Effect of Complementary Irrigation on Water Productivity of European Borage (Borago officinalis) in Rasht Region

In order to study the effect of complementary irrigation on morphological and water productivity of European borage¡ an experiment was carried out in Rasht in 2013 and 2014. Three irrigation treatments including rainfed (I0)¡ one (I1) and two complementary irrigations (I2) were considered. The results of the first year with basin irrigation showed that irrigation treatments had no significant effect on all factors except of the length of flower¡ leaf numbers and main branch; for main branch and leaf numbers factors¡ there was a significant difference between I0 and I2 treatments¡ also for flower length factor¡ there was a significant difference between I0 and I1 treatments. Water productivity with I1 had the highest amount being of 0.15 kg/m3. The results of the second year with drip irrigation showed that irrigation treatments had no significant effect on all factors except of flower length¡ number of flowers and main branch¡ for the main branch factor as in the first year¡ there was a significant difference between I0 and I2 treatments; also for flower length and the number of flowers factors there was a significant difference between I1 and I0 treatments. Water productivities of I1 treatment was 0.74 kg/m3¡ being the maximum amounts.