Water and Salt Regimes Under Irrigation with Brackish/Saline Water in Tunisian Semi-Arid Context

Hachicha, Mohamed; Khaskoussy, Khawla; Abdelgawad, G.

doi:10.1007/978-3-031-24279-3_10

Cited by 1 publication

(2 citation statements)

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“…After the solution was clarified, the electrical conductivity ( EC 1:5 , dS·m −1 ) was measured using a conductivity meter. The measured EC 1:5 value was then converted to the electrical conductivity of a saturated-paste extract ( EC e , dS·m −1 ) using the empirical formula [ 54 ]. The results are shown in Figure 8 .…”

Section: Methodsmentioning

confidence: 99%

“…The irrigation was performed while summer maize entered the six-leaf stage, the ten-leaf stage, and the tasseling stage, forming seven different salt tolerance training modes. As shown in Table 3, the first salt-tolerancetraining (FSTT) started on 21 DAS when summer maize entered the six-leaf stage and ended on 28 DAS; the second salt-tolerance-training (SSTT) started on 35 DAS when summer maize entered the ten-leaf stage and ended on 45 DAS; the severe stress test (SST) started using the empirical formula [54]. The results are shown in Figure 8.…”

Section: Experimental Designmentioning

confidence: 99%

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Effects of Salt Tolerance Training on Multidimensional Root Distribution and Root-Shoot Characteristics of Summer Maize under Brackish Water Irrigation

Peng,

Ma,

et al. 2023

Plants

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To investigate the impact of brackish water irrigation on the multidimensional root distribution and root-shoot characteristics of summer maize under different salt-tolerance-training modes, a micro-plot experiment was conducted from June to October in 2022 at the experimental station in Hohai University, China. Freshwater irrigation was used as the control (CK), and different concentrations of brackish water (S0: 0.08 g·L−1, S1: 2.0 g·L−1, S2: 4.0 g·L−1, S3: 6.0 g·L−1) were irrigated at six-leaf stage, ten-leaf stage, and tasseling stage, constituting different salt tolerance training modes, referred to as S0-2-3, S0-3-3, S1-2-3, S1-3-3, S2-2-3, and S2-3-3. The results showed that although their fine root length density (FRLD) increased, the S0-2-3 and S0-3-3 treatments reduced the limit of root extension in the horizontal direction, causing the roots to be mainly distributed near the plants. This resulted in decreased leaf area and biomass accumulation, ultimately leading to significant yield reduction. Additionally, the S2-2-3 and S2-3-3 treatments stimulated the adaptive mechanism of maize roots, resulting in boosted fine root growth to increase the FRLD and develop into deeper soil layers. However, due to the prolonged exposure to a high level of salinity, their roots below 30 cm depth senesced prematurely, leading to an inhibition in shoot growth and also resulting in yield reduction of 10.99% and 11.75%, compared to CK, respectively. Furthermore, the S1-2-3 and S1-3-3 treatments produced more reasonable distributions of FRLD, which did not boost fine root growth but established fewer weak areas (FLRD < 0.66 cm−3) in their root systems. Moreover, the S1-2-3 treatment contributed to increasing leaf development and biomass accumulation, compared to CK, whereas it allowed for minimizing yield reduction. Therefore, our study proposed the S1-2-3 treatment as the recommended training mode for summer maize while utilizing brackish water resources.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%