Uniformidade de aplica??o de água e efluente de amidonaria em sistema de irriga??o por gotejamento

摘要

This study aimed to evaluate the uniformity of drip irrigation systems with application of water and cassava effluent from a facultative pond. Were determining the coefficients of variation of emitter discharge (CVq) and Christiansen uniformity (CUC). The experiment was conducted at cassava processing factory in the city of Terra Roxa/PR, were installed two systems of 66 m2, fed by one tank of 1000 L situated at 1.5 m above the ground and containing water (treatment 1 - T1) and effluent from facultative pond (treatment 2 - T2). These systems were stored and tested again after one year with water (treatment 3 - T3) and effluent from facultative pond (treatment 4 - T4), and performed thirty trials for each treatment, using the methodology of Keller & Karmeli (1975) to flow collection. According to the values of CVq and CUC obtained, there was a difference in the distribution uniformity of the irrigation system, and that T1 and T2 performed in 2012 showed better uniformity compared to the treatments T3 and T4 collected in 2013. With the extended time of use of equipment increased the possibility of clogging of the emitters, negatively influencing in irrigation uniformity.