ORGANIC CARBON MINERALIZED IN SHORT AEROBIC INCUBATION PERIODS AS SOIL HEALTH INDICATOR

Authors

  • Tourn Facultad de Ciencias Agrarias, Univ. Nac. Mar del Plata, Unidad Integrada Balcarce / Actividad privada https://orcid.org/0000-0002-5977-8218
  • Cecilia del Carmen Videla Facultad de Ciencias Agrarias, Univ. Nac. Mar del Plata, Unidad Integrada Balcarce https://orcid.org/0000-0003-1883-2529
  • Camila Rivero Actividad Privada
  • Gisela Vanesa García Facultad de Ciencias Agrarias, Univ. Nac. Mar del Plata, Unidad Integrada Balcarce / Consejo Nacional de Investigaciones Científicas y Técnicas https://orcid.org/0000-0002-0628-7917
  • Débora Josela Ricciuto Facultad de Ciencias Agrarias, Univ. Nac. Mar del Plata, Unidad Integrada Balcarce
  • Silvia Rodriguez Facultad de Ciencias Agrarias, Univ. Nac. Mar del Plata, Unidad Integrada Balcarce
  • Guillermo Alberto Studdert Fac. Cs. Agrarias, UNMdP, Unidad Integrada Balcarce https://orcid.org/0000-0002-8611-4441

Keywords:

cropping systems, crop-pasture rotations, CO2 emission, incubation period

Abstract

Soil functioning is affected by agriculture. Therefore, sustainable soil use requires frequent soil health monitoring. Soil health indicators (ISE) allow to do soil health evaluation simply and periodically. The carbon (C) dioxide emission during short aerobic incubations (Cmin) could be used as an ISE. However, its performance as ISE has not been sufficiently evaluated. The objective of this work was to evaluate the sensitivity of Cmin at 2 (Cmin2), 4 (Cmin4), 6 (Cmin6), and 10 (Cmin10) days of incubation to the effect of different management practices and their relationship with total (COT), mineral associated (COA), particulate (COP), potentially mineralizable (C0), and potassium permanganate oxidizable (CoxP) organic C, anaerobically mineralized nitrogen (NAN), and aggregate stability of a Mollisol from the southeastern Buenos Aires province. We determined Cmin2, Cmin4, Cmin6, and Cmin10, COT, COA, COP, C0, CoxP, NAN, and EA (remnant mass of macroaggregates, MasaMAMV) in soil samples (0-5 and 5-20 cm) from a long-term experiment in Balcarce including crop-pasture rotations under conventional tillage and no-tillage (SD). As expected, the Cmin showed a similar pattern as the rest of the variables reflecting the effect of the different management practices with greater values observed under pasture and SD, especially at 0-5 and 0-20 cm. The ability of the Cmin to show the effect of the management practices evaluated increased with the increase of the duration of the incubation. The Cmin correlated (Pearson r) to COT, COP, C0, CoxP, NAN, and MasaMAMV (r=0.52 to r=0.96) (P<0.01) with coefficients increasing with the days of incubation. It is concluded that Cmin4 (r=0.59 to r=0.88) or Cmin6 (r=0.52 to r=0.93) could be used as adequate ISE. It is necessary to continue studying these relationships under contrasting soil, climate and management conditions.

Author Biography

Guillermo Alberto Studdert, Fac. Cs. Agrarias, UNMdP, Unidad Integrada Balcarce

Full Professor

Dept. Prod. Vegetal, Suelos e Ingeniería Rural (Plant Sciences, Soils and Rural Engineering)

Facultad de Ciencias Agrarias (Faculty of Agricultural Sciences)

Universidad Nacional de Mar del Plata (National University of Mar del Plata)

Unidad Integrada Balcarce (Balcarce Integrated Unit)

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30-12-2024

How to Cite

Tourn, Videla, C. del C., Rivero, C., García, G. V., Ricciuto, D. J., Rodriguez, S., & Studdert, G. A. (2024). ORGANIC CARBON MINERALIZED IN SHORT AEROBIC INCUBATION PERIODS AS SOIL HEALTH INDICATOR. Ciencia Del Suelo, 42(2). Retrieved from https://ojs.suelos.org.ar/index.php/cds/article/view/870

Issue

Vol. 42 No. 2 (2024)

Section

Manejo y Conservación de Suelos y Aguas. Riego y Drenaje

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Copyright (c) 2024 Santiago Tourn, Cecilia Videla, Camila Rivero, Gisela garcía, Débora Ricciuto, Silvia Rodriguez, Guillermo Alberto Studdert

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