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<p>Over-irrigation and fertilization as well as the resulting low water use efficiency (WUE) and fertilizer use efficiency (FUE) have become major constraints on global crop production. A 2-year field experiment explored the effects of a soil conditioner combined with different irrigation and fertilization regimes on potato performance. The design included two sets of treatments varying irrigation frequency (6-, 8-, 10-day intervals) with either reduced fertilization (70–100% of conventional rate) or reduced irrigation (70–100% of conventional amount), both with and without a conditioner. Results showed that high-frequency irrigation (6-day interval) consistently optimized tuber yield (TY), WUE, and FUE. Conditioner application with 100% water and fertilizer inputs significantly enhanced plant growth, nutrient uptake, and soil nutrient storage compared to conventional practice. Notably, applying the conditioner with 15–30% reductions in water or fertilizer (e.g., 85% fertilization, 70% irrigation) significantly increased TY, quality, WUE, FUE, and economic benefits over the conventional full-rate practice without conditioner. Redundancy analysis revealed that soil nitrate nitrogen (SNN) and available potassium (SAP) storage were the primary drivers for enhancing tuber yield, quality, and resource efficiency in the fertilization experiment, while soil total nitrogen storage (STN), available potassium storage (SAK), and available phosphorus storage (SAP) were the key drivers in the irrigation experiment. TOPSIS analysis identified high-frequency irrigation combined with conditioner at 70–100% irrigation or fertilization as the optimal strategy. This study provides a scientific basis for sustainable potato production in similar environments.</p>

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Optimizing Water and Fertilizer Management with Soil Conditioner Enhances Potato Productivity and Resource Use Efficiency under High-Frequency Drip Irrigation

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Hongfeng Ding,
  • Jinghan Yang,
  • Yinuo Hu,
  • Zhanwen Gao,
  • Xiaoming Tian

摘要

Over-irrigation and fertilization as well as the resulting low water use efficiency (WUE) and fertilizer use efficiency (FUE) have become major constraints on global crop production. A 2-year field experiment explored the effects of a soil conditioner combined with different irrigation and fertilization regimes on potato performance. The design included two sets of treatments varying irrigation frequency (6-, 8-, 10-day intervals) with either reduced fertilization (70–100% of conventional rate) or reduced irrigation (70–100% of conventional amount), both with and without a conditioner. Results showed that high-frequency irrigation (6-day interval) consistently optimized tuber yield (TY), WUE, and FUE. Conditioner application with 100% water and fertilizer inputs significantly enhanced plant growth, nutrient uptake, and soil nutrient storage compared to conventional practice. Notably, applying the conditioner with 15–30% reductions in water or fertilizer (e.g., 85% fertilization, 70% irrigation) significantly increased TY, quality, WUE, FUE, and economic benefits over the conventional full-rate practice without conditioner. Redundancy analysis revealed that soil nitrate nitrogen (SNN) and available potassium (SAP) storage were the primary drivers for enhancing tuber yield, quality, and resource efficiency in the fertilization experiment, while soil total nitrogen storage (STN), available potassium storage (SAK), and available phosphorus storage (SAP) were the key drivers in the irrigation experiment. TOPSIS analysis identified high-frequency irrigation combined with conditioner at 70–100% irrigation or fertilization as the optimal strategy. This study provides a scientific basis for sustainable potato production in similar environments.