Organic matter stabilization in two Andisols of contrasting age under temperate rain forest

Neculmán, Rodrigo; Rumpel, Cornélia; Matus, Francisco; Godoy, Roberto; Steffens, Markus; Mora, Marı́a de la Luz

doi:10.1007/s00374-012-0758-2

Cited by 18 publications

(12 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In general, the respiration was correlated with phos- minerals, (allophane like-materials, Garrido and Matus, 2012;Neculman et al, 2012), Recently, it has been recognized that SOM can be micro-encapsulated inside of highly and this is an important mechanism of C stabilization (Asano and Wagai, 2014;Chevallier et al, 2010). This contrasts with the lower stabilization capacity in kaolinitic, 1:1 clay mineral soil.…”

Section: Carbon Stabilizationmentioning

confidence: 56%

“…In previous studies, Al-SOM complexes was the primary factor explaining soil C variation in similar soils rather than climatic variables and clay content (Percival et al, 2000;Matus et al, 2006). Neculman et al (2012) found an inverse relationship between soil pH and C pyrophosphate, supporting the hypothesis that the Al-SOM complexes and allophane formation are inverse, although complementary processes are mainly regulated by soil pH (Garrido and Matus, 2012;Panichini et al, 2012). In the present study, the PNP in volcanic soil with pH 6.2 could promote the allophane polymerization and thereafter SOM sorption.…”

Section: Relationship Between Metabolic Quotient (Qco 2 ) and C Stabimentioning

confidence: 99%

“…The allophanic soils in PNP is silty loam (Neculman et al, 2012), whereas in kaolinitic metamorphic soil it is clay loam (Luzio et al, 2003). The SOC in both bulk soils was similar.…”

Section: Soil Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Soil microorganisms and enzyme activity at different levels of organic matter stability

Merino

Godoy

Matus

2016

J. Soil Sci. Plant Nutr.

View full text Add to dashboard Cite

Soil biological activity has important implications for soil carbon (C) sequestration. However, very little is known about the environmental factors, particularly the effect of soil mineralogy on availability of C for soil microorganisms. In this study, we have investigated the influences of soil type (clay mineralogy) on C mineralization and its effects on biological activity at different levels of soil organic matter stability. Two soils an allophanic, derived from recent volcanic ash and a kaolinitic, resulting from metamorphic parent materials were physically fractioned in to light (LF, coarse sand 250-2000 µm), intermediate (IF, fine sand53-250 µm) and mineral (MF, silt and clay < 53 µm) fractions. Several biological and biochemical analyses at Ah horizons of mineral soil and physical fractions were conducted: soil respiration, enzymatic activities, carbohydrates and microbial biomass, amongst others soil variables. The results indicated that the bulk soil and physical fractions had a significant impact on cumulative C mineralized after 30 days of incubation and soil enzyme activities. More than 76% of total C-CO 2 variation was explained by stepwise multiple regression analysis including factors such as soil enzymes (β-glucosidase, dehydrogenase and phosphatase) and inorganic P. Soil ATP extraction was a good indicator of microbial activity, because of a positive and significant correlation among ATP and i) C-CO 2 and ii) metabolic quotient (soil respiration rate divided by microbial biomass). We also found an inverse and significant relationship between Al pyrophosphate (Al bound to SOM) and the C-CO 2 in volcanic soil, whereas the same correlation did not occur in kaolinitic soil. Our results confirmed a greater stabilization capacityof MF in allophanic than in kaolinitic soils due to the amorphous minerals clay materials.

show abstract

Section: Carbon Stabilizationmentioning

confidence: 56%

Section: Relationship Between Metabolic Quotient (Qco 2 ) and C Stabimentioning

confidence: 99%

See 1 more Smart Citation

Soil microorganisms and enzyme activity at different levels of organic matter stability

Merino

Godoy

Matus

2016

J. Soil Sci. Plant Nutr.

View full text Add to dashboard Cite

show abstract

“…Research has shown that plantderived SOM is strongly degraded and that it is the microbial SOM fraction that contributes substantially to SOM pools in Andosols (Buurman et al, 2007). Stabilization of SOM in Andosols has been attributed to i) formation of the SOM in organo-mineral and/or organo-metallic (Al/Fe-humus) complexes (Inoue and Higashi, 1988;Nanzyo et al, 1993;Neculman et al, 2013;Percival et al, 2000;Rumpel et al, 2012;Torn et al, 1997), ii) low activity of soil microorganisms due to low soil pH, Al toxicity, low base cation content, and/or P deficiency (Tokashiki and Wada, 1975;Tonneijck, 2009), iii) physical protection of the SOM in stable microaggregates characteristic of variable charge soils (Huygens et al, 2005;Baldock and Broos, 2011), iv) sorption and deactivation of exoenzymes involved in the extracellular depolymerization component of SOM decomposition (Saggar et al, 1994;Miltner and Zech, 1998), v) burial of organic-rich surface horizons by repeated additions of airfall tephra deposition, and vi) the presence of microbiallyrecalcitrant charcoal (especially in melanic epipedons) (Miyazaki et al, 2009(Miyazaki et al, , 2010Nishimura et al, 2006). The stabilization of SOM is reflected in the 14 C age of humic acids extracted from A horizons of Andosols which is reported to range from modern to 30,000 YBP, with the majority in the range 1000-5000 YBP (Inoue and Higashi, 1988).…”

