The Effect of drought stress and plant density on vegetative and reproductive traits of rapeseed cultivars (Brassica napus L.)
In order to study the effects of drought stress and plant density on the vegetative and reproductive traits of varieties of canola، a test was conducted as re-broken plots in the form of completely random blocks design with four repetitions in Boroujerd Agricultural Research Station in the agricultural year 1388-1389. In this experiment،the drought stress was studied in three levels include unstressed، two drought stresses (in the step after rosette and before beginning flowering) and three drought stresses (in the steps after rosette، before beginning flowering and filing sheath) in the main plot and different levels of plant density in three levels 6،10،and 14 kg consumed seed in each hectare in subplot and varieties of canola،three varieties Zarfam،SLM046 and Okapy in subplots. The results obtained from variance analysis of the traits under study showed that drought stress، plant density and their interactions have significant effect on the number of seeds per pod، 1000-seed weight، seed yield، harvest index، oil percentage and oil yield of the varieties of canola. The most rate of oil percentage was obtained in unstress condition and plant density 10kg/ha in variety Zarfam that regarding more biologic yield and more seed yield، it caused increasing oil percentage، by increasing water level the oil percentage was increased.
Journal of New Finding in Agricultural, Volume:7 Issue:1, 2013
81 - 89  
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