[1]XU Shaojun,LEI Shutong,ZENG Bo.Stability of Root-Fixed Soil on 4 Different Slopes in the Three Gorges Reservoir Region[J].Research of Soil and Water Conservation,2017,24(02):119-123,131.
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Stability of Root-Fixed Soil on 4 Different Slopes in the Three Gorges Reservoir Region
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 02
Page number:
119-123,131
Column:
Public date:
2017-04-28
- Title:
- Stability of Root-Fixed Soil on 4 Different Slopes in the Three Gorges Reservoir Region
- Keywords:
- soil stability; anti-erodibility; anti-erosion; anti-shearing strength; root length density; soil water content
- CLC:
- S157
- DOI:
- -
- Abstract:
- In this experiment, four slopes with different vegetation covers in the Three Gorges Reservoir banks, slope without vegetation (NS), slope with grass (GS), slope with shrub (SS) and slope with forest (FS), were selected. Anti-erodibility and anti-erosion of 0—15 cm layer, as well as root length density(RLD), root biomass (RB), soil water content (SWC), field capacity (FC), anti-shearing strength(ASS) of every 10 cm soil layer were measured. The results showed that:(1) the enhanced anti-erodibility and anti-erosion value in SS were both significantly higher than those of GS and FS. ASS of the NS increased, the maximum was found at the 10—20 cm layer, and then decreased with the increase of soil depth, while that of the FS increased with the increase of soil depth; (2) the roots of the 3 types of vegetation mainly distributed in 0—30 cm layer, and RLD decreased with the increase of soil depth; the biomass of the GS and the SS changed a little among soil layers, while that of the FS decreased with the increase of soil depth; (3) the SWC of the BS increased significantly with soil depth, while that of the FS was to the contrary; the SWC of the GS and the SS changed slowly with the increase of soil depth; the FC of the SS remained stable among layers, while that of the FS and the GS decreased with the increase of soil depth; the FC of the BS decreased with the increase of soil depth, the maximum occurred at surface layer; (4) the SS had the largest soil stability, and the largest anti-erosion, anti-shearing strength, anti-penetratation strength; a bit of stability was also observed in the GS and the FS, while the worst stability occurred in the NS.
- References:
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