5. Conclusions
Our results suggest that each inflorescence litter type provides a specific elemental stoichiometric fingerprint, probably due to differential inflorescence litter degradation processes and differential microbial activity combined with the characteristics of the type of soil to which it is added. Our results suggest that nutrient assimilation and immobilization by microbial activity and/ or soil adsorption mechanisms are faster when the litter of P. piscipula is added, compared to that of J. mimosifolia , probably due to different levels of lability and content of recalcitrance substrates for each inflorescence litter. The P. piscipula inflorescence litter appears to be richer in labile compounds such as cellulose, proteins and nucleic acids, and the J. mimosifolia material is rich in oleic acid. However, further studies are necessary to prove this premise of relative recalcitrance material, and the existence of microorganisms associated with in these substrates, and in combination with soil mixtures. This study proposes to continue with research evaluating inflorescence litters in urban areas as raw material for soil enriching and / or improving at local scales.