Evaluation of yield and yield components of some of faba feen (Vicia faba L.) genotypes at different sowing dates in Guilan province

The present experiment was carried out to study the effect of planting date on yield and yield componts of some faba bean genotypes in a split plot based on Complete Randomized Block Design with three replicates in Guilan province during 2014-15 growing season. The main factor was four planting dates (20 November, 19 December, 5 January and 1 March) and the split factor was six faba bean genotypes (Guilan landrace, Borojerd landrace, France, Barrakat, FILIP3 and FILIP5). The effect of planting date was significant on all of the studied traits. The effect of genotype was also significant on all traits exept of days to maturity and relative water content. Interactions of two factors were significant on seed yield, number of days to emergence, hundred seed weight, number of seeds per pod and number of pods per plant. The highest ripening time of seeds (175.22 days) was observed in the first planting date and this time in the last planting date was reduced by 42%. Due to the significant interaction of genotype by sowing date, the simple effect of genotype was investigated at each level of sowing date and it was shown that in all four sowing dates, Gilan landrace had the highest grain yield with 3208.04, 1858, 110.8, 605.2 kg ha-1, respectively. Delay in planting incrased the seed nitrogen content by 22%. According to the results of present study and due to climatic ondition, early November is considered as an appropriate time for planting faba beans in the studied area.