Near-infrared characteristics of forest humus are correlated with soil respiration and microbial biomass in burnt soil |
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| Authors: | Hannu Fritze Petri Järvinen Risto Hiukka |
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| Institution: | (1) Department of Forest Ecology, Finhish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland |
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| Abstract: | Near-infrared spectroscopy and soil physicochemical determinations (pHH2O, organic matter content, total C content, NH
inf4
sup+
, total N content, cation-exchange capacity, and base saturation) were used to characterize fire-or wood ash-treated humus samples. The spectroscopic and the soil physicochemical analysis data from the humus samples were used separately to explain observed variations in soil respiration and microbial biomass C by partial least-square regression. The first regression component obtained from the physicochemical and spectroscopic characterization explained 10–12% and 60–80% of the biological variation, respectively. This suggests that information on organic material collected from near-infrared spectra is very useful for explaining biological variations in forest humus. |
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| Keywords: | Biological variation Coniferous forest Near-infrared spectrum Partial least-square regression Microbial biomass Soil respiration |
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