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Journal of Soils and Sediments

, Volume 19, Issue 1, pp 140–147 | Cite as

Pedotransfer functions for estimating the field capacity and permanent wilting point in the critical zone of the Loess Plateau, China

  • Jiangbo Qiao
  • Yuanjun Zhu
  • Xiaoxu Jia
  • Laiming Huang
  • Ming’an Shao
Soils, Sec 2 • Global Change, Environ Risk Assess, Sustainable Land Use • Research Article
  • 82 Downloads

Abstract

Purpose

Field capacity (FC) and permanent wilting point (PWP) are important physical properties for evaluating the available soil water storage, as well as being used as input variables for related agro-hydrological models. Direct measurements of FC and PWP are time consuming and expensive, and thus, it is necessary to develop related pedotransfer functions (PTFs). In this study, stepwise multiple linear regression (SMLR) and artificial neural network (ANN) methods were used to develop FC and PWP PTFs for the deep layer of the Loess Plateau based on the bulk density (BD),sand, silt, clay, and soil organic carbon (SOC) contents.

Materials and methods

Soil core drilling was used to obtain undisturbed soil cores from three typical sites on the Loess Plateau, which ranged from the top of the soil profile to the bedrock (0–200 m). The FC and PWP were measured using the centrifugation method at suctions of − 33 and − 1500 kPa, respectively.

Results and discussion

The results showed that FC and PWP exhibited moderate variation where the coefficients of variation were 11 and 23%, respectively. FC had significant correlations with sand, silt, clay, and SOC (P < 0.01), while there were also significant correlations between all of the variables and PWP. In addition, sand was an important input variable for predicting FC, and clay and BD for predicting PWP. The performance of the SMLR and ANN approaches was similar.

Conclusions

In this study, we developed new PTFs for FC and PWP as the first set of PTFs based on data obtained from deep profiles in the Loess Plateau. These PTFs are important for evaluating the soil water conditions in the deep profile in this region.

Keywords

Earth’s critical zone Field capacity Pedotransfer function Permanent wilting point 

Notes

Acknowledgements

The authors thank the editor and reviewers for their valuable comments and suggestions.

Funding information

This study was supported by the National Natural Science Foundation of China for a major international cooperation program between China and England (41571130081), the National Natural Science Foundation of China (41371242 and 41530854), and the National Key Research and Development Program of China (2016YFC0501706-03).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jiangbo Qiao
    • 1
  • Yuanjun Zhu
    • 2
  • Xiaoxu Jia
    • 3
  • Laiming Huang
    • 3
  • Ming’an Shao
    • 2
    • 3
  1. 1.College of Resources and EnvironmentNorthwest A&F UniversityYanglingChina
  2. 2.State Key Laboratory of Soil Erosion and Dryland Agriculture on the Loess PlateauNorthwest A&F UniversityYanglingChina
  3. 3.Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina

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