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Aims <p>This study aimed to provide precise nitrogen (N), phosphorus (P), and potassium (K) fertilization guidance for potato production in the Western part of China’s Inner Mongolia, where imbalanced nutrient application limits yield and nutrient use efficiency.</p> Methods <p>Using data from 109 field trials spanning 2002–2023 across 3 major potato-producing regions of Western Inner Mongolia, the QUEFTS model was applied to estimate nutrient requirements by analyzing yield response, agronomic efficiency, and intrinsic efficiency parameters.</p> Results <p>Average tuber and shoot yields were 26.5 and 5.7 t·ha<sup>−1</sup> (harvest index 0.75), with total plant uptake of 137.7&#xa0;kg N, 43.6&#xa0;kg P, and 164.5&#xa0;kg&#xa0;K per hectare. Intrinsic efficiency (IE) and its reciprocal, the requirement of internal efficiency (RIE), ranged from 106.3–1162.4&#xa0;kg tuber kg<sup>−1</sup> nutrient and 0.86–9.41&#xa0;kg nutrient t<sup>−1</sup> tuber for N, 199.0–2173.9&#xa0;kg·kg<sup>−1</sup> and 0.46–5.03&#xa0;kg·t<sup>−1</sup> for P, and 69.3–455.4&#xa0;kg·kg<sup>−1</sup> and 2.20–14.44&#xa0;kg·t<sup>−1</sup> for K. Yield response correlated negatively with relative yield (<i>R</i><sup>2</sup> = 0.347–0.437), while agronomic efficiency showed a quadratic relationship (<i>R</i><sup>2</sup> = 0.460–0.657). The 2.5th percentile IE values were identified as suitable model boundaries for maximum accumulation and dilution: 178–583&#xa0;kg·kg<sup>−1</sup> for N, 420–1589&#xa0;kg·kg<sup>−1</sup> for P, and 136–417&#xa0;kg·kg<sup>−1</sup> for K. A linear nutrient uptake-yield relationship was maintained until yields reached 60%–70% of potential.</p> Conclusion <p>Producing 10,000&#xa0;kg of tubers required 29.0&#xa0;kg N, 9.1&#xa0;kg P, and 39.7&#xa0;kg&#xa0;K, respectively. Model validation confirmed effectiveness in estimating optimal nutrient uptake for target yields, supporting site-specific fertilizer recommendations.</p> Graphical Abstract <p></p>

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QUEFTS model-based estimation of potato nutrient requirements in Western Inner Mongolia: a multi-site and multi-year assessment

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Jianwei Hou,
  • Cunfang Xing,
  • Zichen Bai,
  • Jun Zhang,
  • Tingting Zhang,
  • Junmei Liang,
  • Hao An,
  • Huiqing Lan,
  • Hongyan Gao,
  • Yu Duan,
  • Ping He

摘要

Aims

This study aimed to provide precise nitrogen (N), phosphorus (P), and potassium (K) fertilization guidance for potato production in the Western part of China’s Inner Mongolia, where imbalanced nutrient application limits yield and nutrient use efficiency.

Methods

Using data from 109 field trials spanning 2002–2023 across 3 major potato-producing regions of Western Inner Mongolia, the QUEFTS model was applied to estimate nutrient requirements by analyzing yield response, agronomic efficiency, and intrinsic efficiency parameters.

Results

Average tuber and shoot yields were 26.5 and 5.7 t·ha−1 (harvest index 0.75), with total plant uptake of 137.7 kg N, 43.6 kg P, and 164.5 kg K per hectare. Intrinsic efficiency (IE) and its reciprocal, the requirement of internal efficiency (RIE), ranged from 106.3–1162.4 kg tuber kg−1 nutrient and 0.86–9.41 kg nutrient t−1 tuber for N, 199.0–2173.9 kg·kg−1 and 0.46–5.03 kg·t−1 for P, and 69.3–455.4 kg·kg−1 and 2.20–14.44 kg·t−1 for K. Yield response correlated negatively with relative yield (R2 = 0.347–0.437), while agronomic efficiency showed a quadratic relationship (R2 = 0.460–0.657). The 2.5th percentile IE values were identified as suitable model boundaries for maximum accumulation and dilution: 178–583 kg·kg−1 for N, 420–1589 kg·kg−1 for P, and 136–417 kg·kg−1 for K. A linear nutrient uptake-yield relationship was maintained until yields reached 60%–70% of potential.

Conclusion

Producing 10,000 kg of tubers required 29.0 kg N, 9.1 kg P, and 39.7 kg K, respectively. Model validation confirmed effectiveness in estimating optimal nutrient uptake for target yields, supporting site-specific fertilizer recommendations.

Graphical Abstract