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Biology and Fertility of Soils

, Volume 30, Issue 3, pp 245–250 | Cite as

Mineralization of organic sulfur and its importance as a reservoir of plant-available sulfur in upland soils of north China

  • W. Zhou
  • S. T. Li
  • H. Wang
  • P. He
  • B. Lin
ORIGINAL PAPER

Abstract

 An open incubation technique was used to measure S mineralization in a range of upland soils of north China. Six mineralization patterns were examined, and a soil S-exhaustion experiment with ryegrass (Lolium multiflorum L.) was conducted to investigate the availability of various organic S pools to plants. For all of the 12 soils tested, the release of S as SO42– was curvilinear with time, and during a 28-week incubation at 30  °C the amount of S mineralized ranged from 14.0 mg S kg–1 soil to 37.4 mg S kg–1 soil. A first-order model and Gompertz model appeared to best describe S mineralization. Examination of the soils after incubation revealed the bulk of the mineralized S was mainly derived from the C-bonded S pool, while the majority of mineralized S under soil S exhaustion by ryegrass was derived from the HI-reducible S pool.

Key wordsOrganic sulfur Mineralization Sulfur exhaustion Sulfur fraction Upland soils 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • W. Zhou
    • 1
  • S. T. Li
    • 1
  • H. Wang
    • 1
  • P. He
    • 1
  • B. Lin
    • 1
  1. 1.Institute of Soil and Fertilizer, Chinese Academy of Agricultural Sciences, 30 Baishiqiao Road, Beijing 100081, China e-mail: Wzhou@ppi.caas.ac.cn, Tel.: +86-10-68918671 Fax: +86-10-68975161CN

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