Abstract :
To evaluate the effects of meteorological factors on yield and yield components of winter rain-fed canola cv. Hyola, 20 fields were selected in Kalaleh Region, Golestan province, Iran. In addition to recording the dates of phenological stages during growth period, the traits grain yield and yield components were measured after harvest. The meteorological parameters including minimum and maximum daily temperature, minimum and maximum daily relative humidity, daily evaporation and daily precipitation supplied by Agriculture Meteorology Station of Kalaleh were estimated for the growth stages of planting-flowering, flowering-podding and podding-maturity. The results showed that grain yield had the highest negative and significant correlation with days from planting to maturity and flowering-podding (-0.549* and -0.522*, respectively) and with received growing degree days (GDDs) during growth period as well as during flowering-podding (-0.511* and -0.508*, respectively). Higher daily evaporation (-0.551*) and GDD (-0.496*) from podding to maturity significantly decreased final plant density. Among all components, grain yield had significant correlation just with pod number/plant (0.520*). Higher day (0.504*)/night (0.531*) temperature during growth period, especially during podding-maturity period (0.502*) was accompanied with an increase in grain number/pod, while longer planting-podding period decreased this component of canola yield (-0.507*).
