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[1]WANG Yueling,MA Pan,XU Hao,et al.Stoichiometry of Soil C, N and P in Abandoned Terrace Lands with Different Years in Hilly Region of Southern Ningxia[J].Research of Soil and Water Conservation,2019,26(06):25-31.

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Stoichiometry of Soil C, N and P in Abandoned Terrace Lands with Different Years in Hilly Region of Southern Ningxia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 25-31 Column: Public date: 2019-10-17

Title:: Stoichiometry of Soil C, N and P in Abandoned Terrace Lands with Different Years in Hilly Region of Southern Ningxia

Author(s):: WANG Yueling¹, MA Pan¹, XU Hao¹, DONG Liguo¹, WAN Haixia¹, CAI Jinjun²; 1. Ningxia Key Laboratory of Desertification Control and Soil and Water Conservation, Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
2. Ningxia Institute of Agriculture Resources and Environment, Yinchuan 750002, China

Keywords:: C; N and P; stoichiometry ratio; hilly region of southern Ningxia; abandoned terrace land

CLC:: S153.6

DOI:: -

Abstract:: We investigated effects of years of abandoned terrace lands on the stoichiometry of soil C, N and P, and provided scientific support for management and vegetation recovery of abandoned terrace lands in southern Ningxia. Abandoned terrace lands with different years (2 years, 5 years, 15 years, 17 years, 20 years) were selected as subjective to research the contents of soil C, N and P in 0-60 cm layers by combining the means of field sampling and laboratory analysis. The results showed that:in 0-60 cm layer, the contents of soil C and N decreased as depth increased, there was a enrichment of C and N in 0-10 cm layer, which declined first and increased as abandon years increased; the contents of C and N in 4 layers of subsurface profile declined with fluctuation, the total P evenly distributed in soil layers; the ratio of C:N increased with fluctuation as abandon years increased, the C:N was the highest in the 0-40 cm layer in abandoned land with 20 years of abandonment, and demonstrated a significant variation with other abandoned years (p<0.05); the ratios of C:P and N:P in 0-10 cm layer increased first and then declined with the abandonment years, but totally decreased in other layers, the ratio of C:P and N:P decreased as soil depth increased, the ratio of C:N was not related to total N and C significantly, the ratio of C:P was extremely significant related to soil C and significant related to total P, the ratio of N:P was extremely significant related to soil N and significant related to total P. The contents and stoichiometry of C, N and P were affected by both abandonment age and soil depth. Abandonment of terrace land can improve soil fertility to a certain extent.

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