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[1]ZHONG Ronghua,LYU Fayou,BAO Yuhai,et al.Impacts of Several Grasses on Soil Physical Properties in the Riparian Zone of Three Gorges Reservoir[J].Research of Soil and Water Conservation,2018,25(01):17-22.

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Impacts of Several Grasses on Soil Physical Properties in the Riparian Zone of Three Gorges Reservoir

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 17-22 Column: Public date: 2018-02-28

Title:: Impacts of Several Grasses on Soil Physical Properties in the Riparian Zone of Three Gorges Reservoir

Author(s):: ZHONG Ronghua^1,2, LYU Fayou^3,4, BAO Yuhai³, HE Xiubin³; 1. Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China;
2. Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, Yunnan University, Kunming 650091, China;
3. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: soil physical properties; herbaceous plants; riparian zone; Three Gorges Reservoir

CLC:: S152.9

DOI:: -

Abstract:: To understand the impacts of herbaceous plants on soil physical properties, soils in the riparian zone of Three Gorges Reservoir (TGR) with different plant covers (Hemarthria altissima, Hemarthria compressa, Paspalum paspaeoides and Cynodon dactylon) were investigated. With bare area as the control, bulk density (BD), soil particle composition (SPC), soil magnetic susceptibility (SMS) and soil shear strength (SSS) were determined. The results showed that grasses and their roots had significantly influence on soil physical properties. In this investigation, the BD in bare land was significantly higher (p < 0.01) than the grasslands while the SMS of 0—20 cm layer in bare area (mean 1.272×10^-7 m³/kg) was weaker than grasslands (mean 1.765×10^-7 m³/kg). Soil grain size in bare area and grasslands is different but not significant. Plant roots can significantly enhance soil shear strength. The soil cohesion in 0—10 cm and 10—20 cm soil layer of H. altissima land increased by 319.81% and 46.89%, respectively, compare to the bare ground. And the rate of soil cohesion increment in C. dactylon land was 17.69% in 0—10 cm layer and 43.13% in 10—20 cm layer correspondingly. The results will be useful for revegetation and soil conservation in the riparian zone of TGR.

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