Section: Organic Carbon Accumulation In Andosolsmentioning

confidence: 99%

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

2016

View full text Add to dashboard Cite

Andosols (or Andisols) possess several distinctive properties that are rarely found in other groups of soils. These properties are largely due to the dominance of short-range-ordered minerals (allophane, imogolite and ferrihydrite) and/or metal-humus complexes (Al/Fe-humus complexes) in their colloidal fraction. While several papers have extensively reviewed the nature and properties of short-range-ordered minerals, there is no comprehensive review of the genesis, characteristics and management implications of Al-humus complexes, the dominant form of active Al in non-allophanic Andosols. In this review, we survey the chemical characteristics of Al-humus complexes and discuss the pedogenic environment favoring their formation in non-allophanic Andosols. The role of Al-humus complexes in carbon cycling and soil organic carbon accumulation is emphasized as an important mechanism controlling organic dynamics in Andosols. While non-allophanic Andosols share many common properties with allophanic Andosols, they display several distinct characteristics associated with Al-humus complexes, such as strong acidity and high exchangeable Al content that impair agricultural productivity due to Al phytotoxicity. Thus, we focus on the role of Al-humus complexes in regulating aqueous Al 3+ solubility and release/retention kinetics, Al phytotoxicity, phosphorus dynamics, and suppression of soil-borne diseases. Knowledge of these soil properties as related to Al-humus complexes is necessary to develop effective soil management practices to assure sustainable agricultural productivity in non-allophanic Andosols. Finally, future research needs are identified concerning the role of Al-humus complexes in regulating soil biogeochemical processes.

show abstract

“…According to Takahashi and Dahlgren (2016), Andisols also retain relatively large amounts of SOM, accounting for about 1.8% of the global soil organic carbon. The above-mentioned large SOM accumulation in this type of soils is, in addition to the formation of stable mineral-humus complexes, derived from a combination of allophane materials and the high inputs of agricultural and forestry detritus (Neculman et al 2013). This is the consequence of a fast rate of recalcitrant HS production, together with the unfavorable environmental conditions which limit an efficient microbial degradation of the newly formed organic compounds (Dubé and Stolpe 2016).…”

Section: Introductionmentioning

confidence: 98%

Revisiting the Nature of Phosphorus Pools in Chilean Volcanic Soils as a Basis for Arbuscular Mycorrhizal Management in Plant P Acquisition

Borie

Aguilera

Castillo

et al. 2019

J Soil Sci Plant Nutr

View full text Add to dashboard Cite

This review covers the nature, characteristics, and reactivity of soil organic matter (SOM) in volcanic soils and the phosphorus (P) accumulation mainly via the formation of stable complexes with organic and inorganic constituents to form P-containing macromolecules derived from both pedogenesis and fertilization. With the time, P accumulates as organic and inorganic compounds with differing lability, but the bulk appears to be recalcitrant. Chilean volcanic soils follow this same trend, subsequently having detrimental characteristics for plant growth, like the highly humified SOM and high P-sorption capacity. In addition, certain Chilean volcanic soils have high acidity, concomitant with a high exchangeable Al. As a result of the continuous application of P fertilizers, together with a low P efficiency of plant root acquisition, a BP reservoir^has built up, giving rise to the so-called residual P. This residual P consists of the inorganic and organic P, as macromolecular structures representing the cumulative average of several decades worth of agronomic P usage. Root modifications are an essential biological intervention to deal with this P accumulation. The general root modifications that are required to mobilize the residual P are discussed in the context of biochemical modifications (root exudations) and the symbiotic alterations by arbuscular mycorrhizal (AM) fungi. For a more efficient utilization of this accumulated P, however, it is essential to investigate the chemical nature and lability of these P forms in order to determine their capacity for plant acquisition and utilization. In this context, attention is focused on P fractionation and on some 31 P-NMR analysis of residual P constituents in Andisols. The major root trait evaluated and discussed here is the AM association, which is able to be extensively modified by management practices. Finally, some potential practices to avoid the excessive application of P fertilizers in volcanic soils by using technologies of P recycling, management of AM fungal populations, or agricultural management for mobilizing the accumulated residual P are outlined.

show abstract

Organic matter stabilization in two Andisols of contrasting age under temperate rain forest

Cited by 18 publications

References 39 publications

Soil microorganisms and enzyme activity at different levels of organic matter stability

Soil microorganisms and enzyme activity at different levels of organic matter stability

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

Revisiting the Nature of Phosphorus Pools in Chilean Volcanic Soils as a Basis for Arbuscular Mycorrhizal Management in Plant P Acquisition

Contact Info

Product

Resources

About