Evaluating the impact of flood irrigation on spatial variabilities of soil salinity and groundwater quality in an arid irrigated region

Zheng, Nengzhan; Guo, Meiying; Yue, Weifeng; Teng, Yanguo; Zhai, Yuanzheng; Yang, Jie; Zuo, Rui

doi:10.2166/nh.2020.209

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…Nonetheless, the primary purpose of the fall watering season is to soak the soil water salts with greater amounts of diffuse irrigation, which causes more drainage and salt exclusion during this time. This also indicates that the fall watering period has a better effect on soil salt exclusion [50]. The hydrological runoff in the HID mainly consists of surface runoff, soil lateral flow, and groundwater runoff.…”

Section: Characterization Of Water Salinity In the Hidmentioning

confidence: 83%

Water, Salt, and Ion Transport and Its Response to Water-Saving Irrigation in the Hetao Irrigation District Based on the SWAT-Salt Model

Ao,

Jiang,

Bailey

et al. 2024

Agronomy

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Soil salinization is one of the main hazards affecting the sustainable development of agriculture in the Hetao Irrigation District (HID) of Inner Mongolia. To grasp the water and salt transport patterns and spatial–temporal distribution characteristics of the HID at the regional scale, the improved Soil and Water Assessment Tool with a salinity module (SWAT-Salt) model was used to establish the distributed water and salt transport model for the watershed in this study. The results demonstrated that the modified model could more accurately represent the process of water and salt changes in the HID. The coefficient of determination (R2) in the simulation of streamflow and discharge salt loading was 0.83 and 0.86, respectively, and the Nash–Sutcliffe efficiency (NSE) was 0.80 and 0.74, respectively. Based on this, different hydrological processes (surface runoff, lateral flow, groundwater, soil seepage) as well as spatial–temporal distribution characteristics of water salinity in groundwater and soil were analyzed in the HID. Differences in groundwater and soil salinity in different land uses and soil types were also compared. Of these, surface runoff and lateral flow salt discharge loading are concentrated in the southwestern portion of the basin, while groundwater salt discharge loading is concentrated in the eastern as well as southwestern portions of the basin. The salt discharge loading from groundwater accounts for about 98.7% of the total salt discharge loading from all hydrological pathways and is the major contributing part of salt discharge from the irrigation area. Soil salinity increases gradually from west to east. Groundwater salinity (2946 mg/L) and soil water electrical conductivity (0.309 dS/m) were minimized in the cropland. Meanwhile, rational allocation of irrigation water can appropriately increase the amount of salt discharge loading. In conclusion, the model could provide a reference for the investigation of soil salinization and water–salt management measures in irrigation areas.

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Section: Characterization Of Water Salinity In the Hidmentioning

confidence: 83%

Water, Salt, and Ion Transport and Its Response to Water-Saving Irrigation in the Hetao Irrigation District Based on the SWAT-Salt Model

Ao,

Jiang,

Bailey

et al. 2024

Agronomy

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“…Further, drip irrigation also has been adopted in HID, mainly for maize and vegetable crops [12]. Previous studies have primarily focused on examining crop growth [12,30], yield [31][32][33], evapotranspiration [34][35][36], and water use efficiency [37][38][39][40][41] in relation to mulching and irrigation methods. Because the distributions of soil water, salt, and nitrogen are influenced by the mulching and drip irrigation conditions, understanding the dynamics of soil salt and nitrogen under this agronomic practice may help improving the soil water and nitrogen management.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Salt and Nitrogen Distribution under Belt Plastic Film Mulching in Surface- and Drip-Irrigated Maize Field in Hetao Irrigation District

