Performance of direct root-zone deficit irrigation on Vitis vinifera L. cv. Cabernet Sauvignon production and water use efficiency in semi-arid southcentral Washington

Ma, Xiaochi; Sanguinet, Karen A.; Jacoby, Pete W.

doi:10.1016/j.agwat.2019.04.023

Cited by 28 publications

(14 citation statements)

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“…While there has been a positive shift from less sustainable methods of irrigation such as spray or furrow irrigation to more sustainable drip irrigation methods, improvements are still needed to enhance water productivity ( Ayars et al, 2015 ). Direct root-zone irrigation (DRZ) was introduced recently as an efficient subsurface drip irrigation strategy to improve water use efficiency and sustain grape production in semi-arid regions ( Ma et al, 2019 ). This study further advanced our knowledge of the novel irrigation strategy by investigating the eco-physiological responses of Cabernet Sauvignon grapevines to the DRZ and found improved leaf gas exchange with deep root development compared to the traditional surface drip irrigation (SD).…”

Section: Discussionmentioning

confidence: 99%

“…Phenological stages of grapevines for all treatments were recorded based on the Biologische Bundesanstalt, Bundessortenamt und CHemische Industrie (BBCH) scale for bud break (stage 09), flowering (stage 65), fruit set (stage 71), veraison (stage 81) and harvest (stage 89) ( Lorenz et al, 1995 ). To map the development of vines over the course of the study, all dates of phenological stage were reported as the average of all treatments ( Pisciotta et al, 2018 ; Ma et al, 2019 ).…”

Section: Methodsmentioning

confidence: 99%

“…Image Analysis Software version 1.3.2.25 (CID Bio-Science, Camas, WA, USA). Details in operation of the root imager and root image analysis were described by Ma et al (2019) .…”

Section: Methodsmentioning

confidence: 99%

“…Direct root-zone irrigation (DRZ) is a novel subsurface micro-irrigation system which was initially tested in vineyards and showed promise for improving WUE c and sustaining grape yield and quality in a semi-arid climate ( Jacoby and Ma, 2018 ). Compared to traditional irrigation systems, DRZ flexibly adjusts the installation position and water delivery depth, concurrently providing easier access for belowground system maintenance ( Ma et al, 2019 ). In a scenario of climatic change, grapevines have a high demand for supplemental irrigation especially in areas with seasonal drought ( Bonada et al, 2015 ; Bernardo et al, 2018 ; Douthe et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

“…We previously found that DRZ irrigation rate and not delivery depth was crucial to maintain grapevine water status and mitigate stress ( Ma et al, 2019 ). In addition, we found that DRZ increased grape yields by 9–12% compared to traditional surface drip irrigation (SD) and that grapevine rooting was decreased in the top 60 cm soil profile suggesting that DRZ promoted deeper root growth ( Ma et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

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Improving Net Photosynthetic Rate and Rooting Depth of Grapevines Through a Novel Irrigation Strategy in a Semi-Arid Climate

Jacoby

Sanguinet

2020

Front. Plant Sci.

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Direct root-zone irrigation (DRZ) is a novel subsurface irrigation strategy initially tested in vineyards for economizing water and securing grape production in arid regions with unstable climatic patterns. However, studies are lacking on the responses of grapevine leaf carbon assimilation and deep rooting patterns to the novel irrigation strategy, which are essential for optimizing grapevine growth and alleviating extreme water stress during periods of heat and drought. Thus, a two-year field study was conducted in a commercial vineyard of Cabernet Sauvignon (Vitis vinifera L.) under a semi-arid climate in Washington, USA to compare the differences in leaf gas exchange and root distribution along the 0-160 cm soil profile, combined with measurements of specific leaf area and total carbon and nitrogen content in leaves and shoots to compare DRZ and traditional surface drip irrigation (SD) under three watering regimes. Compared to SD, significantly higher rates of net CO 2 assimilation, stomatal conductance and transpiration in leaves, which positively correlated to midday stem water potential, were found in grapevines irrigated through DRZ in both years. Meanwhile, DRZ reduced total root number by 50-60% and root length density (RLD) by 30-40% in the upper 60 cm soil at high (0.75-0.80 crop evapotranspiration) and moderate (0.60-0.65 crop evapotranspiration) irrigation rates, but no significant differences were found at low (0.45-0.50 crop evapotranspiration) irrigation rate between DRZ and SD. Higher root number and RLD were detected under DRZ within 60-160 cm soil depths, accompanied by a decreased ratio of total carbon to nitrogen content in leaves with slightly increased specific leaf area. Decreased rainfall and increased temperature in 2018 possibly amplified the positive effects of DRZ. Our study indicates that grapevines under DRZ could develop deeper roots for water uptake, which helps ameliorate water stress and improve the photosynthetic rate as well as enhance grapevine adaptation to semi-arid climates.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Image Analysis Software version 1.3.2.25 (CID Bio-Science, Camas, WA, USA). Details in operation of the root imager and root image analysis were described by Ma et al (2019) .…”

Section: Methodsmentioning

confidence: 99%