Mixed cropping regimes promote the soil fungal community under zero tillage
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Fungi of yield soils represent a significant portion of the microbial biomass and reflect sensitivity to changes in the ecosystem. Our hypothesis was that crops included in cropping regimes under the zero tillage system modify the structure of the soil fungi community. Conventional and molecular techniques provide complementary information for the analysis of diversity of fungal species and successful information to accept our hypothesis. The composition of the fungal community varied according to different crops included in the cropping regimes. However, we detected other factors as sources of variation among them, season and sampling depth. The mixed cropping regimes including perennial pastures and one crop per year promote fungal diversity and species with potential benefit to soil and crop. The winter season and 0–5 cm depth gave the largest evenness and fungal diversity. Trichoderma aureoviride and Rhizopus stolonifer could be used for monitoring changes in soil under zero tillage.
KeywordsSoil Cropping regime Diversity Fungi DGGE
We thank Prof. M. Oyarzabal for English assistance. This work was supported by funding from the PIP -CONICET 2014-2016 COD: 112-20130100280 and by the Individual Postdoctoral scholarship of CONICET.
LB Silvestro designed and performed the experiments, analysed and interpreted the data, and wrote the manuscript. F Biganzoli analysed and interpreted the data and wrote the manuscript. Stenglein SA, H Forjan and L Manso supplied material and wrote the manuscript. MV Moreno designed the experiments, interpreted the data and wrote the manuscript. All authors discussed the results and commented on the manuscript.
The authors declare no competing financial interests.
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