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Effect of irrigation cut-off strategies on yield, water productivity and gas exchange in a drip-irrigated hazelnut (Corylus avellana L. cv. Tonda di Giffoni) orchard under semiarid conditions

dc.contributor.authorOrtega-Farías, Samuel
dc.contributor.authorVillalobos-Soublett, Emilio
dc.contributor.authorRiveros-Burgos, Camilo
dc.contributor.authorZúñiga, Mauricio
dc.contributor.authorAhumada-Orellana, Luis
dc.date.accessioned2020-09-29T15:31:59Z
dc.date.available2020-09-29T15:31:59Z
dc.date.issued2020
dc.identifier.urihttp://repositorio.ucm.cl/handle/ucm/3078
dc.description.abstractAn experiment was conducted to evaluate the effect of irrigation cut-off (ICO) strategies on yield components, water productivity (WP), and gas exchange in drip-irrigated hazelnut (Corylus avellana L., cv. Tonda di Giffoni) trees during two consecutive growing seasons. The experimental design was completely randomized, with four ICO treatments and four replicates per treatment based on threshold values of the midday stem water potential (Ψstem). In the T1 treatment, Ψstem was maintained around –0.7 MPa, while T2, T3, and T4 treatments did not receive irrigation from the beginning of stage III (fruit growth curve) until trees reached approximately the following Ψstem thresholds: –1.0 MPa in T2, –1.3 MPa in T3 and –1.6 MPa in T4. Once reached the specific thresholds, irrigation was restored and maintained according to T1 in all treatments until harvest. Besides, measurements of Ψstem, stomatal conductance (gs), net CO2 assimilation rate (An), transpiration rate (E), yield components, α-tocopherol kernel content, and WP were evaluated in this study. Results indicated that values of Ψstem, An, gs, and E observed in T3 and T4 were between 24–29, 15–37, 15–40, and 11–32 % lower than those found in T1, respectively. T4 significantly decreased yield (kg tree–1), kernel (KW), and fruit (FW) weights, but KW/FW ratio and the α-tocopherol kernel content (μg g–1) were not significantly different among treatments. Also, this study indicated that the T2, T3, and T4 treatments had 10, 17, and 25 days without irrigation, which produced water savings of 19, 24, and 29 % in comparison with T1, respectively. Finally, WP was significantly affected by ICO strategies, with the minimum and maximum values observed in T1 (0.51 kg m–3) and T4 (0.86 kg m–3), respectively.es_CL
dc.language.isoenes_CL
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.sourceAgricultural Water Management, 238, 106173es_CL
dc.subjectRegulated deficit irrigationes_CL
dc.subjectPlant-water relationses_CL
dc.subjectWater productivityes_CL
dc.titleEffect of irrigation cut-off strategies on yield, water productivity and gas exchange in a drip-irrigated hazelnut (Corylus avellana L. cv. Tonda di Giffoni) orchard under semiarid conditionses_CL
dc.typeArticlees_CL
dc.ucm.indexacionScopuses_CL
dc.ucm.indexacionIsies_CL
dc.ucm.urisibib2.ucm.cl:2048/login?url=https://www.sciencedirect.com/science/article/abs/pii/S0378377419308157es_CL
dc.ucm.doidoi.org/10.1016/j.agwat.2020.106173es_CL


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