تأثیر بوجاری مناسب بر کیفیت بذر کلزا رقم اکاپی

According to the effect of seed size on seed quality, this study was conducted in the Seed and Plant Certification and Registration Institute (SPCRI) in 2009-10, based on completely randomized design with three replications. The two factors experiment with 8 treatments that consisted of four separated screen size (1.4, 1.6, 1.8 and 2 mm) and two levels of using and none using of gravity separator system were applied. Based on the results using of 1.6 mm sieve size accompanied to gravity separator tool is recommended for cleaning while germination percent and seedling emergence was improved and also higher seed loss percent was attained by using of screens with 1.8 and 2 mm size. Whatever lower seed loss percent was attained using 1.4 mm sieve size but percentage of seed purity was decreased which resulted in rejection at standard seed certification process. So the best treatment was related to the screen with 1.6 mm size that was standard in the aspect of physical purity and germination percent.