Abstract
Potato seeds function as the main production medium in the plant cultivation which requires application of plant growth substances as stimulator of grow. This study aims to determine the effect of tuber weight and cytokinin immersion treatment time on breaking the dormancy period of potato tuber. This research was carried out at the seed warehouse of UPT Benih Induk Hortikultura Kutagadung Berastagi. This research was conducted using factorial completely randomized design, with 2 factors. The first factor, the weight of potato tubers of 4 levels and the second factor, cytokinin immersion time of 5 levels. The results showed that the fastest dormancy breaking was on the 45 DAH immersion i.e. 61.75 days, 12.58 days faster than without immersion, or 6.42 days faster than the 1 DAH immersion treatment. The fastest dormancy breaking is in potato tuber weighing 115-125 g (60.07 days), 13.47 days faster than tuber weighing 25-35 g. The fastest dormancy breaking was at B4W4 treatment (55 days). The number and weight of sprouts increases with increasing immersion time, and with increasing tuber weight.
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