Resumo

FREITAS, Teresa R. et al. Winery wastewater management: potential of its reuse in the irrigation of ornamental species. Rev. de Ciências Agrárias [online]. 2019, vol.42, n.3, pp.11-20. ISSN 0871-018X.  https://doi.org/10.19084/rca.16715.

This study evaluated the possibility of reuse treated winery wastewater (EV) for the irrigation of ornamental species. For that, initially phytotoxicity tests were made in seeds of Lepidium sativum and a grass mixture exposed to increasing concentrations of EV and an irrigation experiment in Petunia x atkinsiana with four treatments: winery wastewater without dilution (EV100%), diluted EV (EV60%), EV with corrected pH (EVT) and control (EV0%). After the irrigation experiment, morphological and biochemical analyses were performed. The tests revealed that EV potentiated germination of grass mixture seeds, although it was moderately phytotoxic to L. sativum. In the irrigation experiment in P. x atkinsiana, the EV0% and EV100% treatments stood out positively in relation to EV60% and EVT treatments in growth and leaf anatomy. However, there were no changes in the foliar concentrations of photosynthetic pigments and total phenols. Although length of the root system and root and leaf areas were higher in EV0% plants, there were no changes in colour and number of flowers in treatments. These visual and aesthetic characteristics are valued commercially in ornamental species, so it was concluded that the reuse of EVs for irrigation of petunias may be a sustainable alternative.

Palavras-chave : Growth analysis; Leaf anatomy; Petunia x atkinsiana; Phytotoxicity; Reuse of wastewater.

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