Growth of four tropical tree species in petroleum-contaminated soil and effects of crude oil contamination
Cita: Pérez-Hernández, I., Ochoa-Gaona, S., Adams, R.H., Rivera-Cruz, M.C., Pérez-Hernández, V., Jarquín-Sánchez, A., et al. 2016. Growth of four tropical tree species in petroleum-contaminated soil and effects of crude oil contamination. Environmental Science and Pollution Research. DOI:10.1007/s11356-016-7877-5.
En: Environmental Science and Pollution Research. Vol. , no. (2016)ISSN: 0944-1344
Fecha de realización: 2016/06/01
Tipo: Artículo con arbitraje
Tema(s): Agronomía, Ciencia del Suelo, Ciencia Medioambiental, Gestión de Residuos, Silvicultura
Resumen: "Under greenhouse conditions, we evaluated establishment of four tree species and their capacity to degrade crude oil recently incorporated into the soil; the species were: Cedrela odorata (tropical cedar), Haematoxylum campechianum (tinto bush), Swietenia macrophylla (mahogany) and Tabebuia rosea (macuilis). Three month old plants were planted in soil with three treatments of heavy petroleum and a control (C0: 0 mg kg-1, C1: 18,000 mg kg-1, C2: 31,700 mg kg-1, C3: 47,100 mg kg-1) with four repetitions per treatment and species; the experiment was carried out for 245 days. Height and biomass of all species significantly diminished as petroleum concentration increased, although plant survival was not affected. The quantity of Colony Forming Units (CFU) of rhizospheric bacteria varied among tree species and treatments; petroleum stimulated bacterial CFU for S. macrophylla. The number of fungi CFU for S. macrophylla and T. rosea was significantly greater in C0 than in soil with petroleum, but among species and among different concentrations, no significant differences were found. The greatest percentage of TPH degradation was found in C1 for soil without plants (45%). Differences from the remaining treatments (petroleum concentrations in soil and plant species) were not significant (P< 0.05). Among all trees, H. campechianum had the greatest TPH degradation (32.5% in C2). T. rosea (C1) and H. campechianum (C2) resulted in petroleum degradation at levels ranging from 20.5 to 32.5%. "