Global mapping of soil salinity change

Ivushkin, Konstantin; Bartholomeus, Harm; Bregt, A.K.; Pulatov, Alim; Kempen, B.; Sousa, Luís Moreira de

doi:10.1016/j.rse.2019.111260

Cited by 301 publications

(163 citation statements)

References 28 publications

(42 reference statements)

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“…On the contrary, the average precision of feature space model that contained MSAVI was the worst with R 2 = 0.80. This above conclusions were consistent with the studies of Ivushkin et al [3] and Guo and Wen [7]. The reason was that the salinity would precipitate out of the surface soil, which apparently affected the surface albedo [2], [34], [32]- [36].…”

Section: Resultssupporting

confidence: 91%

“…Scudiero et al [23] applied the linear modeling of remote sensing vegetation indices to explore the potentials of assessing soil salinity. Ivushkin et al [3] produced a global soil salinity map by combining thermal infrared images, soil texture data and field observations with machine learning method. Wang et al [24] conducted the detailed comparison in monitoring salinization between Sentinel-2 MSI and Landsat 8 image and found that MSI image performed better than Landsat 8 image.…”

Section: Introductionmentioning

confidence: 99%

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Soil Salizanation Information in the Yellow River Delta Based on Feature Surface Models Using Landsat 8 OLI Data

2020

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Soil salinization as one of the major eco-environmental problems, has greatly restricted the regional development of Yellow River Delta. In this paper, five parameters that derived from Landsat images, including MSAVI, Albedo, SI, I Fe2O3 , and WI have been utilized to establish ten feature spaces, and four categories of salinization detection model have been proposed. After analysis and comparison of inversion accuracy, the three typical surface parameters, including SI (R 2 = 0.85), I Fe2O3 (R 2 = 0.83), and WI (R 2 = 0.83) are better indices to retrieve the salinization information and the WI-SI point to line (soil line) model(R 2 = 0.88), the Albedo-SI point to line (wet line) model(R 2 = 0.87) and the Albedo-I Fe2O3 point to point model(R 2 = 0.86) have better applicability to monitor the salinization condition in the Yellow River Delta. The research results can provide technical method reference for salinization monitoring of other regions.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Soil Salizanation Information in the Yellow River Delta Based on Feature Surface Models Using Landsat 8 OLI Data

2020

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“…Soil salinization is recognized as one of the most serious threats to agricultural production [ 1 ], affecting more than one billion hectares worldwide [ 2 ]. Increased salinization is expected to affect 50% of arable land by the year 2050 [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Trichoderma Enhances Net Photosynthesis, Water Use Efficiency, and Growth of Wheat (Triticum aestivum L.) under Salt Stress

et al. 2020

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Soil salinity is one of the most important abiotic stresses limiting plant growth and productivity. The breeding of salt-tolerant wheat cultivars has substantially relieved the adverse effects of salt stress. Complementing these cultivars with growth-promoting microbes has the potential to stimulate and further enhance their salt tolerance. In this study, two fungal isolates, Th4 and Th6, and one bacterial isolate, C7, were isolated. The phylogenetic analyses suggested that these isolates were closely related to Trichoderma yunnanense, Trichoderma afroharzianum, and Bacillus licheniformis, respectively. These isolates produced indole-3-acetic acid (IAA) under salt stress (200 mM). The abilities of these isolates to enhance salt tolerance were investigated by seed coatings on salt-sensitive and salt-tolerant wheat cultivars. Salt stress (S), cultivar (C), and microbial treatment (M) significantly affected water use efficiency. The interaction effect of M x S significantly correlated with all photosynthetic parameters investigated. Treatments with Trichoderma isolates enhanced net photosynthesis, water use efficiency and biomass production. Principal component analysis revealed that the influences of microbial isolates on the photosynthetic parameters of the different wheat cultivars differed substantially. This study illustrated that Trichoderma isolates enhance the growth of wheat under salt stress and demonstrated the potential of using these isolates as plant biostimulants.

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“…The rise in salt-affected soils could be due to an excess of soluble salts known as saline soils, while the supremacy of exchangeable sodium (Na + ) in soil is termed as sodic soils, or a mixture of both situations is called saline-sodic soils [ 2 ]. According to an estimate, the increase in the total area of salt-affected land from 1986 to 2016 was around 1 billion hectares [ 3 ]; that might be due to low rainfall, high evapotranspiration, defective drainage, and/or the successive application of fertilizers, soil amendments, and irrigation water having high salt contents [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Coating of Urea with Bacillus-Augmented Zinc Oxide on Wheat Grown under Salinity Stress

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Hussain

et al. 2020

Plants

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Zinc (Zn) availability is limited in salt-affected soils due to high soil pH and calcium concentrations causing Zn fixation. The application of synthetic Zn fertilizer is usually discouraged due to the high cost and low Zn use efficiency. However, salt-tolerant Zn-solubilizing bacteria (ZSB) are capable of solubilizing fixed fractions of Zn and improving fertilizer use efficiency. In the current study, a product was formulated by coating urea with bioaugmented zinc oxide (ZnO) to improve wheat productivity under a saline environment. The promising ZSB strain Bacillus sp. AZ6 was used for bioaugmentation on ZnO powder and termed as Bacillus sp. AZ6-augmented ZnO (BAZ). The experiment was conducted in pots by applying urea granules after coating with BAZ, to evaluate its effects on wheat physiology, antioxidant activity, and productivity under saline (100 mM NaCl) and non-saline (0 mM NaCl) conditions. The results revealed that the application of BAZ-coated urea alleviated salt stress through improving the seed germination, plant height, root length, photosynthetic rate, transpiration rate, stomatal conductance, soil plant analysis development (SPAD) value, number of tillers and grains, spike length, spike weight, 1000-grain weight, antioxidant activity (APX, GPX, GST, GR, CAT, and SOD), and NPK contents in the straw and grains of the wheat plants. Moreover, it also enhanced the Zn contents in the shoots and grains of wheat by up to 29.1 and 16.5%, respectively, over absolute control, under saline conditions. The relationships and variation among all the studied morpho-physio and biochemical attributes of wheat were also studied by principal component (PC) and correlation analysis. Hence, the application of such potential products may enhance nutrient availability and Zn uptake in wheat under salt stress. Therefore, the current study suggests the application of BAZ-coated urea for enhancing wheat’s physiology, antioxidant system, nutrient efficiency, and productivity effectively and economically.

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Global mapping of soil salinity change

Cited by 301 publications

References 28 publications

Soil Salizanation Information in the Yellow River Delta Based on Feature Surface Models Using Landsat 8 OLI Data

Soil Salizanation Information in the Yellow River Delta Based on Feature Surface Models Using Landsat 8 OLI Data

Trichoderma Enhances Net Photosynthesis, Water Use Efficiency, and Growth of Wheat (Triticum aestivum L.) under Salt Stress

Impact of Coating of Urea with Bacillus-Augmented Zinc Oxide on Wheat Grown under Salinity Stress

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