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Water 2018, 10(5), 583; https://doi.org/10.3390/w10050583

Effect of Alternative Irrigation Strategies on Yield and Quality of Fiesta Raisin Grapes Grown in California

1
Visiting Scientist, Irrigation Dpt., CEBAS-CSIC, P.O. Box 164, 30100 Murcia, Spain
2
Research Agricultural Engineer, USDA Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, Parlier, CA 93648-9757, USA
*
Author to whom correspondence should be addressed.
Received: 14 March 2018 / Revised: 23 April 2018 / Accepted: 25 April 2018 / Published: 30 April 2018
(This article belongs to the Special Issue Innovation Issues in Water, Agriculture and Food)
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Abstract

Traditionally, grapes are fully irrigated, but alternative irrigation strategies to reduce applied irrigation water may be necessary in the future as occurrences of drought increase. This study was conducted in the San Joaquin Valley (SJV) of California from 2012 to 2014. Three irrigation treatments were used to study the effects on the yield and quality of Fiesta grapes. The treatments included: grower irrigation (GI) weekly irrigation lasting for approximately 65 h; sustained deficit (SD) equal to 80% of the GI treatment; and regulated deficit (RD) equal to 50% of the GI until fruit set when it was increased to 80% of the GI through harvest and reduced to 50% of the GI after harvest. Average water use across treatments was ≈489 mm. Average yield across all treatments was 7.9 t ha−1, 9.1 t ha−1 and 11.8 t ha−1 in 2012, 2013, and 2014, respectively. Yield was sustained in SD and RD, with up to a 20% reduction in applied water use compared to GI. There were no differences in raisin quality and grade among any of the treatments in any year. The percentage of substandard grapes decreased from an average of 12.6% in 2012 to 3.6% in 2013 and 2014. Growers may use a sustained deficit approach during periods of limited water availability to minimize the effect on yield. View Full-Text
Keywords: deficit irrigation; Fiesta grapes; drip irrigation; dried on the vine; sustained deficit irrigation; regulated deficit irrigation deficit irrigation; Fiesta grapes; drip irrigation; dried on the vine; sustained deficit irrigation; regulated deficit irrigation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Abrisqueta, I.; Ayars, J.E. Effect of Alternative Irrigation Strategies on Yield and Quality of Fiesta Raisin Grapes Grown in California. Water 2018, 10, 583.

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