Pyrolisis-MS and FT-IR analysis of fresh and decomposed dairy manure

Calderón, Francisco J.; McCarty, Gregory W.; Reeves, James B.

doi:10.1016/j.jaap.2005.06.009

Cited by 66 publications

(41 citation statements)

References 19 publications

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“…6). Decomposition of manure in soils increases the aromatic C=C band near 1510 cm −1 , showing that this could be an indication of humification and more processed forms of C (Calderón et al, 2006). Demyan et al (2012) hypothesized that 1660 to 1580 cm −1 is intermediately stable C in soil spectra, which agrees with some aromatic influence.…”

Section: Discussionmentioning

confidence: 92%

“…The MidIR data show that, as expected, cellulose increased absorbance at 3400, 2970 to 2800, 2200 to 2000, and 1030 to 1160 cm −1 . Bands near 3400 and 2870 cm −1 represent relatively labile C and decline during decomposition of organic soil amendments (Calderón et al, 2006). Absorbance around 1100 cm −1 has been related to soil aggregation, possibly because of the presence of polysaccharide binding agents in soil (Sarkhot et al, 2007), however, this band is within the inversion caused by specular reflection of silica in neat soils.…”

Section: Discussionmentioning

confidence: 99%

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Diffuse-Reflectance Fourier-Transform Mid-Infrared Spectroscopy as a Method of Characterizing Changes in Soil Organic Matter

Calderón

Haddix

Conant

et al. 2013

Soil Science Society of America Journal

124

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Diffuse-Reflectance Fourier-Transform Mid-Infrared Spectroscopy as a Method of Characterizing Changes in Soil Organic Matter

Calderón

Haddix

Conant

et al. 2013

Soil Science Society of America Journal

124

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“…Th e increase in protein could be explained by the growth of the microbial biomass and production of microbial proteins during incubation. Calderón et al (2006) found that infrared bands associated with proteins increased during manure incubation. Besides the production of microbial proteins, the spectral data suggests that there is an enrichment in highly aromatic C. Increase in the aromatic band suggest that humic acids are left over aft er the easily degraded C is removed.…”

Section: Changes Of Soil Fraction Spectra During Incubationmentioning

confidence: 99%

Chemical Differences in Soil Organic Matter Fractions Determined by Diffuse‐Reflectance Mid‐Infrared Spectroscopy

Calderón

Reeves

Collins

et al. 2011

Soil Science Soc of Amer J

Self Cite

155

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U nderstanding SOM composition and cycling is fundamental because SOM contains large nutrient pools for crop growth, aff ects the soil physical properties necessary for roots to thrive, and can serve as a source or a sink for atmospheric CO 2 (Lal, 2004). Th e stability of soil organic carbon (SOC) is determined by interactive eff ects of climate, parent material, soil depth, and agronomic management (Collins et al., 2000), and there is still much to be learned about OM quality and dynamics.One approach to the study of SOM quality is fractionation by particle size and settling characteristics. Th e fractions consist of the LF made up of low density plant material, the POM included with the sand-sized material and protected C in aggregates, and the silt (silt) and clay-size (clay) separates (Haile-Mariam et al., 2008). Soil fractionation has given insight into the complexity of SOM, uncovering a range of C age, N content, and chemical makeup (Paul et al., 2001). In Corn Belt soils, the LF and POM contain relatively labile C and can comprise up to 5 and 11% of the SOC, respectively (Haile-Mariam et al., 2008). Th e LF contains plant residues and has a shorter C turnover time than the other particle-size fractions. In contrast, the silt and clay fractions tend to have more recalcitrant C than the other fractions (Christensen, 1987).Extended laboratory incubations help characterize soils because the active C pools are transformed by microbial enzymes while the resistant SOC is less aff ected We performed mid-infrared (MidIR) spectral interpretation of fractionated fresh and incubated soils to determine changes in soil organic matter (SOM) chemistry during incubation. Soils from four sites and three depths were processed to obtain the light fraction (LF), particulate organic matter (POM), silt-sized (silt), and clay-sized (clay) fractions. Our results show that the LF and clay fractions have distinct spectral features regardless of site. Th e LF is characterized by absorbance at 3400 cm −1 , as well as between 1750 and 1350 cm −1 . Th e clay fraction is distinguished by absorption near 1230 cm −1 , and absorption at 780 to 620 cm −1 . Th e POM, like the LF, absorbs at the broad peak at 1360 cm −1 . High SOM soils are characterized by absorbance at 1230 cm −1 , a band for aromatics, possibly associated with resistant C. Soils from diff erent sampling depths have specifi c spectral properties. A band at 1330 cm −1 is characteristic of shallow depths. Because of their low organic matter (OM) content, the deeper samples are characterized by mineral bands such as quartz, clays, and carbonate. Spectroscopic data indicates that the clay fraction and the LF suff ered measurable chemical transformations during the 800-d incubation, but the POM and silt fraction did not. As the LF decomposes, it loses absorbance at 3400, 1223, and 2920 to 2860 cm −1 . Th e band at 1630 cm −1 increased during incubation, suggesting a resistant form of organic C. Th e clay fraction suff ered changes that were opposite to those of the LF, indicat...

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“…Several studies have used ratios of specific spectral bands in environmental samples and soils to study the chemical composition of SOM (Artz et al, 2006;Calderón et al, 2006;Ellerbrock et al, 2005). Ellerbrock et al (2005) related the wettability of soils to hydrophilic to hydrophobic band ratios.…”

Section: Differentiating Mineral and Organic Spectral Absorbancementioning

confidence: 99%