Water use indicators and economic analysis for on-farm irrigation decision: A case study of a super high density olive tree orchard

Fernández, J.E.; Alcón, Francisco; Díaz-Espejo, Antonio; Hernández‐Santana, Virginia; Cuevas, M.V.

doi:10.1016/j.agwat.2020.106074

Cited by 331 publications

(130 citation statements)

References 88 publications

(136 reference statements)

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“…A portable fluorometer (Handy PEA, Hansatech Ltd., Kings Lynn, UK) was used to assess chlorophyll ‘ a ’ fluorescence. The equation F v / F m = ( F m − F 0 ) ÷ F m [ 41 ] was practiced to calculate the PSII maximum quantum yield. Based on the equal absorption, the equation included in [ 42 ] was also practiced to calculate the index of photosynthetic performance (PIABS).…”

Section: Methodsmentioning

confidence: 99%

Foliar Application of Zinc Oxide Nanoparticles Promotes Drought Stress Tolerance in Eggplant (Solanum melongena L.)

Semida

Abdelkhalik

Mohamed

et al. 2021

Plants

211

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Water shortage and salinity are major challenges for sustaining global food security. Using nutrients in the nano-scale formulation including zinc oxide nanoparticles (ZnO NP) is a novel fertilization strategy for crops. In this study, two field-based trials were conducted during 2018 and 2019 to examine the influence of three ZnO NP concentrations (0, 50, and 100 ppm) in eggplant grown under full irrigation (100 of crop evapotranspiration; ETc) and drought stress (60% of ETc). Plant growth, yield, water productivity (WP), physiology, biochemistry, and anatomy responses were evaluated. Drought stress significantly decreased membrane stability index (MSI), relative water content (RWC), and photosynthetic efficiency, thus hampered eggplant growth and yield. In contrast, exogenous ZnO NP to water-stressed eggplant resulted in increased RWC and MSI associated with improved stem and leaf anatomical structures and enhanced photosynthetic efficiency. Under drought stress, supplementation of 50 and 100 ppm ZnO NP improved growth characteristics and increased fruit yield by 12.2% and 22.6%, respectively, compared with fully irrigated plants and nonapplied ZnO NP. The highest water productivity (WP) was obtained when eggplant was irrigated with 60% ETc and foliarly treated with 50 or 100 ppm of ZnO NP, which led to 50.8–66.1% increases in WP when compared with nontreated fully irrigated plants. Collectively, these findings demonstrated that foliar spraying ZnO NP gives the utility for alleviating drought stress effects on eggplant cultivated in saline soil.

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Section: Methodsmentioning

confidence: 99%

Foliar Application of Zinc Oxide Nanoparticles Promotes Drought Stress Tolerance in Eggplant (Solanum melongena L.)

Semida

Abdelkhalik

Mohamed

et al. 2021

Plants

211

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“…CWP g and CWP b were calculated as the grain yield (kg m −3 ) or biological yield (kg ha −1 ) ratio to crop evapotranspiration (ET, mm), [ 56 , 57 , 58 ], which was calculated following the equation of water balance [ 59 ]: CWP (kg m −3 ) = Yield ÷ (ET × 10) ET = IW + P + Cr + Dp ± Rf ± ∆S IW = amount of irrigation water (mm), P = annual precipitation (rainfall; mm), Cr = capillary rise to plant root zone (mm), Dp = deep percolation (mm), Rf = surface runoff (mm), and ∆S = soil moisture change in the plant root zone (mm). When the groundwater table was 20 m below the ground surface, Cr was taken as zero.…”

Section: Methodsmentioning

confidence: 99%

“…CWPg and CWPb were calculated as the grain yield (kg m −3 ) or biological yield (kg ha −1 ) ratio to crop evapotranspiration (ET, mm), [56][57][58], which was calculated following the equation of water balance [59]:…”

Section: Water Productivity Of Maize Grain Yield (Cwpg) and Biologicamentioning

confidence: 99%

Exogenously Used 24-Epibrassinolide Promotes Drought Tolerance in Maize Hybrids by Improving Plant and Water Productivity in an Arid Environment

Desoky

Mansour

Ali

et al. 2021

Plants

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The influence of 24-epibrassinolide (EBR24), applied to leaves at a concentration of 5 μM, on plant physio-biochemistry and its reflection on crop water productivity (CWP) and other agronomic traits of six maize hybrids was field-evaluated under semi-arid conditions. Two levels of irrigation water deficiency (IWD) (moderate and severe droughts; 6000 and 3000 m3 water ha–1, respectively) were applied versus a control (well-watering; 9000 m3 water ha–1). IWD reduced the relative water content, membrane stability index, photosynthetic efficiency, stomatal conductance, and rates of transpiration and net photosynthesis. Conversely, antioxidant enzyme activities and osmolyte contents were significantly increased as a result of the increased malondialdehyde content and electrolyte leakage compared to the control. These negative influences of IWD led to a reduction in CWP and grain yield-related traits. However, EBR24 detoxified the IWD stress effects and enhanced all the above-mentioned parameters. The evaluated hybrids varied in drought tolerance; Giza-168 was the best under moderate drought, while Fine-276 was the best under severe drought. Under IWD, certain physiological traits exhibited a highly positive association with yield and yield-contributing traits or CWP. Thus, exogenously using EBR24 for these hybrids could be an effective approach to improve plant and water productivity under reduced available water in semi-arid environments.

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“…Where Y is yield of marketable product and I is seasonal irrigation volume. WP I ( Fernández et al., 2020 ) stands for the kilograms of marketable peaches produced per unit of irrigation water (m 3 ) supplied to the orchard.…”

Section: Methodsmentioning

confidence: 99%

Innovative Soil Management and Micro-Climate Modulation for Saving Water in Peach Orchards

et al. 2020

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Microclimatic and soil management studies emphasize that roofing above the canopy or soil mulching contributes to reduce water losses from horticultural cropping systems and, at the same time, to increase water use efficiency. The aim of this 2-year on-farm study, carried out on a late ripening peach (cv. California) orchard, was to investigate the combined effect of water supply (full or deficit irrigation, DI), incoming light (hail or shading net), and soil management (tilling or mulching) on: microclimate; fruit growth; yield; irrigation water use productivity (WP I); and soil water stress coefficient (Ks). Shading hail net reduced air temperature (−1°C), wind speed (−57%), solar radiation (−32%), while increased relative air humidity (+9.5%). Compared to the control treatment (hail net coverage, soil tillage, and full irrigation), the innovative management (DI + shading hail net + mulching) reduced seasonal volumes of irrigation water (−25%) and increased both final yield (+36%) and WP I (+53%). Saving water resources without losing yield is an achievable goal by peach orchards growing under the Mediterranean climate if the DI agro-technique is adopted conjointly with shading hail net and soil mulching.

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Water use indicators and economic analysis for on-farm irrigation decision: A case study of a super high density olive tree orchard

Cited by 331 publications

References 88 publications

Foliar Application of Zinc Oxide Nanoparticles Promotes Drought Stress Tolerance in Eggplant (Solanum melongena L.)

Foliar Application of Zinc Oxide Nanoparticles Promotes Drought Stress Tolerance in Eggplant (Solanum melongena L.)

Exogenously Used 24-Epibrassinolide Promotes Drought Tolerance in Maize Hybrids by Improving Plant and Water Productivity in an Arid Environment

Innovative Soil Management and Micro-Climate Modulation for Saving Water in Peach Orchards

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