Morphological response of Hordeum vulgare cv. La Molina 96 and Chenopodium quinoa cv. La Molina 89 to varying concentrations of petroleum sludge
DOI:
https://doi.org/10.56926/repia.v5i1.124Keywords:
asphaltenes, bioindicators, phytotoxicity, heavy hydrocarbons, soil contamination, plant toleranceAbstract
The contamination of agricultural soils with petroleum residues poses a threat to plant development and agroecological productivity. This study aimed to evaluate the morphological response of barley (Hordeum vulgare cv. La Molina 96) and quinoa (Chenopodium quinoa cv. La Molina 89) to different concentrations of petroleum sludge in the soil. A completely randomized design was employeded with six treatments (0 %, 0.5 %, 1 %, 2 %, 4 %, and 6 %) and three replicates per treatment under controlled conditions. Morphophysiological variables including plant height, number of leaves, leaf length, number of grains (in barley), and estimated leaf area were measured. The results showed that both crops failed to germinate from 4% contamination. Barley exhibited reductions of up to 81 % in height, and 84 % in leaf area at 2 % petroleum sludge. Quinoa germinated in all treatments; however, at 2%, its height was reduced by 87% and the number of leaves dropped by 90%. It is concluded that petroleum sludge causes severe phytotoxic effects in both species, with quinoa being relatively more tolerant. These findings suggest its potential use in contaminated soils or as a bioindicator species.
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