Microbial community composition and necromass are important determinants of the soil organic carbon in agroforestry tree species


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Authors

  • manoj m Menpadi RESEARCH SCHOLAR
  • Manoj M
  • Dr. Geeta Singh Contributing author

Keywords:

Dr. Geeta Singh Contributing author

Abstract

To understand the role of native microbial community structure in the transformation of carbon in the root zone soils of commonly cultivated agroforestry trees, an investigation was to analyze distinct root zone soils of selected economically important agroforestry trees (Mango-Mangifera indica, Moringa-Moringa oleifera, Guava-Psidium guajava, Mulberry-Morus alba, Subabul-Leucaena leucocephala) from a mixed plantation orchard of Delhi (Northern Indian region). Soil samples were collected and assessed in terms of the composition of their microbial communities, using phospholipid fatty acid (PLFA) profiles, microbial structural components, namely aminosugars, ergosterol, muramicacid, glycoproteins–glomalins, and microbial biomass carbon. Significant differences in the community structure specific for each tree were recorded. Quantitative abundance of saprophytic fungi present in soil and soil microbial biomass revealed highest values in soil samples from Mango > Subabul > Mulberry  > Guava  > Moringa. The content of phospholipid marker for symbiotic arbuscular fungi (16:1ω5C) exhibited a similar trend among the five tree species Mango > Subabul > Guava > Moringa = Mulberry. The study suggests that the plant species selects the specific members of the rhizosphere microbial community, which influences the composition of bacterial cell wall molecules in soil samples. This highlights how plants are a key parameter regulating the amount of necromass generated, which is an important fraction of the soil organic carbon.

Submitted

24-08-2022

Published

26-12-2023

How to Cite

Microbial community composition and necromass are important determinants of the soil organic carbon in agroforestry tree species. (2023). Indian Journal of Agroforestry, 25(2). https://epubs.icar.org.in/index.php/IJA/article/view/127301