The Effect of Water Stress and Salinity on the Yield and Yield Components of Canola in the West Region of Urmia Lake Basin, Iran

Abstract

Due to the drying trend of Urmia Lake, climate change and frequent occurrence of droughts in the region. The water resources have a declining trend and soils are being saline. Consequently in order to investigate the canola yield under simultaneously existence of salinity and drought stress conditions, an experiment in the factorial from and completely randomized blocks format was designed in 3 replications and done in research field of water engineering group of Urmia University during 2012-13 year in 10 months. The water levels included 3 irrigation treatments: up to field capacity (FC), 75% of FC and 50% of FC and salinity treatment were also exerted in 3 levels: salinity of field soil (without salinity stress), 7 and 14 ds/m. The results showed that the seed yield top dry matter and the weight of 1000 seeds were decreased under water and salinity stresses condition. Naturally using more water mitigates greatly the product declines due to salinity stresses. The obtained result illustrated that dry matter with the maximum production amount of 16.9 Mgr/ ha, is more sensitive to salinity stress. Also the weight of 1000 seeds with the yield of 3.4 gr is more sensitive to the water shortage than salinity stress. The evaluations showed that the interaction and salinity has reduced impressively the canola yield

Keywords

• Canola, Salinity Stress, Urmia Lake, Water stress, Yield