Different Irrigation Pressure and Filter on Emitter Clogging in Drip Phosphate Fertigation Systems

Irrigation pressures and filters have a significant influence on emitter clogging in drip fertigation systems. Exploring the anti-clogging performance of emitters at different irrigation (80, 90, 100 kPa; 40, 50, 60 kPa) (the disc filter with an aperture 125 ?m, screen 125?m, 200 ?m) can provide suitable guidance for design operation The average relative discharge (Dra), Christiansen uniformity coefficient (CU), differential pressure (DP) were analyzed to study flat (FE) labyrinth (LE). Meanwhile, scanning electron microscope energy dispersive spectrometer used observe surface morphology chemical composition substances emitters. Results showed that 90 50 kPa did not cause decrease Dra, Dra two types all great than 95.22%. When was 80 40 kPa, decreased significantly (73.48–78.71%, 81.3–83.6% FE LE). CU values greater 90% except kPa. LE those FE, indicating had better compared FE. DP reflected increase degree. interaction between imposed effect significance level p < 0.05, 0.01, respectively. process mainly affected by physical factors, generated included phosphate fertilizer, silicate, carbonate, precipitations. In conclusion, best mode fertilizer systems use ?m An appropriate combined effective reduce while saving water fertilizer.