Near-infrared spectroscopy for determination of soil organic C, microbial biomass C and C and N fractions in a heterogeneous sample of German arable surface soils. Issue 11 (19th September 2017)

• Record Type: Journal Article
• Authors: Linsler, Deborah; Sawallisch, Anja; Höper, Heinrich; Schmidt, Harald; Vohland, Michael; Ludwig, Bernard
• Is Part Of: Archives of agronomy and soil science. Volume 63:Issue 11(2017)
• Page Start: 1499
• Page End: 1509
• Publication Date: 2017-09-19
• Subjects: Heterogeneous sample -- carbon fractions -- nitrogen fractions -- cross-validation; Horticulture -- Periodicals; Soils -- Periodicals; 630.5
• DOI: 10.1080/03650340.2017.1292030
• Languages: English
• ISSNs: 0365-0340

Abstract

ABSTRACT: Visual and near-infrared spectroscopy (vis-NIRS) is an established method to estimate soil properties. However, only limited information is available to estimate C and N fractions in a heterogeneous sample. The objectives of our study were to determine estimation accuracies of vis-NIRS using two software for soil organic carbon (SOC), total nitrogen (Nt ), pH, texture, and C and N fractions (light (LF), mineral (MF), labile, intermediate and passive fractions) in a heterogeneous sample (consisting of 51 units with different mineralogy) and to compare these results with those obtained by mid-infrared spectroscopy (MIRS). Analyzing vis-NIRS spectra and the mentioned properties showed a possibility to distinguish between high and low values for SOC (residual prediction deviation (RPD) = 1.90) and Nt (RPD = 1.93). Sand and clay could be estimated, whereas pH and silt could not. No useful estimation was possible for N-LF, passive C, intermediate C or intermediate N. C-LF, C-MF and N-MF could be differentiated between high and low values, whereas for passive N the estimation was approximate quantitative. MIRS reached one or two times higher estimation categories than vis-NIRS for SOC, Nt, pH and texture, suggesting that MIRS has a higher potential to estimate soil properties in a heterogeneous sample.