EFFECT OF DIFFERENT IRRIGATION SYSTEMS ON IRRIGATION WATER USE EFFICIENCY, GROWTH AND YIELD OF POTATO UNDER BAZIAN CLAY LOAM SOIL CONDITION

Abstract

A field experiment was conducted at Bazian Agricultural Research Center, Sulaimani governorate in clay loam soil to investigate the effect of different irrigation systems (Furrow F, Sprinkler S, Drip D, and Sub-surface drip irrigation system SD with three different depths (10cm-SD10,25cm-SD25, and 40cm-SD40) on irrigation water use efficiency, growth and yield of potato (SYLVANA c.v). Results showed that the total amount of water delivered from the source was significantly smaller for (SD25) and (SD40). Maximum water used by potato root and the higher application efficiency were observed by (SD25). There are no significant differences between (SD25) and (SD40) in irrigation water use efficiency IWUE, while the both systems were superior significantly on the other irrigation systems in this trait. (SD25) recorded the highest value and significantly dominated on other irrigation systems in many growth characteristics of potato. As well as this irrigation system (SD25) was significantly increased potato yield and the percentages of yield increase were 35.5% and 27.6% compared to (F) and (S) respectively. There were no significant differences between (SD25) and (D) in the average of tuber weight, while both treatments were superior significantly on the other irrigation systems. No significant different recorded between (S) and (F) for all growth and yield characteristics. Generally (SD25) gave better results in water use and potato production.