Resumo

GOMEZ-JORRIN, Luís A. et al. Microbial biomass carbon and nitrogen  content in Havana Soil. Agron. Mesoam [online]. 2012, vol.23, n.1, pp.179-187. ISSN 2215-3608.

This research was carried  out to calculate the  microbial  biomass  carbon   and   nitrogen  content  in Red Ferralitic Soils from  the Havana province, using the “fumigation  and  extraction”  method.  For  this  work  soil samples  were taken from four different sites (Bainoa, La Salud,  Quivicán  and  Guanajay)  with  different  physicalchemical characteristics, including organic  matter content which  ranged  from  2.8  and  5%.  The  sensibility  of  the methods employed was asssessed using the mean standard error as statistical parameter. The C content in soil microbial biomass ranged from 289 and 425 μg/g of soil (289 - 425 mg/kg of soil) and had it a significant correlation by soil organic matter content. On the other hand, N content in soil microbial biomass ranged from 62 and 90 μg/g of soil (62-90 mg/kg of soil), and had it a significant correlation by soil nitrogen content. The mean standard error of microbial C  determinations  ranged  from  2  and  16,  being  slightly superior to previous reports, while the mean standard error of  the  microbial N determinations were among  adequate limits. Finally, this methodology was adapted to laboratory conditions.

Palavras-chave : Microbial biomass; fumigation-extraction method; carbon and nitrogen; red ferralitic soil.

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