Effects of wastewater sludge on growth of rape (Brassica napus) | Abstract
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Effects of wastewater sludge on growth of rape (Brassica napus)

Author(s): Nesrin Orcen, Gholamreza Nazarian, Shiva Sadighfard, Mahmut Tepecik and Esref Irget

In this studythe responses growth parameters of rape (Brassica napus)were analyzed in soils mixed with sewage sludge of leather industry wastewater. A pot experiment was conducted with six different mixture rates (0, 1, 5, 10, 15, 20% w/w) ofsoil and sewage sludge which was used as growing medium forTassilo cultivars of rape (Brassica napus). The plants grown in pots which containing only soil were used as control group. The average germination percentage showed decrease depending on the increasing sludge amounts. Significant differences was found in the biomass of roots, stems, and the leaves number with respect to increasing rate of sludge, except for RWC (relative water content). Although the increase in growth parameters was seen generally in all portion media, the increase rate up to 10% was remarkable compared with other combinations.The negative impact of chromium which is the most important pollutant in the leather industry waste sludge was not observed on the growth of rape. Although germination percentage of rape in soil with mixed waste sludge was slightly lower compared to the control, it would be a good choice to be used for phytoremediation as there was no decrease in the growth parameters of plant. With the ability to create more biomass it can be an option available for cleaning up such soils