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Article

Going Beyond Soil Conservation with the Use of Cover Crops in Mediterranean Sloping Olive Orchards

1
Institute for Sustainable Agriculture, Spanish National Research Council (CSIC), Alameda del Obispo s/n, 14080 Córdoba, Spain
2
Instituto de Ciencias de la Vid y el Vino (ICVV), CSIC-Universidad de la Rioja—Gobierno de La Rioja, Finca La Grajera, Ctra. LO-20 Salida 13, 26007 Logroño, Spain
*
Author to whom correspondence should be addressed.
Both authors have contributed equally.
Academic Editors: Bořivoj Šarapatka, Miroslav Dumbrovský and Jana Podhrázská
Agronomy 2021, 11(7), 1387; https://doi.org/10.3390/agronomy11071387
Received: 14 June 2021 / Revised: 23 June 2021 / Accepted: 7 July 2021 / Published: 9 July 2021
(This article belongs to the Special Issue Land Management Impacts on Soil Properties and Soil Erosion Processes)
Among the agricultural practices promoted by the Common Agricultural Policy to increase soil functions, the use of cover crops is a recommended tool to improve the sustainability of Mediterranean woody crops such as olive orchards. However, there is a broad range of cover crop typologies in relation to its implementation, control and species composition. In that sense, the influence of different plant species on soil quality indicators in olive orchards remains unknown yet. This study describes the effects of four treatments based on the implementation of different ground covers (CC-GRA: sown cover crop with gramineous, CC-MIX: sown cover crop with a mixture of species and CC-NAT: cover crop with spontaneous vegetation) and conventional tillage (TILL) on soil erosion, soil physicochemical and biological properties after 8 years of cover crop establishment. Our results demonstrated that the presence of a temporary cover crop (CC), compared to a soil under tillage (TILL), can reduce soil losses and maintain good soil physicochemical properties and modify greatly the structure and diversity of soil bacterial communities and its functioning. The presence of a homogeneous CC of gramineous (Lolium rigidum or Lolilum multiflorum) (CC-GR) for 8 years increased the functional properties of the soil as compared to TILL; although the most relevant change was a modification on the bacterial community composition that was clearly different from the rest of treatments. On the other hand, the use of a mixture of plant species (CC-MIX) as a CC for only two years although did not modify greatly the structure and diversity of soil bacterial communities compared to the TILL soil, induced significant changes on the functional properties of the soil and reverted those properties to a level similar to that of an undisturbed soil that had maintained a natural cover of spontaneous vegetation for decades (CC-NAT). View Full-Text
Keywords: bacterial community composition; metabolic activity; microbial diversity; soil erosion; soil quality bacterial community composition; metabolic activity; microbial diversity; soil erosion; soil quality
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MDPI and ACS Style

Arias-Giraldo, L.F.; Guzmán, G.; Montes-Borrego, M.; Gramaje, D.; Gómez, J.A.; Landa, B.B. Going Beyond Soil Conservation with the Use of Cover Crops in Mediterranean Sloping Olive Orchards. Agronomy 2021, 11, 1387. https://doi.org/10.3390/agronomy11071387

AMA Style

Arias-Giraldo LF, Guzmán G, Montes-Borrego M, Gramaje D, Gómez JA, Landa BB. Going Beyond Soil Conservation with the Use of Cover Crops in Mediterranean Sloping Olive Orchards. Agronomy. 2021; 11(7):1387. https://doi.org/10.3390/agronomy11071387

Chicago/Turabian Style

Arias-Giraldo, Luis F., Gema Guzmán, Miguel Montes-Borrego, David Gramaje, José A. Gómez, and Blanca B. Landa 2021. "Going Beyond Soil Conservation with the Use of Cover Crops in Mediterranean Sloping Olive Orchards" Agronomy 11, no. 7: 1387. https://doi.org/10.3390/agronomy11071387

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