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Effects of three irrigation strategies on gas exchange relationships, plant water status, yield components and water productivity on grafted carmenere grapevines

dc.contributor.authorZuniga, Mauricioen_ZA
dc.contributor.authorOrtega-Farias, Samuelen_ZA
dc.contributor.authorFuentes, Sigfredoen_ZA
dc.contributor.authorRiveros-Burgos, Camiloen_ZA
dc.contributor.authorPoblete-Echeverria, Carlosen_ZA
dc.date.accessioned2020-04-08T15:04:19Z
dc.date.available2020-04-08T15:04:19Z
dc.date.issued2018-07-12en_ZA
dc.identifier.citationZuniga, M., et al. 2018. Effects of three irrigation strategies on gas exchange relationships, plant water status, yield components and water productivity on grafted carmenere grapevines. Frontiers in Plant Science, 9:992, doi:10.3389/fpls.2018.00992
dc.identifier.issn1664-462X (online)
dc.identifier.otherdoi:10.3389/fpls.2018.00992
dc.identifier.urihttp://hdl.handle.net/10019.1/107673
dc.descriptionCITATION: Zuniga, M., et al. 2018. Effects of three irrigation strategies on gas exchange relationships, plant water status, yield components and water productivity on grafted carmenere grapevines. Frontiers in Plant Science, 9:992, doi:10.3389/fpls.2018.00992
dc.descriptionThe original publication is available at https://www.frontiersin.org
dc.description.abstractIn the Chilean viticultural industry, Carménère is considered an emblematic cultivar that is cultivated mainly in arid and semi-arid zones. For this reason, it is necessary to use precise irrigation scheduling for improving water use efficiency (WUE), water productivity (WP), yield and wine quality. This study evaluated the effects of three deficit irrigation strategies on gas exchange variables, WUE, WP and yield components in a drip-irrigated Carménère vineyard growing under semi-arid climatic conditions during two consecutive seasons (2011/12 and 2012/13). The irrigation strategies were applied in completely randomized design from fruit set (S) to harvest (H). The first irrigation strategy (T1) involved continuous irrigation at 100% of actual evapotranspiration (ETa) from S to the veraison (V) period and at 80% of ETa from V to H. The second irrigation strategy (T2) involved irrigation at 50% of ETa from S to H and the third one (T3) involved no-irrigation from S to V and at 30% of ETa from V to H. The results indicated that there was a significant non-linear correlation between net CO2 assimilation (AN) and stomatal conductance (gs), which resulted in three zones of water stress (zone I = gs > 0.30 mol H2O m-2s-1; zone II = between 0.06 and 0.30 mol H2O m-2s-1; and zone III = gs < 0.06 mol H2O m-2s-1). The use of less water by T2 and T3 had a significant effect on yield components, with a reduction in the weight and diameter of grapes. A significant increase in WP (7.3 kg m-3) occurred in T3, which resulted in values of WUE that were significantly higher than those from T1 and T2. Also, a significant non-linear relationship between the integral water stress (SIΨ) and WP (R2 = 0.74) was established. The results show that grafted Carménère vines were tolerant to water stress although differences between cultivars/genotypes still need to be evaluated.en_ZA
dc.description.urihttps://www.frontiersin.org/articles/10.3389/fpls.2018.00992/full
dc.format.extent13 pages
dc.language.isoen_ZAen_ZA
dc.publisherFrontiers Media
dc.subjectCarmenere grapevinesen_ZA
dc.subjectWine and wine making -- Europeen_ZA
dc.subjectVineyards -- Irrigation -- Europeen_ZA
dc.subjectGrapes -- Yields -en_ZA
dc.subjectRain and rainfall -- Effect of irrigation onen_ZA
dc.subjectGas exchange in plantsen_ZA
dc.subjectWater-supply, Agricultural -- Managementen_ZA
dc.subjectGas exchange relationshipsen_ZA
dc.titleEffects of three irrigation strategies on gas exchange relationships, plant water status, yield components and water productivity on grafted carmenere grapevinesen_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's version
dc.rights.holderAuthors retain copyright


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