Vertisols and cambisols had contrasting short term greenhouse gas responses to crop residue management

Giuseppe Badagliacca*, RM Rees, Dario Giambalvo, Sergio Saia

*Corresponding author for this work

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Abstract

In sustainable agriculture crop residues management should consider the interactions between soil and residue properties, which can affect the decomposition and global greenhouse gases (GHGs) emission. Through a laboratory experiment, we investigated the effect of the management (incorporation and surface placement) of wheat and faba bean residues on their decomposition and CO 2, CH 4 and N 2O emissions from two soils, a Chromic Vertisol and an Eutric Cambisol. In the Vertisol, wheat residues increased the CO 2 emission more than faba bean when left on the surface whereas no differences among residues were observed when incorporated. In the Cambisol, faba bean emitted more than wheat when left in the surface and less when incorporated. Total CH 4 emissions were higher in faba bean in Cambisol for both management and only when applied in the surface in Vertisol. Total N 2O emission in the Vertisol was higher when faba bean was incorporated, and wheat was left on the surface. In the Cambisol, wheat addition increased total N 2O emissions by 20% compared to faba bean, with no differences between managements. Our study confirmed that contrasting properties among tested soils resulted in significant interactions with residues own degradability and their placement affecting residue decomposition, soil C and N dynamics, and GHGs emission.

Original languageEnglish
Pages (from-to)222-233
Number of pages12
JournalPlant, Soil and Environment
Volume66
Issue number5
Early online date14 May 2020
DOIs
Publication statusFirst published - 14 May 2020

Keywords

  • Carbon dioxide
  • Methane
  • Nitrous oxide
  • Soil texture
  • Sustainable management

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