| چکیده انگلیسی مقاله |
The Water Productivity (WP) of the Darbasti Irrigation System (DIS) was evaluated in Alfalfa cultivation in the Markazi Province. The evaluation included three patterns of sprinkler placement: 8x8 meter (SS-88), 8x10 meter (SS-810), and 8x12 meter (SS-812). The Distribution Uniformity (DU), Coefficient of Uniformity (CU), Application Efficiency of Low Quarter (AELQ), and WP were determined in the years 2018 and 2019, after the third (HA-3), fourth (HA-4), and fifth (HA-5) yield harvests. The results showed that the average CU in the SS-88 pattern was 84.76% in the first year and 86.34% in the second year. This pattern had the highest CU compared to the other two patterns. The DU in SS-88, SS-810, and SS-812 patterns in the first and second year was 77.3%, 79.31%, and 75.38%, 77.66%, and 70.11%, 70.88%, respectively. These results indicate very good, good, and relatively good performance in each of the patterns, respectively. Moreover, there was a significant difference at the one percent level in the AELQ between the first and second year for all three patterns. The results showed a significant difference at the level of one percent between the SS-812 model and the other two models. The WP of alfalfa was 1.84 kg/m3, 1.87 kg/m3, and 2.28 kg/m3 for SS-88, SS-810, and SS-812 patterns, respectively, in the first year. In the second year, this index was 2.43 kg/m3, 2.3 kg/m3, and 2.4 kg/m3 for the same patterns, respectively. Generally, the SS-810 pattern of sprinkler placement is a suitable choice based on performance indicators. |