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Impact of Olive Trees on the Microclimatic and Edaphic Environment of the Understorey Durum Wheat in an Alley Orchard of the Mediterranean Area

Authors :
Anna Panozzo
Hsin-Ya Huang
Bruno Bernazeau
Florence Meunier
Olivier Turc
Robin Duponnois
Yves Prin
Teofilo Vamerali
Dominique Desclaux
Università degli Studi di Padova = University of Padua (Unipd)
DIASCOPE
Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Écophysiologie des Plantes sous Stress environnementaux (LEPSE)
Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier
Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM)
Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier
Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM)
Département Systèmes Biologiques (Cirad-BIOS)
Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)
University of Padova BIRD210158/21
European Project: 613520,EC:FP7:KBBE,FP7-KBBE-2013-7-single-stage,AGFORWARD(2014)
Source :
Agronomy, Agronomy, 2022, 12 (2), pp.527. ⟨10.3390/agronomy12020527⟩, Agronomy (Basel), Agronomy; Volume 12; Issue 2; Pages: 527
Publication Year :
2022
Publisher :
HAL CCSD, 2022.

Abstract

In the current context of climate change, the impact of trees in agroforestry systems is expected to mitigate water and heat stresses, particularly in semi-arid environments. Within this framework, in a two-year trial conducted at INRAE in Southern France, the dynamics of microclimatic parameters and the edaphic environment of durum wheat were investigated under a yearly-pruned (AF) and a never-pruned (AF+) 6-m apart alley olive orchard, in comparison with controls under full sun. Here it was recorded a reduction of photosynthetic active radiation (PAR) by 30% and 51% in AF and AF+, respectively, during the wheat cycle, together with a marked reduction of wind speed compared to controls (–85% in AF and −99% in AF+). A significant buffer effect was also highlighted for air temperature, averagely +1.7 °C during the night and −3.2 °C during the daytime under the moderate shading of AF. The positive effect of trees on soil water conservation increased with the intensity of shading, particularly during the critical wheat stage of grain filling, with benefits on wheat root mycorrhization, and NH4+ and NO3− abundance in the arable layer. Despite some of the environmental modifications being favorable for the understorey wheat, these were not translated into yield improvements, suggesting that the severe shading associated with the small inter-row and evergreen trees has a prevailing effect, that requires to be managed through appropriate tree pruning.

Details

Language :
English
ISSN :
20734395
Database :
OpenAIRE
Journal :
Agronomy, Agronomy, 2022, 12 (2), pp.527. ⟨10.3390/agronomy12020527⟩, Agronomy (Basel), Agronomy; Volume 12; Issue 2; Pages: 527
Accession number :
edsair.doi.dedup.....577ef32863e0a08ac741a084be3fdecd