Long-term winter wheat cropping influenced soil organic carbon pools in different aggregate fractions of Chernozem soil

Srdjan Šeremešić, Vladimir Ćirić, Ivica Djalović, Jovica Vasin, Tijana Zeremski, Kadambot H. Siddique, Muhammad Farooq*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this study, the role of the different management strategies was investigated, to elucidate soil organic carbon (SOC) loss under the long-term winter wheat cropping. Soil samples from wheat-based cropping systems and native vegetation were analyzed to assess SOC, total nitrogen, water-stable aggregates, mean weight diameter, and the carbon management index. Tillage practices involved moldboard plowing and field cultivators. Differences in SOC contents between treatments were dependant on tillage intensity, biomass production, and fertilization. In the 0–20 cm layer, the highest SOC contents occurred in the > 2000 µm soil fraction that received 40 t ha–1 farmyard manure every fourth year and the lowest SOC content occurred in the 53–250 µm fraction in the unfertilized treatment. Manure application influenced SOC content and its distribution among soil aggregate fractions but did not affect water-stable aggregates. SOC was primarily enriched within the > 2000 µm aggregates, so their turnover is essential for SOC preservation. The carbon management index was highest in 20–40 cm soil depth, which emphasizes the importance of deeper soil layers in SOC conservation. In conclusion, declining SOC levels are related to tillage practices which could not be compensated by fertilization or crop rotation.

Original languageEnglish
Pages (from-to)2055-2066
Number of pages12
JournalArchives of Agronomy and Soil Science
Volume66
Issue number14
DOIs
Publication statusPublished - 2020

Keywords

  • carbon management index
  • cropping system
  • fertilization
  • Water-stable aggregates

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

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