| Autor: |
Rocha SMB; Laboratório de Qualidade do Solo, Centro de Ciências Agrárias, Universidade Federal do Piauí, Campus da Socopo, 64049-550 Teresina, PI, Brazil., Antunes JEL; Laboratório de Qualidade do Solo, Centro de Ciências Agrárias, Universidade Federal do Piauí, Campus da Socopo, 64049-550 Teresina, PI, Brazil., Araujo FF; Universidade do Oeste Paulista, Campus II, Rodovia SP-270, Km 572, 19067-175 Presidente Prudente, SP, Brazil., Mendes LW; Laboratorio de Biologia Molecular e Celular, Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Av. Centenário, 303, 13400-970 Piracicaba, SP, Brazil., Sousa RS; Laboratório de Qualidade do Solo, Centro de Ciências Agrárias, Universidade Federal do Piauí, Campus da Socopo, 64049-550 Teresina, PI, Brazil., Araujo ASF; Laboratório de Qualidade do Solo, Centro de Ciências Agrárias, Universidade Federal do Piauí, Campus da Socopo, 64049-550 Teresina, PI, Brazil. |
| Abstrakt: |
Different physiognomies across the Cerrado could influence the microbial C:N:P ratio in the soil since these physiognomies present different abundance and diversity of plant species. Thus, the aim of this study was to evaluate the microbial C:N:P ratio in soil across three different physiognomies of Cerrado in the Northeast, Brazil, namely campo graminóide (dominance of grasses), cerrado stricto sensu (dominance of grasses, shrubs, low trees, and woody stratum), and cerradão (dominance of woody stratum). Campo graminóide was characterized by lower values of total organic C, N, microbial C:P, N:P, and soil C:N. Cerrado stricto sensu presented average values for most of the measured parameters, while cerradão presented higher values of microbial C, N, P, organic C, N and soil C:P and C:N ratios. The principal component analysis showed that the samples grouped according to the sites, with a clear gradient from campo graminóide to cerradão. Therefore, the differences of vegetation across physiognomies of Cerrado influenced the soil microbial C:N:P ratio, where cerradão showed highest microbial C:N:P ratio than soil under campo graminóide. |
