Dicloroisocianurato in the prevention of the clogging due to the use of rusted waters in drip irrigation

Abstract

The objective of this work was to evaluate the performance of a drip irrigation system applying water with high concentration of total iron, and to evaluate the efficiency of organic chlorine to prevent emitters clogging. The system consisted of four subunits receiving the following of dichlorine treatments: (N1 = 0, N2 = 15, N3 = 30 and N4 = 45 mg L^-1 of free chlorine). The uniformity of application of water was evaluated using the coefficients of uniformity of Christiansen (CUC) and of Distribution (CUD), every 100 hours of use, for 700 hours, before and after the chlorination. Also the discharge coefficient variation (CVq) was evaluated. In the subunit with N1 there was a reduction in the values of CUC and CUD of 8,2 and 15,2%, respectively. The chlorination with dichlorine of sodium in the dosages of 15, 30 and 45 mg L^-1 prevents the blockage of the dripper.