In this study, the effects of organic fertilizer forms and doses on the seed germination and seedling growth of rapeseed were investigated. A study was carried out according to the Completely Randomized Experimental Design with three replications. Under liquid seaweed, germination index, radicle fresh weight, and radicle, plumule and seedling dry weights were found to be highest, while germination percentage, radicle length, plumule length, seedling length and germinated seed number proved to be the lowest. In liquid vermicompost; radicle length, plumule length, seedling length, radicle fresh weight, radicle dry weight and seedling vigor index were the highest. The liquid organic fertilizer with plant-derived amino acids proved to be the highest germination percentage value and the lowest radicle length, radicle fresh weigth, plumule fresh weight, seedling fresh weight, and radicle, plumule and seedling dry weight and seedling vigor index. The liquid vermicompost had an effect on increasing the seedling length by encouraging radicle and plumule length of the rapeseed, while liquid seaweed had negative effects on radicle and plumule length. It has been shown an effect to increase seedling fresh weight by promoting seedling growth. It was determined that the liquid organic fertilizer with plant-derived amino acids form encouraged the germination percentage of rapeseed. All tested fertilizers had an inhibitory effect on germination, on the other hand, the fertilizers promoted the seedling growth.
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