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<p>Seed tubers supplied by growers from diffused-light stores vary in quality depending on variety and pre-harvest nutrient management practices. This study was therefore carried out to evaluate the biophysical and physiological ageing characteristics of seed tubers of three potato varieties (Gera, Shenkolla, and Belete) produced under different phosphorus (P) and potassium (K) management practices and stored under diffused-light storage (DLS). The experiment was conducted in 2021/2022 and 2023/2024, using a randomised complete block design, with seed tubers of the potato varieties produced under the combined application of four levels of P (0, 8.5,17, 34&#xa0;kg P&#xa0;per ha) and K (0, 85,170, 340&#xa0;kg K<sub>2</sub>O&#xa0;per ha). Analysis of variance revealed no significant interaction effect (p &gt; 0.05) between variety and fertility management in either year. However, cultivar, phosphorus, and potassium affected biophysical and physiological ageing characteristics of seed tubers. The potato variety Shenkolla had shorter dormancy periods, greater weight loss than Gera, and more vigorous sprouts than Belete and Gera in both years. Increasing P levels tended to increase only the dormancy period, and seeds obtained from half (17&#xa0;kg&#xa0;ha<sup>−1</sup>) of the recommended P remarkably prolonged dormancy during the first year. In contrast, increased K levels decreased dormancy, peak sprout growth periods, and sprout dry matter content in the same year. Despite the effect of seasonal variation, the study demonstrated that potato varieties and pre-harvest nutrient management practices are critical factors in determining the quality of potato seed tubers under DLS conditions.</p>

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Effect of Variety and Pre-harvest Phosphorus and Potassium Management on Potato Seed Tuber Performance under Diffused-Light Storage

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Damtew Aragaw Amare,
  • Deribew Belew Yohannes,
  • Tesfaye Abebe Desta

摘要

Seed tubers supplied by growers from diffused-light stores vary in quality depending on variety and pre-harvest nutrient management practices. This study was therefore carried out to evaluate the biophysical and physiological ageing characteristics of seed tubers of three potato varieties (Gera, Shenkolla, and Belete) produced under different phosphorus (P) and potassium (K) management practices and stored under diffused-light storage (DLS). The experiment was conducted in 2021/2022 and 2023/2024, using a randomised complete block design, with seed tubers of the potato varieties produced under the combined application of four levels of P (0, 8.5,17, 34 kg P per ha) and K (0, 85,170, 340 kg K2O per ha). Analysis of variance revealed no significant interaction effect (p > 0.05) between variety and fertility management in either year. However, cultivar, phosphorus, and potassium affected biophysical and physiological ageing characteristics of seed tubers. The potato variety Shenkolla had shorter dormancy periods, greater weight loss than Gera, and more vigorous sprouts than Belete and Gera in both years. Increasing P levels tended to increase only the dormancy period, and seeds obtained from half (17 kg ha−1) of the recommended P remarkably prolonged dormancy during the first year. In contrast, increased K levels decreased dormancy, peak sprout growth periods, and sprout dry matter content in the same year. Despite the effect of seasonal variation, the study demonstrated that potato varieties and pre-harvest nutrient management practices are critical factors in determining the quality of potato seed tubers under DLS conditions.