Assessment of the viability of using saline reclaimed water in grapefruit in medium to long term
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AuthorRomero Trigueros, Cristina; Nortes Tortosa, Pedro Antonio; Pedrero Salcedo, Francisco; Mounzer, Oussama; Alarcón Cabañero, Juan José; [et al.]
Knowledge AreaProducción Vegetal
SponsorsThis research has been supported by the projects SIRRIMED (KBBE-2009-1-2-3, Proposal No. 245159), SENECA (05665/PI/07 and 11872/PI/09), CONSOLIDER INGENIO 2010 (CSD2006-0067MEC) and CICYT (AGL2010-17553). C. Romero-Trigueros acknowledges the financial support received from CSIC program JAE.
PublisherInstituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria
Bibliographic CitationROMERO TRIGUEROS, Cristina et al. Assessment of the viability of using saline reclaimed water in grapefruit in medium to long term. Spanish Journal of Agricultural Research, 2014, 12(4), pp. 1137-1148. DOI: 10.5424/sjar/2014124-5495.
Gas exchange measurements
Plant water status
Saline reclaimed water
Citrus trees are strongly affected by salinity, especially in countries where irrigation is required as a semi-arid Mediterranean agronomic region. The aims of the study were i) to identify the best reliable plant-based water status indicator for field grown grapefruit trees irrigated with saline reclaimed water during five years of cultivation by measuring seasonal changes in physiological parameters (i.e. gas exchange and stem water potential measurements), leaf structural traits (i.e. leaf chlorophyll content, area-based leaf nitrogen and area-based dry mass), phytotoxic elements and yield; ii) to estimate phytotoxicity thresholds at leaf level. Our results showed that the chlorophyll content was the parameter with the highest number of measures with significant differences (p ≤ 0.05, ANOVA) between trees irrigated with reclaimed water and control trees throughout growing stages. Moreover, Chl a increased linearly with area-based leaf nitrogen (R2 = 0.63; p < 0.001) and ...
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