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[1]ZHANG Xiaomian,ZHANG Jinchi,WANG Yunnan,et al.Research on Soil Shear Strength of the Major Forest Types in Headwaters of Qiantang River[J].Research of Soil and Water Conservation,2015,22(04):79-84,90.

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Research on Soil Shear Strength of the Major Forest Types in Headwaters of Qiantang River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 04 Page number: 79-84,90 Column: Public date: 2015-08-28

Title:: Research on Soil Shear Strength of the Major Forest Types in Headwaters of Qiantang River

Author(s):: ZHANG Xiaomian¹, ZHANG Jinchi², WANG Yunnan³, CHEN Maoqing⁴, YUE Chunlei¹, TIAN Gang⁵, LI Shifeng³; 1. Zhejiang Forestry Academy, Hangzhou 310023, China;
2. Nanjing Forest University, Nanjing 210037, China;
3. Department of Water Resources of Zhejiang Province, Hangzhou 310009, China;
4. Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou 310002, China;
5. Zhejiang-based Guangchuan Engineering Consulting Co., Ltd, Hangzhou 310020, China

Keywords:: soil shear strength; physical and chemical properties; root characteristics; regression model; headwaters of Qiantang River

CLC:: S157.5

DOI:: -

Abstract:: Soil shear strength, physical and chemical properties and root system traits at different soil layers in 6 forest types and two controls (tea plantation and farmland) were determined in the headwaters of Qiantang River, Zhejiang Province. The relative analysis demonstrated that soil organic matter content had evident positive relation with soil shear strength, cohesion and internal friction angle, soil bulk density had significant relation with cohesion, and ratio of powder to viscosity had negative relation with soil shear strength and cohesion. Soil shear strength had evident positive relation with each root system trait (root length, surface area, volume and weight). Cluster analysis on soil shear strength of 8 tested forest types and influencing factors showed that soil shear strength was the highest in Phyllostachys heterocycla cv. pubescens forest and shrub, followed by Pinus massoniana plantation, coniferous and broad-leaved mixed forest, Quercus acutissima forest and Cunninghamia lanceolata forest, and it was the least in tea garden and farmland. The regression models describing the relation between soil shear strength of different forest types and influencing factors were established for different grades of soil shear strength with accuracy of 80%~85%.

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