Stover management modifies soil organic carbon dynamics in the short-term under semiarid continuous maize

Álvaro-Fuentes J. (Universidad de Zaragoza) ; Franco-Luesma S. ; Lafuente V. (Universidad de Zaragoza) ; Sen P. (Universidad de Zaragoza) ; Usón A. ; Cantero-Martínez C. ; Arrúe J.L.

Resumen: In croplands, the adoption of certain management practices may increase soil organic carbon (SOC) levels. In this study, we evaluated the short-term impact of crop stover management and the interaction between crop stover and irrigation method on SOC change in a continuous maize (Zea mays L.) system in Spain. Four years after the beginning of the experiment, total SOC and C fractions (particulate organic matter carbon, POM-C; and mineral-associated organic matter carbon, Min-C) contents, SOC stocks and SOC stock changes were measured in four different soil layers (0-5, 5-10, 10-25 and 25-50 cm) in an experiment with two irrigation methods (sprinkler and flood) and three stover management systems (conventional tillage with all the stover incorporated, CT; no-tillage maintaining the stover, NTr; and no-tillage removing the stover, NT). Stover management resulted in significant differences in SOC and POM-C but not in Min-C. In particular, NT reduced SOC and POM-C contents compared with CT and NTr (about 10 and 60 %, respectively). After 4 years, SOC change was not affected by the interaction between stover management and irrigation. Concurrently, both CT and NT showed SOC losses, reaching 0.11 and 1.22 Mg ha-1 yr-1 in CT and NT, respectively. However, NTr showed SOC gains at a rate of 0.09 Mg ha-1 yr-1. Consequently, the removal of crop stover has been demonstrated as a detrimental strategy to store SOC in the short-term in irrigated continuous maize systems. © 2021 The Authors

Idioma: Inglés

DOI: 10.1016/j.still.2021.105143

Año: 2021

Publicado en: Soil and Tillage Research 213 (2021), 105143 [6 pp.]
ISSN: 0167-1987

Factor impacto JCR: 7.366 (2021)

Categ. JCR: SOIL SCIENCE rank: 5 / 39 = 0.128 (2021) - Q1 - T1

Factor impacto CITESCORE: 10.0 - Earth and Planetary Sciences (Q1) - Agricultural and Biological Sciences (Q1)

Factor impacto SCIMAGO: 1.806 - Earth-Surface Processes (Q1) - Agronomy and Crop Science (Q1)

Financiación: info:eu-repo/grantAgreement/ES/AEI/AGL2017-84529-C3-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/AGL2013-49062-C4-4-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Producción Vegetal (Dpto. CC.Agrar.y Medio Natural)
Área (Departamento): Área Edafología y Quím.Agríco. (Dpto. CC.Agrar.y Medio Natural)