Optimal levels of postharvest deficit irrigation for promoting early flowering and harvest dates in loquat (Eriobotrya japonica Lindl.)

Book Title: NA
Year Published: 2009
Month Published: NA
Author: Cuevas, J. ; Alonso, F. ; Fernández, M.D. ; Hueso, J.J. ; Pinillos, V. ; Cañete, M.L. ; González, M.
Book Group Author: NA

Deficit irrigation after harvest has been proven to be a more profitable strategy for producing loquats due to its effects on promoting earlier flowering and harvest date next season. To determine water savings which most advance flowering and harvest dates, an experiment was established to compare phenology, fruit quality and yield in 'Algerie' loquats over two consecutive seasons. In this experiment some trees were programmed to receive 50%, 25% or 0% of the water applied to controls (RDI₅₀%, RDI₂₅%, and RDI₀%, respectively) from mid-June to the end of July (6 weeks). Fully irrigated trees acted as first controls while trees undergoing previously tested postharvest deficit irrigation (25% of water applied to controls; RDILong) from early June up to the end of August (13 weeks of RDI total) acted as second controls. All deficit irrigation treatments promoted earlier flowering when compared to fully irrigated trees; the greatest advancement in full bloom date (27 days) was achieved with severe short term RDI (RDI₀% and RDI₂₅%). The trees suffering an extended period of water stress advanced full bloom date but to a lesser extent (13 and 18 days; 2004/2005 and 2005/2006, respectively). Earlier bloom derived in an earlier harvest date without detrimental effects on fruit quality and productivity. In this regard, the most severe RDI (RDI₀%) advanced mean harvest date the most (7 and 9 days, depending on the season), and increased the percentage of precocious yield to the highest extent. Productivity was not diminished by reduced irrigation in either season. Fruit size and grading was enhanced thanks to RDI in both seasons. Earliness and better fruit class distribution under RDI also improved fruit value and gross revenue enabling farmers both to increase earning and economize on water.

Pages: 831 - 838
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=agr&AN=IND44176878&site=ehost-live
Volume: 96
Number: 5
Journal: Agricultural water management
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 03783774

flowering, fruit trees, crop yield, water stress, plantstress, phenology, fruit quality, deficit irrigation, Eriobotryajaponica, loquats, optimization, harvest date, postharvest physiology,Spain

Source: EBSCO
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