Assessment of sustainable deficit irrigation in a Moroccan apple orchard as a climate change adaptation strategy

Jaouhari, Nabil El; Abouabdillah, Aziz; Bouabid, Rachid; Bourioug, Mohamed; Aleya, Lotfi; Chaoui, Mohamed

doi:10.1016/j.scitotenv.2018.06.108

Cited by 34 publications

(18 citation statements)

References 23 publications

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“…Each irrigation amount was 45 mm (based on the maximum irrigation depth of 100 cm, and the irrigation limit of 60-90% of the field capacity (0.3 cm 3 cm −3 )), while total irrigation amount was 135 mm in 2016 and 225 mm and 2017, which accounted for 61% and 64% of the calculated crop evapotranspiration (ETc), respectively. The ETc was calculated according to the methodology described in El Jaouhari et al (2018) [5]. Each year, the trees were fertilized with 600 kg ha −1 of urea, 150 kg ha −1 of superphosphate and 100 kg ha −1 of potassium sulfate.…”

Section: Study Site and Experimental Designmentioning

confidence: 99%

“…The apple tree is the main income-generating fruit crop that is grown on the Loess Plateau in China [3]. Apple trees consume high levels of water and are frequently subjected to drought stress [4], so are therefore more dependent on irrigation water to ensure both crop yield and quality [5]. Of the different irrigation techniques used, surface irrigation (SI), such as border irrigation, is the most simple and effective conventional method in China [6].…”

Section: Introductionmentioning

confidence: 99%

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Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model

Zheng

Sun

et al. 2018

Water

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The future production of irrigated fruit orchards in the Loess Plateau of China is threatened by a shortage of freshwater. To improve water use efficiency under conditions where irrigation is limited, it is necessary to quantify the root water uptake (RWU) of apple trees. The RWU of apple trees was estimated under surface irrigation using water stable isotope technology and the Hydrus-1D model. Using the Romero-Saltos and IsoSource models, the stable isotopes of water in stems, different soil depths, and different precipitation were analyzed in a 5-year-old dwarfing apple orchard during two seasons 2016 and 2017. Hydrus-1D model was able to simulate the RWU of apple using the maximum coefficient of determination (0.9), providing a root mean square error of 0.019 cm 3 cm −3 and a relative error of 2.25%. The results showed that the main depth of RWU ranged from 0-60 cm during the growth season, with the main contribution occurring in the 0-40 cm depth. These findings indicated that reducing the traditional surface irrigation depth will be important for improving the irrigation water use efficiency.

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Section: Study Site and Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model

Zheng

Sun

et al. 2018

Water

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“…The RDI consists of the reduction of irrigation water to predetermined levels at certain developmental crop stages. Knowing that several climate studies predicted temperature rise and rainfall depletion in arid regions [10], RDI has also been assessed as a climate change adaptation strategy [11][12][13]. However, studies recommend a better monitoring and assessment of RDI impacts on soil salinization and sodification in semi-arid areas [3].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Impact on Root Water Uptake and Solute Return Flow of Different Drip Irrigation Regimes with Brackish Water

Slama

Zemni

Bouksila

et al. 2019

Water

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Water scarcity and quality degradation represent real threats to economic, social, and environmental development of arid and semi-arid regions. Drip irrigation associated to Deficit Irrigation (DI) has been investigated as a water saving technique. Yet its environmental impacts on soil and groundwater need to be gone into in depth especially when using brackish irrigation water. Soil water content and salinity were monitored in a fully drip irrigated potato plot with brackish water (4.45 dSm−1) in semi-arid Tunisia. The HYDRUS-1D model was used to investigate the effects of different irrigation regimes (deficit irrigation (T1R, 70% ETc), full irrigation (T2R, 100% ETc), and farmer’s schedule (T3R, 237% ETc) on root water uptake, root zone salinity, and solute return flows to groundwater. The simulated values of soil water content (θ) and electrical conductivity of soil solution (ECsw) were in good agreement with the observation values, as indicated by mean RMSE values (≤0.008 m3·m−3, and ≤0.28 dSm−1 for soil water content and ECsw respectively). The results of the different simulation treatments showed that relative yield accounted for 54%, 70%, and 85.5% of the potential maximal value when both water and solute stress were considered for deficit, full. and farmer’s irrigation, respectively. Root zone salinity was the lowest and root water uptake was the same with and without solute stress for the treatment corresponding to the farmer’s irrigation schedule (273% ETc). Solute return flows reaching the groundwater were the highest for T3R after two subsequent rainfall seasons. Beyond the water efficiency of DI with brackish water, long term studies need to focus on its impact on soil and groundwater salinization risks under changing climate conditions.

