Land Degradation and Development, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 13, 2024

ABSTRACT Vegetation restoration in loess hilly areas effectively controls soil erosion. However, the impact mechanisms of vegetation canopy, litter, and roots on erosion under complex rainfall regimes remain uncertain. The typical sub‐shrub species ( Artemisia sacrorum ) set up four treatments (natural condition, NC; canopy + roots, CR; only, OR; bare soil, BS) 2015–2017. K value clustering analysis was used to classify three regimes: Regime‐I (short duration, small amount medium intensity), Regime‐II (medium high Regime‐III (long large low intensity). results showed that average runoff, loss sediment concentration followed order: BS treatment > OR CR NC treatment. accounted for more than 60% total contribution reduction. litter had lowest relative both runoff reduction (29.76% 4.19%, respectively). Roots most 37.27% reduce just contributed 28.41% loss. Rainfall significantly influenced components control highest different (51.5%–79.9% 65.7%–99.1%, respectively), while contributions occurred (14.4%–47.5%) (6.89%–95.08%), respectively. 180.02% Regime‐II, but it instead minimum 6.81% Regime‐III. reached 91.24% Regime‐III, 37.31% Regime‐II. even negatively or Besides, increase decrease responses increasing I 30 , respectively, only related duration. These findings indicated critical factor controlling erosion, played function, continuous effects. functions plant would change with regimes, which maybe not always beneficial reducing This study provides new insights into rainfall‐vegetation‐erosion relationship.

Language: Английский