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<p>Selenium is an essential trace element for human health, and its deficiency may lead to various diseases. Consuming selenium-rich vegetables represents an effective approach to enhance selenium intake. This study investigated the effects of different selenium fertilizer doses (0, 4, 8, 12, and 16&#xa0;mg/kg) on agronomic traits, nutritional quality, yield, and selenium accumulation in the sweet potato variety Guishu 10. The objective was to identify the most suitable selenium application level for this variety and provide scientific support for selenium-rich sweet potato production. Results demonstrated that exogenous selenium application increased branch number per plant, maximum vine length, and tuber number per plant, while promoting nutrient uptake and consequently enhancing yield (by 26%). The contents of soluble sugars and starch increased, whereas reducing sugars and protein decreased. Furthermore, selenium fertilization significantly elevated selenium concentrations in different plant parts, showing a consistent distribution pattern across all selenium doses: tuber &gt; stem &gt; leaf &gt; fibrous root, indicating tubers’ strong capacity for selenium accumulation. These findings confirm that selenium fertilizer dosage significantly influences selenium accumulation in sweet potatoes. Within the experimental dose range examined in this study (0–16&#xa0;mg/kg), the 16&#xa0;mg/kg selenium application demonstrated optimal performance in improving soil fertility, promoting plant growth, enhancing quality parameters, and increasing yield.</p>

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The impact of selenium fertilizer application on the yield, quality, and selenium accumulation characteristics of sweet potato

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Huifeng Li,
  • Yixuan Zhang,
  • Yanqing Li,
  • Yongmei Huang,
  • Jingfeng Hua,
  • Jie Yin,
  • Dong Xiao,
  • Tianyuan Chen

摘要

Selenium is an essential trace element for human health, and its deficiency may lead to various diseases. Consuming selenium-rich vegetables represents an effective approach to enhance selenium intake. This study investigated the effects of different selenium fertilizer doses (0, 4, 8, 12, and 16 mg/kg) on agronomic traits, nutritional quality, yield, and selenium accumulation in the sweet potato variety Guishu 10. The objective was to identify the most suitable selenium application level for this variety and provide scientific support for selenium-rich sweet potato production. Results demonstrated that exogenous selenium application increased branch number per plant, maximum vine length, and tuber number per plant, while promoting nutrient uptake and consequently enhancing yield (by 26%). The contents of soluble sugars and starch increased, whereas reducing sugars and protein decreased. Furthermore, selenium fertilization significantly elevated selenium concentrations in different plant parts, showing a consistent distribution pattern across all selenium doses: tuber > stem > leaf > fibrous root, indicating tubers’ strong capacity for selenium accumulation. These findings confirm that selenium fertilizer dosage significantly influences selenium accumulation in sweet potatoes. Within the experimental dose range examined in this study (0–16 mg/kg), the 16 mg/kg selenium application demonstrated optimal performance in improving soil fertility, promoting plant growth, enhancing quality parameters, and increasing yield.