Micromorphological and 13C NMR characterization of a Humic, Lignic, and Histic Folisol from British Columbia
| Autor: | C. M. Preston, C. A. Fyfe, C. A. Fox |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
chemistry.chemical_classification
biology Soil organic matter Soil Science Mineralogy Context (language use) Carbon-13 NMR biology.organism_classification Characterization (materials science) chemistry Environmental chemistry Western Hemlock Soil horizon Environmental science Organic matter Chemical composition |
| Zdroj: | Canadian Journal of Soil Science. 74:1-15 |
| ISSN: | 1918-1841 0008-4271 |
| DOI: | 10.4141/cjss94-001 |
| Popis: | The thick folic (mainly upland forest) materials (> 40 cm of accumulated organic material) that occur in the Coastal Western Hemlock Biogeoclimatic Zone in British Columbia have not been described with regard to the spatial interrelationships of the soil constituents in context with the chemical composition of the different horizons. Micromorphological assessment and solid-state 13C NMR were used to characterize the accumulated folic materials from a Lignic Folisol (northern Vancouver Island), Histic Folisol (Prince Rupert, BC) and a Humic Folisol (Queen Charlotte Islands, BC). Micromorphology provided information on the spatial relationships of the soil constituents and 13C NMR provided data on the chemical components of the folic materials. Soil faunal activity, primarily from mites, was the dominant soil-forming process observed in the organic horizons of the Folisols, being especially prominent in the Lignic Folisol with the breakdown of woody materials. Solid state 13C CPMAS NMR spectra facilitated distinguishing three main types of horizons: (1) Horizons derived from accumulated residues (L, Fr, and Hr) showing higher carbohydrate-like C and O-alkyl C values and lower total aromatics; (2) Horizons with advanced decomposition (Hr2, Oh1, and Hd) which were higher in alkyl C; and (3) Horizons derived from ligneous material (Fw and Hdw) where carbohydrate-like C was less than total aromatic C. Implications for adequate nutrient content and forest growth were inferred from the observed micromorphology and chemical composition of the folic materials. Key words: Folisol, forest soils, micromorphology, 13C NMR, faunal activity |
| Databáze: | OpenAIRE |
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