Soil organic carbon fractions comparison after 40-year long-term fertilisation in a wheat-corn rotation field

Xiaolu Sun, Jingtao Liu, Shutang Liu and Wenlong Gao
Additional contact information
Xiaolu Sun: College of Agronomy, Qingdao Agricultural University, Qingdao, Shandong, P.R. China
Jingtao Liu: College of Resources and Environment, Qingdao Agricultural University, Qingdao, Shandong, P.R. China
Shutang Liu: College of Resources and Environment, Qingdao Agricultural University, Qingdao, Shandong, P.R. China
Wenlong Gao: College of Resources and Environment, Qingdao Agricultural University, Qingdao, Shandong, P.R. China

Soil and Water Research, 2022, vol. 17, issue 3, 149-157

Abstract: Several experimental methods have been developed to fractionate soil organic carbon (SOC) into functional sub-pools. However, which fractions had the potential to better reflect the SOC dynamics responding to fertilisation are still under discussion. Thus, we compared different SOC fractions (microbial biomass carbon, MBC; dissolved organic carbon, DOC; permanganate-oxidisable carbon, POXC; particle organic carbon, POC, and aggregation organic carbon fractions) and the soil respiration rate in a wheat-corn rotation field after 40 years of manure and N fertilisation in North China to search for the most sensitive SOC fractions to fertilisation. Manure increased the organic carbon (OC) contents of all the soil fractions (26.5 to 362.8%) and the POC (18.0 to 43.7%) and macro-aggregation percentages (3.0 to 4.4%), which indicated an increasing physical-protected aggregated OC fraction. N fertilisation alone slightly increased the OC contents of all the soil fractions and DOC percentage, but decreased the macro-aggregation OC percentage, which suggests the increasing possibility that the SOC is exposed to microbial communities causing a decreasing aggregation formation. However, when a high level of both the manure and N fertiliser were applied, the excessive N in the soil stimulates the soil microbial activity and decreases the SOC content comparing it to the same level of the manure fertiliser addition.

Keywords: aggregation organic carbon; dissolved organic carbon; microbial biomass carbon; particle organic carbon; permanganate-oxidisable carbon (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://swr.agriculturejournals.cz/doi/10.17221/144/2021-SWR.html (text/html)
http://swr.agriculturejournals.cz/doi/10.17221/144/2021-SWR.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlswr:v:17:y:2022:i:3:id:144-2021-swr

DOI: 10.17221/144/2021-SWR

Access Statistics for this article

Soil and Water Research is currently edited by Ing. Markéta Knížková, (Executive Editor)

More articles in Soil and Water Research from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().