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Clay minerals-organic matter interactions in relation to carbon stabilization in soils

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

Published
  • Binoy Sarkar
  • Mandeep Singh
  • Sanchita Mandal
  • Gordon J. Churchman
  • Nanthi S. Bolan
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Publication date13/04/2018
Host publicationThe Future of Soil Carbon: Its Conservation and Formation
EditorsCarlos Garcia, Paolo Nannipieri, Teresa Hernandez
PublisherElsevier Inc.
Pages71-86
Number of pages16
ISBN (Print)9780128116876
<mark>Original language</mark>English

Abstract

Stabilization of C in soil is important for minimizing greenhouse gas emission into the atmosphere and for improving the soil fertility. The physical, chemical, and biological properties of soil greatly influence the C protection capacity. Both the physical and chemical properties of soils are directly or indirectly governed by clay minerals, which are the most reactive soil particles. Apart from the amount of clays, clay types are also very important in protecting soil C. Clay minerals provide both permanent and variable surface charges and different specific surface areas that are crucial to determine the C protection capacity of soils. They form organo–mineral complexes, promote aggregate establishment, and protect soil organic matter against microbial decomposition. This chapter aims to provide an overview of the role of various clay minerals in protecting organic C in soils and highlights the mechanisms of C sequestration by clay minerals.