The Effect of Using Treated Wastewater With Different Irrigation Methods on Silage Maize Macro-Micro Element and Heavy Metal Accumulation

Abstract

This study was carried out in Van (Turkey) province, has semi-arid climate in 2015 and 2016. In the study, it was aimed to determine the macro micro nutrient element and heavy metal content changes in silage maize by comparing the wastewater (AS) applications with different irrigation methods [Subsurface drip (SSDI), surface drip (SDI), traditional furrow (FI)] and irrigation levels [full irrigation (% 100; K0), % 33 deficit (K1) and % 67 (K2) deficit] with clean water (TS). In treated wastewater applications, increases in the N, P, K, Ca, Mg, B, and Fe contents of the plant were increased by about 28%, 28%, 26%, 12%, 47%, 23% and 24% respectively. In heavy metal contents (Cu, Mn, Zn, Pb, Cd, Cr and Ni), changes between 75% and 770% were observed. Moreover, in all three irrigation methods, the micro-trace element accumulation order in the plant was realized as Fe> Mn> Zn> B> Cu> Cr> Pb> Ni> Cd. Along with the irrigation water limited, macro and micro element contents in plants have decreased. At the end of the study, it was concluded that nutrient supplements can be added to silage maize with treated wastewater, and can be safely used as an alternative source of irrigation water in regions where irrigation water is insufficient.