Evaluation of Germination and Emergence Behaviors of Rapeseed {Brassica napus L.) Cultivars under Limited Irrigation

摘要

The effect of deficit irrigation on canola seed germination and emergence behavior was evaluated in field and laboratory. Field experiment conducted based on randomized complete block design with four replications and laboratory experiment was carriedout factorial in a form of completely randomized design with three replications. Treatments included 20 cultivars and irrigation factor (irrigation after 80 mm evaporate from pan of class A and no irrigation after stemming). The results showed that meandaily germination and final gemiination percentage were significantly affected by irrigation in laboratory tests. Also mean daily emergence, daily emergence speed, final emergence percentage (FGP) and emergence stability percentage were significantly affected by irrigation in field. Positive correlation was observed between mean daily emergence with seedling length, seedling vigor index (SVI) at standard germination test, final emergence percent and seedling stability percentage (at field). Results ofcold test displayed SVI correlated with mean emergence percentage. Furthermore final emergence percentage was con'clated positively with mean daily emergence during accelerated ageing test.