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<p>Potassium deficiency in soils severely limits wheat growth, yield, and nutrient use efficiency in intensive cereal-based systems. Conventional fertilization practices often result in nutrient imbalances, low fertilizer-use efficiency, and environmental concerns. This study evaluated the effectiveness of integrated potassium fertilization combining inorganic and organic sources in improving wheat productivity, nutrient use efficiency, and sustainability under a corn–wheat rotation. A two-year field experiment was conducted at the Indian Agricultural Research Institute, New Delhi, using wheat variety HD-2967 in a randomized complete block design with seven K application treatments. The integrated treatment T<sub>7</sub>, receiving 90&#xa0;kg K ha⁻¹ (60&#xa0;kg through muriate of potash and 30&#xa0;kg through farmyard manure), significantly enhanced leaf area index, crop growth rate, net assimilation rate, SPAD value, and root traits compared to the control. Potassium accumulation in roots (27.49–34.32&#xa0;mg g⁻¹) and shoots (132.0–132.8&#xa0;mg g⁻¹) was maximized under T<sub>7</sub>. Yield attributes, grain yield (5.39–5.49 t ha⁻¹), biological yield (13.59–14.47 t ha⁻¹), nutrient use efficiency indices, economic returns, and system productivity were also highest under integrated potassium management, while maize equivalent yield remained lowest under potassium omission. Integrated potassium fertilization at 90&#xa0;kg K ha⁻¹ significantly improves wheat productivity, nitrogen use efficiency, and system sustainability by enhancing nutrient acquisition and utilization, making it a viable nutrient management strategy for wheat under corn–wheat cropping systems.</p>

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Enhancing Wheat Growth, Yield, and Nutrient Use Efficiency through Integrated Potassium Fertilization in Corn-Wheat Rotations

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Sanjeev Kumar,
  • Dileep Kumar,
  • Shiva Dhar,
  • Sudhir Kumar,
  • Mahendra Vikram Singh rajawat,
  • Mohammad Hashim

摘要

Potassium deficiency in soils severely limits wheat growth, yield, and nutrient use efficiency in intensive cereal-based systems. Conventional fertilization practices often result in nutrient imbalances, low fertilizer-use efficiency, and environmental concerns. This study evaluated the effectiveness of integrated potassium fertilization combining inorganic and organic sources in improving wheat productivity, nutrient use efficiency, and sustainability under a corn–wheat rotation. A two-year field experiment was conducted at the Indian Agricultural Research Institute, New Delhi, using wheat variety HD-2967 in a randomized complete block design with seven K application treatments. The integrated treatment T7, receiving 90 kg K ha⁻¹ (60 kg through muriate of potash and 30 kg through farmyard manure), significantly enhanced leaf area index, crop growth rate, net assimilation rate, SPAD value, and root traits compared to the control. Potassium accumulation in roots (27.49–34.32 mg g⁻¹) and shoots (132.0–132.8 mg g⁻¹) was maximized under T7. Yield attributes, grain yield (5.39–5.49 t ha⁻¹), biological yield (13.59–14.47 t ha⁻¹), nutrient use efficiency indices, economic returns, and system productivity were also highest under integrated potassium management, while maize equivalent yield remained lowest under potassium omission. Integrated potassium fertilization at 90 kg K ha⁻¹ significantly improves wheat productivity, nitrogen use efficiency, and system sustainability by enhancing nutrient acquisition and utilization, making it a viable nutrient management strategy for wheat under corn–wheat cropping systems.