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Sökning: WFRF:(Yu Changxun) > (2020-2024) > Vertical distributi...

  • Qin, ZhilianHunan Normal Univ, China;Tianjin Univ, China (författare)

Vertical distributions of organic carbon fractions under paddy and forest soils derived from black shales : Implications for potential of long-term carbon storage

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • Elsevier,2021
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:lnu-101126
  • https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-101126URI
  • https://doi.org/10.1016/j.catena.2020.105056DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Black shales are characterized by a high content of organic carbon (C). Few studies have focused on the influence of land use on soil organic C (SOC) fractions from soils derived from black shale (black shale soils). The objective of this study was to elucidate the influence of land use on SOC fractions in black shale soils combining chemical determination and stable C isotope analysis techniques. Herein, we determined labile organic C (LOC), semilabile organic C (Semi-LOC), and recalcitrant organic C (ROC) fractions in various depths of soils in paddy fields (0-70 cm) and forests (0-120 cm) from black shale distribution region in Hunan province, China, and then investigated delta C-13 values of these soils. Results showed that the contents of LOC, Semi-LOC, and ROC in paddy soils (1.63-7.35 g kg(-1), 0.35-1.21 g kg(-1), and 3.75-14.8 g kg(-1), respectively) and forest soils (0.73-4.94 g kg(-1), 0.12-0.89 g kg(-1), and 1.44-8.96 g kg(-1), respectively) are significantly decreased with increasing depth. The contribution made by LOC to SOC in paddy soils was significantly lower than that in forest soils, while the contribution made by ROC to SOC was significantly higher in paddy soils than that in forest soils. In these two land uses, the delta C-13 values were higher in SOC compared to the ROC fraction, while the delta C-13 values were close in the ROC fraction below 20 cm soil depth. Our study indicated that i) new C is mainly limited to the surface soil layer (0-10 cm) in forests, while it can be leached along the soil profiles in paddy fields; ii) the estimated ROC pool is similar to 900 Pg within the 0-100 cm soil layer in terrestrial ecosystems, which should better represent the ability of soil C sequestration.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Yang, XiaominTianjin Univ, China (författare)
  • Song, ZhaoliangTianjin Univ, China (författare)
  • Peng, BoHunan Normal Univ, China (författare)
  • Van Zwieten, LukasNew South Wales Dept Primary Ind, Australia (författare)
  • Yu, Changxun,1983-Linnéuniversitetet,Institutionen för biologi och miljö (BOM)(Swepub:lnu)chyuaa (författare)
  • Wu, SichengHunan Normal Univ, China (författare)
  • Mohammad, MohinuzzamanTianjin Univ, China (författare)
  • Wang, HailongFoshan Univ, China;Zhejiang A&F Univ, China (författare)
  • Hunan Normal Univ, China;Tianjin Univ, ChinaTianjin Univ, China (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Catena (Cremlingen. Print): Elsevier198, s. 1-80341-81621872-6887

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