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- W4293550233 endingPage "106588" @default.
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- W4293550233 abstract "• Up-slope runoff and sediment increased most nutrient contents on the wide slope. • Up-slope runoff and sediment decreased most nutrient contents on the narrow slope. • Up-slope runoff and sediment reduced random spatial heterogeneity of soil nutrients. Upslope runoff and sediment critically influence soil erosion, while their impact on the subsequent downslope nutrient distribution has not been examined, consequently hindering the exact assessment of the effects of erosion on soil biogeochemical cycles. Herein we selected two groups of wide and narrow slopes on the middle Loess Plateau, with each slope group including slopes with and without upslope runoff and sediment. For each slope, we collected soil samples from topsoil along the slope at different distances from the upper slope to the lower slope, and collected samples from depths of 0–60 cm at the upper, middle and lower positions of the slope. The contents of soil organic matter and nutrients were analysed. The purpose of this study was to disentangle the effects of upslope runoff and sediment on spatial distribution of soil nutrients on slopes of different widths. We showed that compared with slopes without upslope runoff and sediment, upslope runoff and sediment increased the content of most nutrients in topsoil on the wide slope, but had a contrasting effect on the narrow slope. Upslope runoff and sediment reduced the random spatial heterogeneity of soil nutrients on both the wide and narrow slopes, with greater effects observed on the narrow slope. The influence of upslope runoff and sediment on the profile distribution of soil nutrients varied with slope position and slope width, and was nutrient type-dependent. These results indicated that slope topographical conditions interact with upslope runoff and sediment in influencing vertical and horizontal patterns of soil nutrients on slopes." @default.
- W4293550233 created "2022-08-30" @default.
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- W4293550233 date "2022-12-01" @default.
- W4293550233 modified "2023-10-16" @default.
- W4293550233 title "Disentangling effects of upslope runoff and sediment on soil nutrients on the hilly slopes of the Loess Plateau, China" @default.
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- W4293550233 doi "https://doi.org/10.1016/j.catena.2022.106588" @default.
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