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Effects of air-drying and freezing on phosphorus fractions in soils with different organic matter contents

Author

Listed:
  • G. Xu

    (The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, P.R. China)

  • J.N. Sun

    (The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, P.R. China)

  • R.F. Xu

    (State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, P.R. China)

  • Y.C. Lv

    (The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, P.R. China)

  • H.B. Shao

    (The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, P.R. China
    Institute for Life Sciences, Qingdao University of Science and Technology, Qingdao, P.R. China)

  • K. Yan

    (The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, P.R. China)

  • L.H. Zhang

    (The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai, P.R. China)

  • M.S.A. Blackwell

    (Rothamsted Research, North Wyke, Okehampton, Devon, United Kingdom)

Abstract

Little is known about the effects of air-drying and freezing on the transformation of phosphorus (P) fractions in soils. It is important that the way in which soils respond to such perturbations is better understood as there are implications for both P availability and loss to surface waters from soils. In this study, the effects of air-drying and freezing were investigated using two soils, one being a forest soil (FS) high in organic matter and the other being a sterile soil (SS) low in organic matter. Soil P was fractionated using a modified Hedley fractionation method to examine the changes of phosphorus fractions induced by air-drying and freezing. Generally, there were no significant differences of total phosphorus among the three treatments (CV% < 10%). Compared with field moist soils, freezing the soil evoked few changes on phosphorus fractions except that the resin-P increased in FS soil. On the contrary, air-drying significantly changed the distribution of phosphors fractions for both soils: increased the labile-P (especially resin-P) and organic-P (NaHCO3-Po, NaOH-Po and Con.HCl-Po) at the expense of NaOH-Pi and occlude-P (Dil.HCl-P and Con.HCl-Pi). Resin-P significantly increased by 31% for SS soil and by 121% for FS soil upon air-drying. The effect of air-drying seemed to be more pronounced in the FS soil with high organic matter content. These results indicated that drying seem to drive the P transformation form occlude-P to labile-P and organic-P and accelerated the weathering of stable P pool. This potentially could be significant for soil P supply to plants and P losses from soils to surface waters under changing patterns of rainfall and temperature as predicted by some climate change scenarios.

Suggested Citation

  • G. Xu & J.N. Sun & R.F. Xu & Y.C. Lv & H.B. Shao & K. Yan & L.H. Zhang & M.S.A. Blackwell, 2011. "Effects of air-drying and freezing on phosphorus fractions in soils with different organic matter contents," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(5), pages 228-234.
    • Handle: RePEc:caa:jnlpse:v:57:y:2011:i:5:id:428-2010-pse
    DOI: 10.17221/428/2010-PSE
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    References listed on IDEAS

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    1. J. Matula, 2010. "Differences in available phosphorus evaluated by soil tests in relation to detection by colorimetric and ICP-AES techniques," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(6), pages 297-304.
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