Effects of saline reclaimed waters and deficit irrigation on Citrus physiology assessed by UAV remote sensing
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Romero Trigueros, Cristina; Nortes Tortosa, Pedro Antonio; Alarcón Cabañero, Juan José; Hunink, Johannes E.; Parra Gómez, Margarita; [et al.]Sponsors
This study was supported by two CICYT (AGL2010-17553 and AGL2013-49047-C2-482 515 2-R) projects and SIRRIMED (KBBE-2009-1- 2-03, PROPOSAL N◦245159) 483 project. We are also grateful to SENECA–Excelencia Científica (19903/GERM/15) for 484 providing funds for this research.Publication date
2017-03Publisher
Elsevier ScientificBibliographic Citation
ROMERO TRIGUEROS, Cristina et al. Effects of saline reclaimed waters and deficit irrigation on Citrus physiology assessed by UAV remote sensing. Agricultural Water Management, 2017, 183, pp. 60-69. DOI: 10.1016/j.agwat.2016.09.014.Keywords
CitrusCold storage
Crop load
Soluble solid content
Yield
Abstract
The aim of our research was to discover the effects of the long-term irrigation with saline reclaimed (RW) and transfer (TW) water and different irrigation strategies: control (C) and regulated deficit irrigation (RDI) on yield and fruit quality of grapefruit at harvest and during cold storage. TW-RDI treatment decreased tree canopy (TC) and crop load, resulting in a 21% reduction of fruit yield. Regarding fruit quality, RW notably decreased peel thickness at harvest (about 8%); however, this difference was not remained during cold storage. Sugar/acid ratio was mainly increased by RDI, but also by RW, due to an important increase in soluble solid content (11% of average value for TW-RDI, RW-C and RW-RDI). In addition, RDI combined with RW, significantly increased the number of fruits in small category 5 at the end of cold storage. Finally, neither ratio yield/TC nor irrigation water productivity were affected by any irrigation treatments.
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