy Mid-infrared spectroscopy 0105 earth and related environmental sciences Soil organic matter Topsoil SOL Mid-infrared reflectance spectroscopy (MIRS) MATIERE ORGANIQUE SPECTROSCOPIE 04 agricultural and veterinary sciences Soil carbon 15. Life on land CARBONE REFLECTANCE RESPIRATION Near infrared reflectance spectroscopy chemistry 13. Climate action Environmental chemistry [SDE]Environmental Sciences 040103 agronomy & agriculture 0401 agriculture forestry and fisheries ANALYSE MULTIVARIABLE Carbon |
| Zdroj: | Journal of Near Infrared Spectroscopy Journal of Near Infrared Spectroscopy, NIR Publications, 2016, 24 (3), pp.199-214. ⟨10.1255/jnirs.1232⟩ Journal of Near Infrared Spectroscopy, 2016, 24 (3), pp.199-214. ⟨10.1255/jnirs.1232⟩ |
| ISSN: | 1751-6552 0967-0335 1364-6575 |
| Popis: | Near infrared (NIR) and mid-infrared (mid-IR) reflectance spectroscopy are time- and cost-effective tools for characterising soil organic carbon (SOC). Here they were used for quantifying (i) carbon (C) dioxide (CO2) emission from soil samples crushed to 2 mm and 0.2 mm, at 18°C and 28°C; (ii) physical C protection, calculated as the difference between CO2 emissions from 0.2 mm and 2 mm crushed soil at a given temperature; and (iii) the temperature vulnerability of this protection, calculated as the difference between C protection at 18°C and 28°C. This was done for 97 topsoil samples from Tunisia, mostly calcareous, which were incubated for 21 days. Soil CO2 emission increased with temperature and fine crushing. However, C protection in 0.2–2 mm aggregates had little effect on the temperature vulnerability of CO2 emission, possibly due to preferential SOC protection in smaller aggregates. In general, NIR spectroscopy, and to a lesser extent mid-IR spectroscopy, yielded accurate predictions of soil CO2 emission (0.60 ≤ R2 ≤ 0.91), and acceptable predictions of C protection at the beginning of incubation (0.52 ≤ R2 ≤ 0.81) but not over the whole 21 day period ( R2 ≤ 0.59). For CO2 emission, prediction error was the same order of magnitude as, and sometimes similar to, the uncertainty of conventional determination, indicating that a noticeable proportion of the former could be attributed to the latter. The temperature vulnerability of C protection could not be modelled correctly ( R2 ≤ 0.11), due to error propagation. The prediction of SOC was better with NIR spectroscopy and that of soil inorganic C (SIC) was very accurate ( R2 ≥ 0.94), especially with mid-IR spectroscopy. Soil CO2 emission, C protection and its vulnerability were best predicted with NIR spectra, those of 0.2 mm samples especially. Mid-IR spectroscopy of 2 mm samples yielded the worst predictions in general. NIR spectroscopy prediction models suggested that CO2 emission and C protection depended (i) on aliphatic compounds (i.e. labile substrates), dominantly at 18°C; (ii) on amides or proteins (i.e. microbial biomass), markedly at 28°C; and (iii) negatively, on organohalogens and aromatic amines (i.e. pesticides). Models using mid-IR spectra showed a negative influence of carbonates on CO2 emission, suggesting they did not contribute to soil CO2 emission and might form during incubation. They also suggested that CO2 emission and C protection related to carboxylic acids, saturated aliphatic ones especially. |
| Databáze: | OpenAIRE |
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