عنوان مقاله [English]
This research was carried out to investigate the effect of different potato sowing pattern on yield and water productivity under sprinkler and drip irrigation system during 2012 to 2014. The study was carried out as split plot based on randomized complete block design with three replications at Ekbatan Station, Agricultural Research Station and Agricultural and Natural Resources Research Center of Hamadan Province. Two irrigation methods ( sprinkler and drip irrigation system) as main plots and 4 sowing patterns as sub- plots including: conventional method with spacing of 75 cm, two-row planting on combined hill with spacing of 75, 60 or 50 cm were evaluated. Comparison of the combined mean of the results showed that all three sowing patterns with wide hill (two row planting with 75, 60 and 50 cm spacing) with 40.96, 42.67 and 41.75 t / ha respectively are located in higher statistical group than conventional planting with 40.50 t. ha-1. There was a significant difference between yield, water productivity, Seedling emergence and plant overlapping time in two irrigation systems. Water productivity in drip irrigation was 34.4% higher than sprinkler irrigation system. Using the sprinkler irrigation system with wide hill increased water productivity relative the conventional cultivation of potatoes. While the water productivity in conventional sowing pattern in drip irrigation method was higher than the two-row sowing pattern with combined hill (wide hill). Also, the results of this research showed that using of strip drip irrigation can provide better conditions for Seedling emergence and faster plant growth and Compensate part of the lost planting date for late cultivated plants.