Abstract:
Drip or Trickle irrigation system is designed to apply precise amount of water near the plant with
a certain degree of uniformity. This study was conducted at the Experimental Farm of the
Faculty of Agricultural Sciences, University of Gezira, during March, 2018. The study was
aimed to design and evaluate the hydraulic performance of drip emitters including: average
discharge (Qavg), discharge variation (Qvar %), coefficient uniformity (CU %), coefficient of
manufacture variation (CV %), distribution uniformity (DU %), statistical uniformity (Us %),
clogging (%) wetted diameter (cm) and wetted depth (cm). Three emitters type were used under
drip irrigation system namely regular gauges (RG), high compensating pressure (HCP) and low
compensating pressure (LCP). The treatments were laid out in a randomized complete block
design (RCBD) with three replications. Results showed that there were significant differences
(P≤0.05) in all tested parameters except clogging, wetted diameter and wetted depth. Discharge
variation (Qvar %) values were 12.71, 15.57 and 19.17 for RG, LCP and HCP, respectively it
consider quite good and found to be within the acceptable range. Results of coefficient of
manufacture variation (CV %) were 10.9, 27.8 and 52.7 for RG, LCP and HCP, respectively it
consider within the unacceptable range except RG type it‟s excellent. Statistical uniformity (Us
%) values were 89.1, 72.2 and 45.7 for RG, LCP and HCP, respectively it consider good,
acceptable and unacceptable, respectively. Results of coefficient of coefficient uniformity (CU
%) were 91.3, 77.7 and 56.7 for RG, LCP and HCP, respectively it consider excellent, fair and
unacceptable, respectively. Distribution uniformity (DU %) were 90.2, 67.9 and 36.5 for RG,
LCP and HCP, respectively it consider excellent, poor and poor, respectively. Thus the study
recommended regular gauges (RG) type emitters under the heavy clay soil conditions of the
Gezira State, Sudan.
