The effect of harvesting time on seed germination indices and seedling growth of six rapeseed (Brassica napus L.) cultivars

The effect of harvesting time on seed germination and seedling growth of six rapeseed (Brassica napus L.) cultivars were evaluated in field and laboratory in 2004-05. The experiment was conducted in a complete randomized block design based on split plot layout with four replications. The seeds of rapeseed cultivars were harvested based on grain moisture content of the siliques of one third of the bottom main stem; 1) 40% and higher, 2) 30- 40% and 3) 20-30%. Standard germination test was conducted in a complete randomized block design based on split plot layout with three replications. Germinated seeds were counted daily for 7 days and germination indices were measured. Total germination, vigor index, germination index, germination rate, energy of germination and mean germination time were significantly different in harvesting times. All seed germination and seedling growth indices were higher in the third harvest and Hyola401 performed better germination indices.