Study of the ability of the Swietenia mahagoni seedlings on remove of wastewater pollutants and bio-fertilization effect on growth and chemical constituents

Abstract

Pot experiment was carried out at the Screen of National Research Centre, Cairo, Egypt during the two successive seasons of 2014 and 2015. This study aims to find out the effect of bio-fertilizers (phosphorien, microbien, nitrobien and potassiummage at 10 g / pot) on growth and chemical constituents of Swietenia mahagoni plants on remove of wastewater pollutants. The results showed that application of microbien alone gave the highest values of plant height, number of leaves, stem diameter, fresh and dry weight of stems, while the highest values of root length, fresh and dry weight of leaves and roots were obtained when plants treated with nitrobien compared with other bio-fertilizers and control plants. The effect of interaction between bio-fertilizers and irrigation of wastewater, these results mentioned that treating plants with microbien and wastewater irrigation significantly increased plant height, number of leaves, stem diameter, fresh and dry weight of leaves and stems, while application of nitrobien with wastewater irrigation significantly increased root length, fresh and dry weight of roots. Concerning the effect of bio-fertilizers on chemical constituents, these results found that application of microbien gave the highest values of Zn, Pb in leaves and stems and carbohydrates percentage in stems. The highest values of Zn, Pb, Cd in the roots, N, P, K in the leaves, stems and roots, chlorophyll a, b, carotenoids in leaves and carbohydrates percentage in leaves and roots were obtained when plants treating with nitrobien compared with other bio-fertilizers and control plants, while application of potassiummage gave the highest values of Cd in leaves and stems. Using microbien with wastewater irrigation led to increase Zn, Pb, Cd in leaves and stems and Pb in roots. Also, increase N, P, K in leaves, stems and roots and chl. a, b and carotenoids in leaves, while application of nitrobien gave the highest values of Zn, Cd and carbohydrates percentage in roots.Whilst, irrigation with wastewater gave the highest values of all parameters and chemical constituents compared with tap water.