Resumo

CERON RINCON, Laura Emilia  e  ANCIZAR ARISTIZABAL GUTIERREZ, Fabio. Nitrogen and phosphorus cycles dynamics in Soils. Rev. colomb. biotecnol [online]. 2012, vol.14, n.1, pp.285-295. ISSN 0123-3475.

Biogeochemical cycle's phosphorus (P) and nitrogen (N) are dynamic systems taking place through the biosphere, whose mechanisms of transformation depends on the availability of these elements for different forms of life. It is accepted that the diversity and activity of microbial populations plays a crucial role in nutrient dynamics and therefore the challenge is to understand how they respond to environmental conditions. Microbial activity in soils depends on both the resource condition and its chemical, physical and biological properties. Concepts described herein have been used to understand the nitrogen and phosphorus dynamics, with the aim to discuss how the characteristics of the different organic and mineral fractions select the biological potential responsible for the turnover of these elements, scenario currently addressed through cultivation-independent techniques to study microbial populations in situ.

Palavras-chave : N and P dynamics; soil nutrients availability; organic and inorganic fractions; microbial activity.

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