Microflora dynamics in earthworms casts in an artificial soil (biosynthesol) containing lactic acid oligomers

Abstract

ABSTRACT

Comparative Microbial Analysis of Earthworm Casts Collected From Ikenne, Ogun State, Nigeria

“…Result of this study showed the presence of several bacterial and fungal species in the different earthworm cast examined. This agrees with the findings of several authors who had reported the occurrence of several species of bacteria and fungi in earthworm casts (Alauzet, et al, 2001;Prakash, et al, 2008;Jayakumar, et al, 2009). Microorganisms generally flourish in earthworm casts (Domsch and Banse 1972).…”

“…The presence of the fungi Aspergillus, Penicillium and Fusarium in the earthworms casts is not surprising as the genera Aspergillus and Penicillium are frequently found in soils (Torres et al, 1999;Alauzet, et al, 2001). Tiunov and Scheu (2000) reported that the biomass of fungi is higher in Lumbricus terrestris casts than in the surrounding soil.…”

“…The presence of Fusarium oxisporum, a plant pathogen in turret cast and Klebsiella aerogenes and Streptococcus feacalis in mass cast might have been due to the ingestion of the bacteria species and the spores of this fungus by the earthworm species associated with them. Previous work in literature had earlier suggested that earthworms may ingest the spores of this microorganisms and deposits it along with their casts (Edwards and Lofty, 1977;Alauzet, et al, 2001) The presence of Bacillus licheniformis in Pellet Cast is an added advantage to this cast since these bacteria contribute to nutrient cycling and displays antifungal activities.…”

Degradability: Enzymatic and in Simulated Compost Soil of PLLA:PCL Blend and on Their Composite with Coconut Fiber

“…According to Alauzet et al [29], PLA ester hydrolysis in abiotic aqueous media depends on autocatalysis via chain end carboxylic groups and diffusion reaction phenomena involving water and oligomer molecules formed by degradation by means of its solubility in aqueous media. When submitted to heat and water, high molecular weight PLLA degrade to oligomer (PLA of low molecular weight), dimer and monomer of lactic acid.…”

Microbial characterisation of vermicompost and compost of urban waste processed by three earthworm species - Eudrilus eugeniae, Eisenia fetida and Perionyx excavatus

“…However, fungal growth decreased towards end of the experiment. It has been reported that earthworms feed on fungi for their protein/nitrogen requirement (Cooke, 1983;Moody et al, 1995;Ranganathan and Parthasarathi, 2000;Edwards, 2004), which was probably the reason for the less diversity of fungal counts at the end of the vermicomposting process (Alauzet et al, 2001;Nagavallemma et al, 2006). Bacterial count decreased gradually from the 0 to 15 days and further to 60 days of processing.…”