\textcopyright 2016 Elsevier B.V. Partial rootzone drying (PRD) has been reported to potentially improve crop water use efficiency (WUEcrop) compared to full irrigation in different fruit trees; however, field studies on the effect of PRD in citrus are scarce. In this field study, three irrigation strategies were tested in an orchard of mature grapefruit trees during two consecutive seasons (2013/2014 and 2014/2015): drip PRD (two drip lines, alternating irrigation between lines every month), microsprinkler irrigation, and double-line drip irrigation (control). Irrigation was applied during the fruit enlargement stage (April–August). The aims of this field study were: 1) to provide a quantitative comparison of irrigation water productivity among irrigation treatments; and 2) to study their effects on fruit quality, yield, tree growth, and flowering. Drip PRD saved 43 to 47\% of irrigation water compared to control irrigation, and microsprinkler irrigation saved 12 to 18\% of water com
|Journal||Agricultural Water Management|
|State||Published - 2016|
Kusakabe, A., Contreras-Barragan, B. A., Simpson, C., Enciso, J. M., Nelson, S. D., & Melgar, J. C. (2016). Application of partial rootzone drying to improve irrigation water use efficiency in grapefruit trees. Agricultural Water Management, 66-75.