Effects of municipal solid waste compost, farmyard manure and chemical fertilizers on wheat growth, soil composition and soil bacterial characteristics under Tunisian arid climate

Hanene Cherif*, Fathia Ayari, Hadda Ouzari, Massimo Marzorati, Lorenzo Brusetti, Naceur Jedidi, Abdennaceur Hassen, Daniele Daffonchio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The use of municipal solid waste compost (MSWC) as soil organic amendment is of an economic and environmental interest. However, little is known about the effectiveness of MSWC application on agricultural soil in northern Africa arid climate. We assessed the impact of five years' applications of different organic and mineral fertilizers on wheat grain yields and soil chemical and microbial characteristics. Soils were treated with MSWC at rates of 40 (C1) and 80 (C2) Mg ha-1, farmyard manure at a rate of 40 Mg ha-1 (M), chemical fertilizers (Cf) and the combinations (C1Cf, C2Cf, MCf). Wheat grain yield was enhanced with all amendments. Parallel increases of heavy metal levels and faecal coliform were also recorded except for Cf treatments. Based on wheat grain yield, heavy metal and faecal coliform data, we determined the treatment effectiveness index (Exx), calculated by dividing the pollutant increase ratio by the grain yield increase ratio. The treatment effectiveness index EC1 indicated lower faecal and heavy metal pollution with positive gains in wheat yields. Despite polluting effects on soil determined by the different treatments, no significant differences between treatments were observed in total bacterial count and soil bacterial community structure, as shown by 16S rRNA gene PCR-denaturing gradient gel electrophoresis banding patterns and 16S rRNA gene Length Heterogeneity-PCR analysis. According to the collected data, the use of MSWC at a rate of 40 Mg ha-1 might be recommended.

Original languageEnglish (US)
Pages (from-to)138-145
Number of pages8
JournalEuropean Journal of Soil Biology
Volume45
Issue number2
DOIs
StatePublished - Mar 1 2009

Keywords

  • Agricultural soil
  • Bacterial community structure
  • Heavy metals
  • Municipal solid waste compost
  • Wheat grain yields

ASJC Scopus subject areas

  • Microbiology
  • Soil Science
  • Insect Science

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