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- W4309915133 abstract "Soil water repellency (SWR) is frequently observed in different types of land use and climates. Since SWR potentially enhances the difficulty of water infiltration in soil, the phenomenon can severely impact the water use of plants in arid regions. Therefore, understanding the origin of SWR is crucial in arid and semi-arid regions. This study investigated the fundamental and hydrological properties of soils in three arid ecosystems (desert, farmland, and forest). Analysis was done to determine any potential links between these properties, vegetation cover, and the severity of SWR. It was found that SWR was positively correlated with soil organic carbon (SOC), silt content, and field capacity of soil, where the SWR was in subcritical SWR range. The linear correlation and hierarchical clustering analysis confirmed that the SOC and silt content was the critical factor affecting the occurrence and persistence of SWR. The major source of organic carbon and nutrients to the soil was vegetation, which also had an impact on the distribution of soil carbon. The most striking observation was that the silt content was strongly correlated with both field capacity ( r = 0.817, p = 0.001) and SWR ( r = 0.710, p = 0.010), which can be attributed to the SOC on silt. In arid and semi-arid regions, the specific surface area of silt was relatively larger than that of sand. Meanwhile, compared to the clay in soil, the proportion of silt was much higher. The results imply that silt could significantly affect the soil hydrological properties and that silt content could serve as a new proxy for predicting water repellency in arid and semi-arid regions." @default.
- W4309915133 created "2022-11-30" @default.
- W4309915133 creator A5016038041 @default.
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- W4309915133 creator A5088423634 @default.
- W4309915133 date "2022-11-24" @default.
- W4309915133 modified "2023-10-14" @default.
- W4309915133 title "Organic carbon and silt determining subcritical water repellency and field capacity of soils in arid and semi-arid region" @default.
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- W4309915133 doi "https://doi.org/10.3389/fenvs.2022.1031237" @default.
- W4309915133 hasPublicationYear "2022" @default.
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