Abstract

PAYAN-OCHOA, Sergio et al. Irrigation scheduling in 'Perlette' and 'Sugraone' table grapes (Vitis vinifera L.) using moisture sensors. Rev. Chapingo Ser.Hortic [online]. 2013, vol.19, n.2, pp.163-172. ISSN 2007-4034.  https://doi.org/10.5154/r.rchsh.2012.04.024.

Limited water availability requires greater effort to maximize its efficient use. One way of doing this is through proper irrigation scheduling. This study was carried out in a vineyard in the Hermosillo Coast region, Sonora, Mexico, in order to assess the effect of reducing the annual irrigation depth on the yield and quality of 'Sugraone' and 'Perlette' grapevine cultivars. We evaluated restricted irrigation with 70 % ETc, modified irrigation with 100 % ETc with drippers spaced 50 cm apart, and a control with drippers spaced 75 cm apart and 100 % ETc, by monitoring soil moisture at 40 and 80 cm deep. Fruit number and weight, plant yield, grape diameter and soluble solids were measured. Results show that in 'Perlette' and 'Sugraone' yield and quality are maintained by restricting irrigation during non-critical plant stages, but maintaining tensions of 25-50 cb until harvest and 100-200 cb in postharvest. In Tukey's range test (P ≤ 0.05), 'Perlette' responded better to modified irrigation, surpassing restricted irrigation in 2008 by 28.7 %. By contrast, 'Sugraone' had a better response with restricted irrigation, as it surpassed the control in number of clusters and plant yield with 42.5 and 40.7 %, respectively. In grape diameter, it surpassed the control and modified irrigation by 3.6 and 3.5 %, respectively, and increased soluble solids by 7.6 % with respect to modified irrigation.

Keywords : Drip irrigation; evapotranspiration; moisture monitoring.

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