Khafagy, E. E. E.; I. S. M. Mosaad; Rania. M. El - Samet and M.A. Bayoumi( 2014). Evaluation of drainage water quality and its effects on soil properties and nutrition of plants.J. Soil Sci. and Agric. Eng., Mansoura Univ., Vol. 5 (9): 1299-1315, 2014 9911
Abstract: The present study was carried out on EL-Serw drain located between Dakahlia Governorate and Damietta Governorate to evaluate the effect of drainage water quality on chemical composition of soil and plants. EL-Serw drain passes through many villages dotted along it receiving their agricultural drainage water, domestic waste waters and industrial effluents. Water samples were seasonally collected from 6 sites along this drain (the beginning of the drain (0), 5, 10, 15, 20 and 25 km.) during June 2012 to March 2014. The main obtained results are presented as follows:
•Electrical conductivity (EC) values increased slightly with northward direction.Also, Sodium adsorption Ratio (SAR) took the same trend, the quality of studieddrainage water belong to C3 S1 and C4 S2 classes and could be reused inirrigation purpose under special management.
•Boron (B) concentration, at most of locations have low concentration (B1) < 3 mgL-1 which less than the critical limit indicating (slight to moderate for restriction onuse).
•Nitrate –N concentration was ranged from 5-30 ppm in the EL-Serw drain in twosummer season 2012 at distance 0 to5 Km. and 2014 at distance 0 to 10 Km.whereas, the other sites had higher water than the critical limits.
•Micronutrients and heavy metal ions concentrations (Fe+2, Mn2+, Zn2+ and Pb2+)were less than permissible levels at all selected water samples.
•Soil salinity and SAR values of soil increased as a result of using drainage waterand the increasing of soil pH is related to salt content in irrigation water.
•Using drainage water for irrigation, caused an increase in soil content of availablemicronutrients (Fe, Mn and Zn) whereas, heavy metals (Pb) was less than thepermissible limit (500 mg Kg-1).
•Concentrations of heavy metals and micronutrients (Fe, Mn, Zn and Pb) in strawand grains of wheat and rice grown in the most locations were under thepermissible limits except Pb and Fe concentration exceeds the critical levels in alllocations.The concentration of heavy metals and micronutrients in straw of wheatand rice crops were higher than in the grain in all locations.
•Zn and Mn concentrations were less than critical limits in all locations in shoot ofclover plants and Pb and Fe concentrations were higher than critical limit in alllocations.
•Finally, the rice crop slightly affected by water quality than wheat and finallyclover.
Keywords: (Drainage water, plant chemical composition, soil properties , heavy metals.)