Liu,

Ju,

Shao

et al. 2023

Water

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Hetao Irrigation District (HID) is one of the main regions for maize and sunflower production in North China. However, water resource shortages and soil salinization greatly limit maize and sunflower production. The surface irrigation method is the main irrigation method in HID; however, now, the plastic mulching and drip irrigation area is increasing to reduce irrigation water and enhance crop yield. In this study, the soil water, salt, and nitrogen contents at the 0–100 cm soil layer under plastic mulching and non-mulching conditions with the surface irrigation—fertilizer broadcast practice and drip fertigation method were investigated at the maize elongation and maturation stages in the 2021 and 2022 seasons. The results show that the mulching practice and irrigation methods greatly influenced the soil salt and ionic nitrogen (NO3− and NH4+) distributions and, ultimately, the maize yield. Mulching reduced the soil salt content in the 0–20 cm soil layer by a mean of 35.7% under surface irrigation and by 18.6% under the drip irrigation condition. The NO3− content in the 0–20 cm soil layer with the drip fertigation system was approximately 8 times higher in mulching soil than that out of mulching. However under the surface irrigation condition, the NO3− content was 8–10 times lower under mulching than that out of mulching. The soil salt and NO3− contents were distributed uniformly at each soil layer deeper than a 40 cm depth, indicating minor effects of mulching. The soil NH4+ content decreased as the soil depth increased and distributed uniformly at each soil layer, indicating the insignificant influence of the mulching practice. As a result, the maize yield under the drip-mulching condition was approximately 11% (10.6~11.4%) higher than that under the surface-mulching condition in the two maize seasons. Given that surface irrigation is currently the primary irrigation method in the Hetao Irrigation District (HID), we have proposed three approaches aimed at enhancing maize production through the improvement of nitrogen levels in surface-mulching practices.

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“…Salt stress is a major environmental factor limiting plant distribution, growth, and crop production [1]. Salt accumulation in cultivated land soil mainly comes from irrigation water and seawater containing trace NaCl [2]. Plants absorb high concentrations of salt through their roots, which then causes damage to plants.…”

Section: Introductionmentioning

confidence: 99%

A flavonol synthase (FLS) gene, GhFLS1, was screened out increasing salt resistance in cotton

Han,

Cui,

Cui

et al. 2023

Environ Sci Eur

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Background Flavonols play important roles in antioxidation and anticancer activities, longevity, and cardiovascular protection. Flavonol synthase (FLS) is a key enzyme for flavonol synthesis. Result Phenotypic, transcriptional and metabolic data were analyzed, which showed that there was a close relationship between salt stress and flavonoids, and flavonols were significantly upregulated under salt stress. Nine, seven, four, and four FLS genes were identified in Gossypium hirsutum, Gossypium barbadense, Gossypium arboreum, and Gossypium raimondii, respectively. The results of subcellular localization showed that FLS existed in the nucleus and cytoplasmic. Through phylogenetic analysis, 24 FLS genes were divided into three subfamilies. The results of the RNA sequencing showed that the expression of GhFLS genes was mainly induced by salt, drought, low temperature, and heat stress. GhFLS promoter mainly comprised plant hormone response elements and abiotic stress elements, indicating that the GhFLS gene may play a key role in abiotic stress response. The proline contents of pYL156:GhFLS1 was reduced significantly compared to pYL156 under salt stress, thereby reducing the resistance of cotton to salt stress. Conclusion This study will lay a foundation for further study on the antioxidant regulation mechanism of the FLS gene under abiotic stress.

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Evaluating the impact of flood irrigation on spatial variabilities of soil salinity and groundwater quality in an arid irrigated region

Cited by 11 publications

References 18 publications

Water, Salt, and Ion Transport and Its Response to Water-Saving Irrigation in the Hetao Irrigation District Based on the SWAT-Salt Model

Water, Salt, and Ion Transport and Its Response to Water-Saving Irrigation in the Hetao Irrigation District Based on the SWAT-Salt Model

Investigation of Salt and Nitrogen Distribution under Belt Plastic Film Mulching in Surface- and Drip-Irrigated Maize Field in Hetao Irrigation District

A flavonol synthase (FLS) gene, GhFLS1, was screened out increasing salt resistance in cotton

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