The Effect of Magnetic Field and Different Levels of Irrigation Water Salinity on Emitters Discharge

Clogging of emitters is one of the problems of trickle irrigation with saline water. This study was carried out with the purpose of investigating emitters clogging in trickle irrigation using magnetized water under different salinity level. In this study two treatments of magnetized water and non-magnetized water considered were as main factors (variables) and three levels of saline water including waters with saline of 0.57, 5 and 10 dS/m and three distance including the first of lateral, middle and the end of lateral were as sub-factors. The experiment was laid out with split-split plot in a complete randomized block design with three replications at Babolsar city in 2016. In order to assess the clogging of emitters, the variations of emitter discharges and chemical analysis of water was measured and analyzed. The results showed that the effect of magnetized water on average discharge of emitters and uniformity coefficient was significant (at P≤0.05). At the end of the irrigation season, the average discharge of emitters used for the magnetized water was 7.3% higher than the non-magnetized water. Also, the uniformity coefficient of emitters used for magnetized water was 7.9% higher than non-magnetized water. For saline water of 10 dS/m, the average discharge of emitters was 4.02 L/hr at the first irrigation period and reached 3.69 L/hr at the final irrigation period, while for magnetized water, it was 4.05 L/hr at the first irrigation period and reached 3.85 L/hr at the final irrigation period. According to this research, the using magnetized water is recommended in order to decrease the emitter clogging and increase the water uniformity in the field.