Particulate Organic Matter at the Field Scale: Rapid Acquisition Using Mid-infrared Spectroscopy
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| Title: | Main Title: Particulate Organic Matter at the Field Scale: Rapid Acquisition Using Mid-infrared Spectroscopy |
| Description: | Abstract: Modeling global C–cycles requires in–depth knowledge about small scale C–stocks and turnover processes. Yet, different soil organic carbon (SOC) pools reveal considerable spatio–temporal heterogeneity at the field scale which is scarcely known due to the considerable workload associated with traditional fractionation procedures. Here we investigated the potential of mid–infrared spectroscopy combined with partial least squares regression (MIRS–PLSR) for rapid assessment of different particulate organic matter (POM) pools and their spatial heterogeneity at field scale. Locally calibrated prediction models estimated the contents of SOC, POM of three size classes (POM1: 2000–250 µm; POM2: 250–53 µm; POM3: 53–20 µm), and lignin contents for 129 subsites of an Orthic Luvisol. Relations between the parameters were described using correlation analysis and Fuzzy–Kappa statistics (κ). All parameters were predicted successfully by applying local calibrations for MIRS–PLSR (R²= 0.77–0.99). The prediction model for POM1 chiefly relied on specific signals of lignin and cellulose, contents of POM2 were estimated by spectral bands assigned to degradation products as aliphatic C–H groups and aromatic moieties; carboxylic groups essentially contributed to the prediction of POM3. There was a close spatial relation between the coarse POM1 and POM2 fractions and lignin (κ= 0.77), which largely also explained variations in bulk SOC. In contrast, POM3 exhibited a less deterministic pattern in the field, probably because this pool was already hierarchical saturated, thus contributing little to spatio–temporal variations in SOC content. |
| Identifier: | 10.2136/sssaj2009.0195 (DOI) |
| Citation Advice: | Ludger Bornemann, Gerhard Welp, Wulf Amelung (2010) Particulate Organic Matter at the Field Scale: Rapid Acquisition Using Mid-infrared Spectroscopy, Soil science society of America Journal 74 4 pp. 1147-1156; doi:10.2136/sssaj2009.0195. |
Responsible Party
| Creators: | Ludger Bornemann (Owner), Gerd Welp (Author), Wulf Amelung (Author) |
| Publisher: | Elsevier Science, Amsterdam, The Netherlands |
| Publication Year: | 2012 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | B3 |
| Subject: | Keyword: MIR Spectroscopy |
File Details
| Filename: | Bornemann_et_al_2010_sssaj.pdf |
| Data Type: | Text - Article |
| File Size: | 1.8 MB |
| Dates: | Created: 19.05.2009 Issued: 30.04.2010 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
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| Download Permission: | Only Project Members |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Soil Science Society of America Journal |
| Issue: | 4 |
| Volume: | 74 |
| Number of Pages: | 10 (1147 - 1156) |
Metadata Details
| Metadata Creator: | Ludger Bornemann |
| Metadata Created: | 21.06.2012 |
| Metadata Last Updated: | 21.06.2012 |
| Subproject: | B3 |
| Funding Phase: | 1 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 2 |
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