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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zastosowanie spektroskopii w bliskiej podczerwieni (NIR) do oznaczania zawartości C, N, S, P i kationów metali w materii organicznej gleb leśnych
    (Wydawnictwa AGH, 2005) Chodak, Marcin 
    Fast and cost-effective analytical methods may be required in land-scape-scaled soil research. The objective of this study was to assess the usefulness of near infrared spectroscopy (NIRS) to measure total contents of C, N, P, S, Na, K, Ca, Mg, Mn, Fe, Al, Zn, Cu, Cd and Pb in organic layers of forest soils. The forest floor samples (n = 158) were analysed for contents of the considered elements using standard methods. The speetra were recorded in Vis-Nir region (400-2500 nm). A half of the sample population was used to develop calibration equations and a second half was used for validation. NIRS predicted well the contents of C, N, S, Na, K, Fe, Al and Pb - the regression coefficients a of a linear regression (measured against predicted values) ranged from 0.89 to 1.05 and the correlation coefficients r from 0.88 to 0.97. The contents of Ca, Cu and Cd were predicted satisfactorily (r = 0.81-0.85, a = 1.09-1.13). NIRS failed to predict the contents of P, Mg and Zn (r = 0.69-0.78, a = 0.67-1.19). This failure was probably due to restricted number of samples used for calibration (P) or due to the presence of the samples from limed forest stands. The presented results indicate usefulness of NIRS to measure contents of several elements in forest floors in land-scape-scaled monitoring.