Potato growth in humid climate regions is facing increasing challenges due to short period stresses in water deficit and excess. However, there is a lack of quantitative information on the effects of short period of water stress on potato plant growth and its implications on potato yield and tuber quality. In this study, we conducted a pot experiment to test the effects of short period (2 weeks) of water deficit and water excess, respectively, applied at four different potato growth stages (sprouting, vegetative, tuberization and bulking stage) on potato vegetative development and tuber yield and quality. The results show that short period of water deficit overall had negative impacts while short period of water excess had slightly positive impacts on potato vegetative development and tuber yield and quality. For water deficit, the most sensitive periods were the vegetative and tuberization stage whereas for water excess, there were mostly no-significant differences between different potato growth stages. Although the impact of water deficit at the sprouting stage was minor, it was broad and long-lasting. These results confirm the benefits of supplemental irrigation and suggest the low risk of over-irrigation in well drained fields. They further suggest that when the availability of water for irrigation is limited, using water strategically during the period when potato needs water the most can maximize the benefits of supplemental irrigation.

由于缺水和过量的短期压力，潮湿气候地区的马铃薯生长面临越来越大的挑战。但是，缺乏有关短期水分胁迫对马铃薯植株生长的影响及其对马铃薯产量和块茎质量的影响的定量信息。在这项研究中，我们进行了盆栽试验，分别测试了在四个不同的马铃薯生长阶段（发芽，营养，块茎和膨大阶段）施用的短期缺水（2周）和水分过量对马铃薯营养发育的影响块茎的产量和品质。结果表明，短期缺水总体上对马铃薯营养生长和块茎产量与品质有负面影响，而短期缺水对马铃薯的营养发育和块茎产量与品质有轻微的正面影响。对于缺水，最敏感的时期是植物生长和块茎化时期，而对于水分过量而言，不同马铃薯生长阶段之间的差异几乎没有。尽管水分缺乏对发芽阶段的影响很小，但它是广泛而持久的。这些结果证实了补充灌溉的好处，并表明排水良好的田地过度灌溉的风险较低。他们进一步建议，当灌溉用水有限时，在马铃薯最需水的时期内有策略地使用水可以使补充灌溉的收益最大化。它是广泛而持久的。这些结果证实了补充灌溉的好处，并表明排水良好的田地过度灌溉的风险较低。他们进一步建议，当灌溉用水有限时，在马铃薯最需水的时期内有策略地使用水可以最大程度地增加补充灌溉的收益。它是广泛而持久的。这些结果证实了补充灌溉的好处，并表明排水良好的田地过度灌溉的风险较低。他们进一步建议，当灌溉用水有限时，在马铃薯最需水的时期内有策略地使用水可以最大程度地增加补充灌溉的收益。