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“…The quality calculated by PCA and GRA was regarded as the quantitative indicator and combined tomato yield of different treatments for evaluation. The weights of fruit quality and yield were given by Equations (10) and (11). The weight of yield was less than the quality in PCA or GRA in terms of the third bunch.…”

Section: Comprehensive Evaluation Of Tomato Yield and Qualitymentioning

confidence: 99%

“…vitamin C (VC), lycopene (L), soluble sugar (SS), total soluble solids (TSS) and fruit shape, and they change with water and environment stress [10] . El Jaouhari et al [11] indicated that the firmness and total soluble solids of apple under deficit irrigation increased significantly compared to control. Conesa et al [12] found that deficit irrigation at harvest would improve fruit quality of watermelon, hot pepper and tomato due to increased total soluble solids and juice proline content.…”

Section: Introductionmentioning

confidence: 99%

Effects of water stress at different growth stages on comprehensive fruit quality and yield in different bunches of tomatoes in greenhouses

Shi¹,

Cao²,

Wang³

et al. 2019

International Journal of Agricultural and Biological Engineering

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The aim of this study was to investigate the effects of tomato quality and yield between different bunches and the differences between the two comprehensive evaluation methods on tomato quality ranking under water stress. Two degrees of water stress including mild water stress (W1) and moderate water stress (W2), and three growth stages that water stress applied including seedling stage (S1), flowering stage (S2) and fruit expanding stage (S3) were tested in this study. The yield and quality of different bunches of tomatoes under water stress during different growth stages were determined as responses, and the comprehensive fruit quality ranking and yield of the second and third bunches were evaluated. The results showed that water stress was important for the improvement of fruit quality, but fruit yield decreased during water stress. The yield of the third tomato bunch decreased from 11.69% (W1S1) to 30.60% (W2S2) compared to control (97.57 t/hm 2), and the effects of mild water stress on fruit yield were minimal at the early growth stage. However, the fruit quality in terms of soluble sugar (SS), total soluble solids (TSS), vitamin C (VC), and firmness (F) improved under water stress compared to control. The combined effects of water stress and its application period significantly affected SS and TSS. Water stress significantly improved the content of SS and TSS in the later growth period compared to seedling and flowering stages. Meanwhile, there was a significant difference in tomato quality between the second and third bunches of fruit, especially in the content of SS, organic acid (OA) and lycopene (L). Principal Component Analysis (PCA) and Grey Relational Analysis (GRA) were used to evaluate comprehensive fruit quality, and the best treatment in terms of the fruit quality was W1S3 for both bunches. The rank-sum ratio (RSR) method was used to evaluate fruit quality and yield, the results showed that W1S3 ranked first based on PCA and W1S1 ranked first based on GRA. Water stress enhanced tomato quality but inevitably reduced its yield during each growth stage. The application of mild water stress during the fruit expanding stage (W1S3) was considered to be the best treatment to provide satisfactory fruit quality and yield based on RSR.

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Assessment of sustainable deficit irrigation in a Moroccan apple orchard as a climate change adaptation strategy

Cited by 34 publications

References 23 publications

Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model

Estimating the Root Water Uptake of Surface-Irrigated Apples Using Water Stable Isotopes and the Hydrus-1D Model

Modelling the Impact on Root Water Uptake and Solute Return Flow of Different Drip Irrigation Regimes with Brackish Water

Effects of water stress at different growth stages on comprehensive fruit quality and yield in different bunches of tomatoes in greenhouses

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