The effects of planting date and seed size on phenology, yield and yield components of green broad bean (Vicia faba L.)

In order to investigate the effects of planting date and seed size on phenology, yield and yield components of Barakat cultivar of broad bean, an experiment was carried out on farm research of Gonbad Kavous University during 2011-2012. Two factors was planting dates in four levels of 5 and 19 November and 6 and 19 December and seed size (one seed weight) in four levels of 1-1.25, 1.25-1.5, 1.5-1.75 and 1.75-2 gr. The results showed that seed size only affected days from planting to 50% emergence, but all traits were affected by planting date. Number of days from planting to 50% flowering and pod setting, plant height in 50% flowering and green pod harvesting time, fresh weight of plant, number of pods/plant, number of seeds/pod and plant, fresh seed weight in plant, pod length, fresh weight of one seed, and pod fresh yield was the highest in the first planting date (6th Nov.). The maximum days from planting to 50% emergence and harvest index was belonged to last planting date (20th Dec). On the first planting date (th Nov.) pod green yield was 22.85 ton ha-1. The minimum green pod yield belonged to fourth planting date (20th Dec.) with 14.57 ton ha-1. Harvest index on planting date of thNovember was 42.97% and on 20th December was 55.7%.