The objective of this study was to assess the efficacy of pre-plant light-sprouting (chitting) on hastening the maturation of potato. Four cultivars with different maturities (‘Superior’, ‘Haryeong’, ‘Seohong’, and ‘Jayoung’) were used over three different growing seasons from 2016 to 2018. Different degrees of physiological age were obtained by exposing the seed lots of each cultivar to sprout-inducing conditions (13–15 °C temperature and 40–50% relative humidity (RH) in 11–20 μmol m⁻² s⁻¹ of diffuse light), for 0, 2–4, 6–7, and 10–11 weeks before planting. As the sprout-inducing periods increased, seeds physiologically aged, as evidenced by the increase in the percent sprouted eyes and sprout length per tuber, and the resulting stem numbers per plant. Moreover, in a longer the chitting duration, the increase in the number of stems was highly correlated with the tendency to have more tubers per plant. Physiologically aged seed significantly hastened plant growth through the decreased number of days to emergence, tuberization, and canopy development for all cultivars regardless of the growing season. The accelerated growth of shoots and tubers resulted in an increase in the harvest index, yield, and specific gravity of tubers, with no effect on second growth. However, there were practically no consistent benefits in the early-maturing cultivar Superior. That made it possible for the crop, especially medium- and late-maturing cultivars, to be harvested earlier in the short growing season environment. The magnitude of light-sprouting-induced effects depended on the chitting duration regimes, the maturities of cultivars, and the growing season environments.

中文翻译：

---

短时环境下集巢持续时间对马铃薯早熟的影响

这项研究的目的是评估种植前轻发芽（切碎）对促进马铃薯成熟的功效。在2016年至2018年的三个不同生长季节中，使用了四个成熟度不同的品种（“上等”，“ Haryeong”，“ Seohong”和“ Jayoung”）。通过暴露每个品种的种子批次，获得了不同程度的生理年龄到萌芽诱导条件（13–15°C温度和40–50％相对湿度（RH）在11–20μmolm ^-2  s ^-1中）播散前0、2-4、6-7和10-11周。随着发芽诱导期的增加，种子的生理老化，如每只块茎的发芽百分比和发芽长度的增加以及每株植物的茎数增加所证明。此外，在较长的筑巢期中，茎数的增加与每株植株具有更多块茎的趋势高度相关。通过生理老化的种子，无论生长季节如何，所有品种的出苗，块茎化和冠层发育所需的天数都大大减少，从而显着加快了植物的生长。芽和块茎的加速生长导致块茎的收获指数，产量和比重的增加，而对第二次生长没有影响。然而，在早熟的Superior中几乎没有一致的好处。这使得作物，特别是中，晚熟品种，可以在较短的生长季节环境中较早收获。发芽引起的影响的大小取决于持续时间，品种的成熟度和生长季节的环境。