The dynamics of phosphorus fractions and the factors driving phosphorus cycle in Zoige Plateau peatland soil

Ling Luo, Haoyang Ye, Danhua Zhang, Ji Dong Gu, Ouping Deng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Phosphorus (P) is an essential nutrient, limiting plant growth and microbial activity in many ecosystems. However, a few studies have been conducted to investigate P dynamics and the factors driving P dynamics in peatland soils. Therefore, this study chose Zoige Plateau peatland (the largest peatland in China) to reveal P dynamics and the possible driving factors through fractionating soil P and investigating a series of abiotic and biotic factors. It is found that season, peatland type, and soil depth could strongly affect P dynamics. H2O–P and NaHCO3–P (labile P) had lower content, while NaOH–P, HCl–P, Mix-P, and Residual-P (non-labile P) were the dominant fractions. Besides, the sum of P fractions was higher than the traditional measurement of total P, suggesting P storage might be underestimated in peatland soils. Moreover, it is observed that biotic factors affected P fractions more than abiotic factors, and fungi affected refractory P more than bacteria. This study provides essential information for understanding P cycling in peatland soils and emphasizes specific microbes related to P cycling, which should be paid more attention to in the future.

Original languageEnglish
Article number130501
JournalChemosphere
Volume278
DOIs
StatePublished - Sep 2021

Keywords

  • Labile P
  • Non-labile P
  • P fractions
  • Phosphatase
  • Zoige Plateau peatland

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