The Effect of Irrigation Water Amount on Water-Yield Relationships of Eggplant

The aim of this study is to determine the effect of different levels of irrigation water applied by drip irrigation method on yield, water requirement, and water-yield relationship of eggplant (solanum melongena). in the study, irrigation treatments were formed as 100% (i100, control), 80% (i80), 60% (i60), 40 % (i40) of evaporation from class a pan evaporating. irrigation was applied when the amount of water evaporating from the class a pan was greater than or equal to 40 mm. the variety of eggplant karnaz was used as plant material. the experiment was carried out using randomized block design with 3 replications, and drip irrigation method was used. in the experiment, the amount of water applied in the treatment i100 was 305 mm and the plant water consumption 447 mm. the minimum water (122 mm) applied to i40 irrigation treatment with the most water scarcity and consumption was determined as 264 mm. the highest eggplant yield (3693 kg /da) was at i100 irrigation treatment, the lowest yield (2999 kg /da) was at i40 irrigation water treatment. irrigation water us efficiency and water use efficiency change according to irrigation levels. in general, as the amount of irrigation water increased the water and irrigation water use efficiency decreased. the highest irrigation water use efficiency and the highest water use efficiency were obtained from i40 irrigation treatment (iwue, 24.58 kg mm-1) (wue, 11.36 kg mm-1). the relation between yield and irrigation water and water use were determined as y = 3.93i + 2468.5 and y = 5et + 1904 respectively. the yield response factor (ky) was found as 0.5.