10.1007/s40093-019-00296-6

Changes on microbial C and enzyme activities in soil with amendment of composted tannery sludge after 9 years

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  • Antonio Victor Cavalcante Rocha Silva1,
  • Francisco Barbosa De Macedo Junior1,
  • Jadson Emanuel Lopes Antunes1,
  • João Pedro Alves De Aquino1,
  • Regina Maria Silva Sousa1,
  • Louise Melo De Souza Oliveira1,
  • Ademir Sérgio Ferreira De Araujo1,
  1. Soil Quality Lab., Agricultural Science Center, Federal University of Piauí, Teresina, PI, 64049-550, Brazil

Received: 2019-02-05

Accepted: 2019-08-21

Published in Issue 2019-08-29

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Victor Cavalcante Rocha Silva, A., Barbosa De Macedo Junior, F., Emanuel Lopes Antunes, J., Pedro Alves De Aquino, J., Maria Silva Sousa, R., Melo De Souza Oliveira, L., & Sérgio Ferreira De Araujo, A. (2019). Changes on microbial C and enzyme activities in soil with amendment of composted tannery sludge after 9 years. International Journal of Recycling of Organic Waste in Agriculture, 8(4). https://doi.org/10.1007/s40093-019-00296-6
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Abstract

Purpose The consecutive amendment of composted tannery sludge (CTS) could promote changes in the status of soil microorganisms. Thus, this study evaluated the changes on microbial C and enzyme activities in soil after 9 years of CTS amendment.
Methods CTS was amended from 2009 to 2018 at five rates: 0, 2.5, 5, 10, and 20 ton ha−1. In 2018, the soil chemical properties (pH, electric conductivity, P, K, Cr, and total organic C), microbial C and enzyme activities were evaluated after 30 days from the amendment.
Results The values of chemical properties increased after nine years of CTS application. The content of microbial C and the enzyme activities increased with the amendment of 2.5 and 5 ton ha−1, and decreased with the amendment of10 and 20 ton ha−1.
Conclusion This study showed that the amendment of10 and 20 ton ha−1 of CTS increased soil pH and Cr concentration and promoted a decreasing on soil microbial C and enzyme activities.

Keywords

  • Enzymes activities,
  • Industrial waste,
  • Waste management,
  • Microbial biomass
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