Effectes of seedrate and planting method on yield and yield components of rapeseed (Brassica napus L.)

In order to determine the best planting pattern and optimum plant density of rapeseed, an experiment was carried out in two years 2006 and 2007 at Agricultural Research Station of Varamin. The experiment was a split-plot design on randomized complete block basis with four replications. The main plots included four planting methods (one row on furrow with 60 cm width, two rows on furrow with 60 cm width, two rows on furrow with 50 cm width and one row on furrow with 50 cm width) and the sub plots included three seed rates (6, 8 and 10 kg/ha-1). The results of combined analysis showed that effect of planting pattern was significant on characteristic such as day to flowering, number of pod per plant, number of seed per pod, duration of flowering and oil percent and the effect of seed rates was significant on plant height, 1000 seed weight and seed yield. The effect of interaction between planting pattern and seed rates was significant on day to germination, day to maturity, number of pod per plant and 1000 seed weight. The results of mean comparison analysis indicated that planting method of one row on furrow with 60 cm width produced the highest day to flowering terminate, number of pod per plant, number of seed per pod, duration of flowering and oil percent. Application of 6kgha-1 seed rate produced the highest 1000 seed weight and seed yield. Generally, the resulte of this experiment showed that the highest valuse of most characteristic were obtained from application of 6kgha-1 seed rate and planting method of one row on furrow with 60 cm width.