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Fertilization intensifies drought stress: Water use and stomatal conductance of Pinus taeda in a midrotation fertilization and throughfall reduction experiment

hal.structure.identifierDepartment of Forestry and Environmental Resources
dc.contributor.authorWARD, Eric J.
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDOMEC, Jean-Christophe
hal.structure.identifierDepartment of Forest Resources and Environmental Conservation [Blacksburg]
dc.contributor.authorLAVINER, Marshall A.
hal.structure.identifierDepartment of Forest Resources and Environmental Conservation [Blacksburg]
dc.contributor.authorFOX, Thomas R.
hal.structure.identifierEastern Forest Environmental Threat Assessment Center
dc.contributor.authorSUN, Ge
hal.structure.identifierEastern Forest Environmental Threat Assessment Center
hal.structure.identifierUnited States Department of Agriculture [USDA]
dc.contributor.authorMCNULTY, Steve
hal.structure.identifierDepartment of Forestry and Environmental Resources
dc.contributor.authorKING, John
hal.structure.identifierDepartment of Forestry and Environmental Resources
dc.contributor.authorNOORMETS, Asko
dc.date.accessioned2024-04-08T12:01:32Z
dc.date.available2024-04-08T12:01:32Z
dc.date.issued2015
dc.identifier.issn0378-1127
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196158
dc.description.abstractEnWhile mid-rotation fertilization increases productivity in many southern pine forests, it remains unclear what impact such management may have on stand water use. We examined the impact of nutrient and water availability on stem volume, leaf area, transpiration per unit ground area (EC) and canopy conductance per unit leaf area (GS) of a pine plantation during its 8th and 9th growing seasons. Treatments consisted of a factorial combination of throughfall reduction (30% reduction in throughfall versus ambient) and fertilization (a complete suite of essential nutrients) beginning in April 2012. Overall, our results indicate that despite unusually high rainfall in the study period and a lack of leaf area index (LAI) response, both EC and GS decreased in response to fertilization and throughfall reduction. Fertilization increased stem volume increment 21% in 2013. Treatment differences were greatest in the growing season of 2013, when EC was on average 19%, 13% and 29% lower in the throughfall reduction (D), fertilization (F) and combined treatment (FD) than the control (C), respectively. The responses of GS to volumetric soil water content (VWC) indicate that lower EC in F was associated with a decrease relative to C in GS at high VWC. Decreases of GS in D relative to C were associated with lower VWC, but little change in the response of GS to VWC. Decreases observed in FD resulted from a combination of these two factors. The pattern of GS responses in the different treatments suggests that structural or physiological changes underlie this fertilization response, possibly in fine root area or hydraulic conductivity. In the short term, this led to large increases in the water use efficiency of stem production, which could suggest greater resiliency to minor water stress. However, impacts on long-term sensitivity to drought remain a concern, as the EC reduction triggered by the fertilization treatment was of comparable magnitude to the 30% throughfall exclusion treatment and the greatest reductions were found in the combined treatment.
dc.language.isoen
dc.publisherElsevier
dc.subjectgas exchange
dc.subjectsap flux
dc.subjecttranspiration
dc.subject.enfertilization
dc.subject.endrought
dc.subject.enloblolly pine
dc.title.enFertilization intensifies drought stress: Water use and stomatal conductance of Pinus taeda in a midrotation fertilization and throughfall reduction experiment
dc.typeArticle de revue
dc.identifier.doi10.1016/j.foreco.2015.04.009
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
bordeaux.journalForest Ecology and Management
bordeaux.page72-82
bordeaux.volume355
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02640492
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02640492v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Forest%20Ecology%20and%20Management&rft.date=2015&rft.volume=355&rft.spage=72-82&rft.epage=72-82&rft.eissn=0378-1127&rft.issn=0378-1127&rft.au=WARD,%20Eric%20J.&DOMEC,%20Jean-Christophe&LAVINER,%20Marshall%20A.&FOX,%20Thomas%20R.&SUN,%20Ge&rft.genre=article


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