Decomposition of 14C-labeled glucose, plant and microbial products and phenols in volcanic ash-derived soils of chile

Modified rothamsted carbon model for andosols and its validation: changing humus decomposition rate constant with pyrophosphate-extractable Al

“…Further testing of the time changes in BIO and 14C will make this model robust. Moreover, Zunino et al (1982) reported that the presence of allophanic materials reduced the decomposition of 14C-labelled plant materials. Long-term incubation experiments using labelled substrates may provide useful information about modelling of the SOC content in Andosols.…”

Microbial biomass nitrogen and mineralization-immobilization processes of nitrogen in soils incubated with various organic materials

“…Ando soils are characterized by a high humus content, a high active AI content and a high P fixation capacity (Inoue 1986). Zunino et al (1982) indicated that the mineralization rates of organic materials labelled with ~4C decreased in Ando soils, compared with non-allophanic soils. As already mentioned, the remineralization of the N immobilized by the addition of farmyard manure was prolonged in the Chitose soil, suggesting that the Ando soils are different from the other soils in their metabolic processes.…”

Nature, properties and function of aluminum–humus complexes in volcanic soils

“…Several studies have suggested that chemical stabilization of SOM via formation of Al-humus complexes is an important process for SOM accumulation in Andosols (e.g., Zunino et al, 1982;Inoue and Higashi, 1988;Egashira et al, 1997;Baldock and Skjemstad, 2000;Percival et al, 2000;Rasmussen et al, 2006;Takahashi et al, 2012). Al-humus complexes may facilitate protection of organic C directly by rendering functional groups more condensed and less assessable to enzymatic attack and indirectly by promoting adsorption to mineral surface (as Al-humic-mineral complexes), particle cementation, and the formation of stable micro-and macro-aggregate structures (Oades, 1988).…”