Effect of cyanobacteria on the soil microflora activity and maize remains degradation in a culture chamber experiment
2008
Zulpa, G. (Intendente Guiraldes, Buenos Aires (Argentina). Departamento de Biodiversidad y Biologia Experimental) | Siciliano, M.F. (Universidad de Buenos Aires (Argentina). Facultad de Agronomia) | Zaccaro, M.C. (Universidad de Buenos Aires (Argentina). Facultad de Agronomia) | Storni, M. (Universidad de Buenos Aires (Argentina). Facultad de Agronomia) | Palma, M.
Crop remains are mainly colonized by fungi and prokaryotes. In this work, we studied the effect of cyanobacterial products of Tolypothrix tenuis and Nostoc muscorum on the microbiological activity and the nutrient content of the soil underlying the remains of maize and on the degradation of the remains. The biomass and extra cellular products of both strains increased the soil microbial activity. N. muscorum and T. tenuis biomasses increased the soil oxidizable C (15%; 14%), total N (10%; 12%) and available P (22%; 32%), respectively. T. tenuis extra cellular products increased by 28% oxidizable carbon and N. muscorum extra cellular products increased by 15% the available phosphorus. Both strains biomasses and extra cellular products decreased the maize remains dry weight and Nostoc decreased their C content and so C: N ratio was closer to soil normal value. These are promissory micro-organisms to accelerate the maize remains degradation, ensuring the sustainability of the ecosystem.
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