Curing the earth: A review of anthropogenic soil salinization and plant-based strategies for sustainable mitigation

Litalien, Amélie; Zeeb, Barbara A.

doi:10.1016/j.scitotenv.2019.134235

Cited by 199 publications

(107 citation statements)

References 87 publications

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“…In the world, 20% of cultivated land and 33% of irrigated land are salt-affected and degraded (Almeida Machado and Serralheiro 2017), which affect the availability and supply of soil nutrients to crops, resulting in a reduction of both yield and quality, and it has been one of the most important factors contributing to crop losses worldwide (Litalien and Zeeb 2020). In order to increase production, more chemical fertilizers are applied to soil, but due to inappropriate application of mineral nutrients, soil degradation, including acidification, secondary salinization, nutrient imbalance, and an abnormal accumulation of nitrogen (N), phosphorus (P), and potassium (K), is common in soils (Cai 2019), with secondary salinization being the most prominent of these phenomena (Yu et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of Foliar Fertilization: a Review of Current Status and Future Perspectives

Niu

Liu

Huang

et al. 2020

J Soil Sci Plant Nutr

133

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The use of large amounts of chemical fertilizers promotes high-yield agriculture, but is also associated with a number of problems, such as low fertilizer utilization rates, soil acidification, and soil salinization. Comprehensive studies have shown that spraying chelated fertilizer on leaves can reduce the total amounts of fertilizer applied and achieve high fertilizer efficiency. Foliar fertilizer application after soil fertilization is an effective method to increase the contents of trace elements in crops and crop yield, and to improve the soil environment. However, the application of inorganic foliar fertilizer results in difficulties in nutrient absorption and migration in plants. Chelated foliar fertilizers are effective for improving element utilization efficiency, crop yield, and quality. The physicochemical properties, molecular structure, chelating strength, and chelating rate of chelating agents modulate the effects of application of nutrients. This study reviews and discusses the effects and problems associated with sugar alcohol-containing chelated fertilizers and foliar fertilizers.

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Section: Introductionmentioning

confidence: 99%

Effects of Foliar Fertilization: a Review of Current Status and Future Perspectives

Niu

Liu

Huang

et al. 2020

J Soil Sci Plant Nutr

133

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“…With the autotrophic sessile nature of plants, they are continually challenged by various biotic and abiotic stresses during their growth and development stages. To defend themselves against unfavorable environmental conditions, plants have developed various complex regulation strategies, including enzymatic and non-enzymatic systems [4,5]. The enzymatic system consists of a series of antioxidant enzymes, such as catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR), which play major roles in reactive oxygen species (ROS) scavenging [6].…”

Section: Introductionmentioning

confidence: 99%

Melatonin Application Improves Salt Tolerance of Alfalfa (Medicago sativa L.) by Enhancing Antioxidant Capacity

Cen

Wang

Liu

et al. 2020

Plants

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Alfalfa (Medicago sativa L.) is an important and widely cultivated forage grass. The productivity and forage quality of alfalfa are severely affected by salt stress. Melatonin is a bioactive molecule with versatile physiological functions and plays important roles in response to various biotic and abiotic stresses. Melatonin has been proven efficient in improving alfalfa drought and waterlogging tolerance in recent studies. In our reports, we applied melatonin exogenously to explore the effects of melatonin on alfalfa growth and salt resistance. The results demonstrated that melatonin application promoted alfalfa seed germination and seedling growth, and reduced oxidative damage under salt stress. Further application research found that melatonin alleviated salt injury in alfalfa plants under salt stress. The electrolyte leakage, malondialdehyde (MDA) content and H 2 O 2 content were significantly reduced, and the activities of catalase (CAT), peroxidase (POD), and Cu/Zn superoxide dismutase (Cu/Zn-SOD) were increased with melatonin pretreatment compared to control plants under salt stress with the upregulation of genes related to melatonin and antioxidant enzymes biosynthesis. Melatonin was also involved in reducing Na + accumulation in alfalfa plants. Our study indicates that melatonin plays a primary role as an antioxidant in scavenging H 2 O 2 and enhancing activities of antioxidant enzymes to improve the salt tolerance of alfalfa plants.Plants 2020, 9, 220 2 of 17 world's irrigated land affected by saline or sodic globally [7,8]. Salinity has become one of the most important environmental stress factors impairing worldwide agricultural productivity. Under salinity conditions, the seed germination, growth and development processes of alfalfa are inhibited and they finally impair the herbage yield, as well as the forage quality [9]. Breeding new alfalfa cultivars with high salt tolerance is always needed. Genetic engineering and conventional breeding have been proven efficient for improving salt tolerance of various plant species [10][11][12][13]. However, they are time-consuming and complicated. Exogenous application of certain plant growth regulators such as phytohormone and other small molecules has been proven efficient at overcoming the harmful effects of salt stress on plants [14][15][16][17]. Moreover, plant growth regulators in low concentrations always play a role in plants, and are cost-effective. Foliar spraying of salicylic acid (SA) on faba bean inhibits Na + accumulation and lipid peroxidation, improving the antioxidant resistance and finally mitigating the damage caused by salinity [18]. Exogenously applied poly-γ-glutamic acid on wheat maintains the Na + and K + homeostasis and enhances antioxidant capacity by alleviating salinity damage under salt stress conditions [19]. Exogenous spermidine application to salt-stressed cucumber improves the photosynthetic capacity and the activity of key enzymes for CO 2 fixation by regulating the expression of related genes, and tolerance to salinity is thus...

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“…The bearing capacity of composite foundation related to the cushion, which adjusts the pile-soil stress ratio to distribute the load reasonably between the pile and the soil between piles [20]. Meanwhile, the secondary salinization mainly arises from the interaction and migration of water, heat and salt as well as the rise and migration of capillary water vapor in saline soil [21][22][23][24][25][26]. This phenomenon can be curbed by controlling the water and salt migration with partitions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Lai¹,

Lei²,

Ji³

et al. 2020

RCMA

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This paper puts forward a novel approach called cement-modified soil (CMS) blocking cushion technology to reinforce the subgrade in saline soil region: the cushion layer of composite foundation and a roadbed partition layer are combined into one CMS layer. The effectiveness of the proposed approach was verified through outdoor experiments on the saline soil section (DK821+600-DK821+900) of the newly built Lanxin High-Speed Railway. The experimental results show that the CMS layer can effectively adjusts the pile-soil stress ratio of the composite foundation, thereby enhancing the bearing capacity of the composite foundation and reducing the total settlement of the subgrade; it is also verified that the CMS layer greatly suppresses the upward migration of capillary water and water vapor in the foundation soil, and curbs the migration of salt, preventing the secondary salinization of the railway subgrade. Overall, this research provides a simple and low-cost subgrade reinforcement technique for saline soil regions, shedding new light on the engineering application of the CMS.

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Curing the earth: A review of anthropogenic soil salinization and plant-based strategies for sustainable mitigation

Cited by 199 publications

References 87 publications

Effects of Foliar Fertilization: a Review of Current Status and Future Perspectives

Effects of Foliar Fertilization: a Review of Current Status and Future Perspectives

Melatonin Application Improves Salt Tolerance of Alfalfa (Medicago sativa L.) by Enhancing Antioxidant Capacity

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

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