Impact of vegetation zones on soil phosphorus distribution in Northwest China

Pingping Liu, Huarui Ren, Yiling Zhang, Tiantian Wu, Chunli Zheng and Tiancheng Zhang
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Pingping Liu: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, P.R. China
Huarui Ren: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, P.R. China
Yiling Zhang: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, P.R. China
Tiantian Wu: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, P.R. China
Chunli Zheng: Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, P.R. China
Tiancheng Zhang: Civil Engineering Department, University of Nebraska-Lincoln at Omaha Campus, Omaha, USA

Plant, Soil and Environment, 2019, vol. 65, issue 2, 71-77

Abstract: Soil phosphorus (P) fraction distribution and correlation at different soil depths along vegetation succession in wetland next to a lake in the Hongjiannao National Nature Reserve, China were studied using the Hedley fraction method. The overall trend for soil P content was calcium-bound P (Ca-P) > organic P (O-P) > aluminum/iron-bound P (Al/Fe-P) > labile-P (L-P). Ca-P and O-P were the predominant P forms in all the soil layers, representing on average 53.8‒84.9% and 12.9‒45.2% of the total P, respectively, whereas L-P (ranging from 0.5 to 1.5 mg/kg) was less than 1%. The soil in the Bassia dasyphylla and Carex duriuscula vegetation zones had the largest P contents. In these two vegetation zones, soil L-P was greatest in the surface soil layer; Al/Fe-P was most abundant in the deep layer; O-P was highest in the middle layer. Ca-P levels were generally similar across all soil layers. Regression analysis showed that distribution of P was highly correlated with organic carbon, total nitrogen and plant biomass. Results showed that the soils under Bassia dasyphylla and Carex duriuscula have considerable carbon input potentials, which would facilitate P mineralization as compared to other plants.

Keywords: arid area; land cover; soil profile; phosphorus speciation; management practice (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:2:id:631-2018-pse

DOI: 10.17221/631/2018-PSE

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