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[1]ZHONG Ronghua,BAO Yuhai,HE Xiubin,et al.Root Distributions of Several Grasslands and Soil Nutrient Variation in the Riparian Zone of Three Gorges Reservoir[J].Research of Soil and Water Conservation,2015,22(02):151-157.

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Root Distributions of Several Grasslands and Soil Nutrient Variation in the Riparian Zone of Three Gorges Reservoir

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 02 Page number: 151-157 Column: Public date: 2015-04-28

Title:: Root Distributions of Several Grasslands and Soil Nutrient Variation in the Riparian Zone of Three Gorges Reservoir

Author(s):: ZHONG Ronghua^1,2, BAO Yuhai¹, HE Xiubin¹, GAO Jinzhang^1,2, YAN Dandan^1,2; 1. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: root distribution; soil nutrient; revegetation; riparian zone; Three Gorges Reservoir

CLC:: S152.7

DOI:: -

Abstract:: To understand the root distribution in the soil profile and its influence on soil nutrients, roots of Hemarthria altissima, Hemarthria compressa, Paspalum paspaeoides and natural recovery grass and soils from these grasslands were investigated in the riparian zone of Three Gorges Reservoir. Root analysis systems (WinRHIZO Pro. 2009c) was used to characterize the root systems and conventional statistical analysis methods were used to describe root distributions in soil profiles and their relationship with soil nutrients. The results showed that roots mainly distributing in 0—5 cm soil layer, root length density (RLD) and root area ratio (RAR) decreased as the power law function with soil depth. The plant and root systems have significant impact on the distributions of soil nutrients in soil profiles. Soil organic carbon (SOC) and total N content in the bare land were significantly lower than those in the grasslands. Total nutrients in H.compressa land and natural recovery land were higher than those in the other grasslands. The RLD and RAR were significantly correlated with SOC and total N content in four studied grasslands.

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