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<p>Rational use of irrigation water and fertilisers becomes inevitable for sustaining productivity and resources. Nano-fertilisers are considered promising alternatives to chemical fertilisers to mitigate hazards. Hence, a field experiment was conducted in the winter seasons of 2019–2020 and 2020–2021 to investigate the effects of nano and conventional fertilisers combined with irrigation scheduling on potato yield, soil health, and production economics. The study was designed in a split plot with three irrigation schedules and five nutrient treatments in main and subplots, respectively, replicated thrice in sandy loam soil with low available nitrogen and zinc. The results revealed that irrigation at 15-mm cumulative pan evaporation (CPE) and 100% recommended dose of NPK fertilisers (RDF at 200:100:100&#xa0;kg&#xa0;ha<sup>−1</sup>) along with foliar sprays of nano-Zn @ 10&#xa0;ppm at 25 and 50&#xa0;days after planting excelled other treatments in enhancing potato growth, marketable yield (5.39% and 6.97% higher than 100% RDF with the same irrigation), starch content (16.66% and 16.52%) and benefit–cost ratio (2.45 and 2.35), without depleting soil fertility. Irrigation at 45-mm CPE coupled with 100% RDF maximised soil residual NPK, while Zn level was depleted irrespective of irrigation and nutrient levels. Irrigation schedules significantly impacted soil enzyme activities, but nutrient levels did not influence them. Hence, the study recommended irrigation by 15-mm CPE along with 100% RDF and nano-Zn for optimising potato productivity and profitability in alluvial plains.</p> Graphical Abstract <p></p>

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Integrated Effects of Irrigation Scheduling and Nano-Fertilizers on Potato Yield, Soil Enzymes, and Residual Fertility

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • Manimala Mahato,
  • Dhananjoy Dutta,
  • V. V. S. Jaya Krishna,
  • Anusree Paul

摘要

Rational use of irrigation water and fertilisers becomes inevitable for sustaining productivity and resources. Nano-fertilisers are considered promising alternatives to chemical fertilisers to mitigate hazards. Hence, a field experiment was conducted in the winter seasons of 2019–2020 and 2020–2021 to investigate the effects of nano and conventional fertilisers combined with irrigation scheduling on potato yield, soil health, and production economics. The study was designed in a split plot with three irrigation schedules and five nutrient treatments in main and subplots, respectively, replicated thrice in sandy loam soil with low available nitrogen and zinc. The results revealed that irrigation at 15-mm cumulative pan evaporation (CPE) and 100% recommended dose of NPK fertilisers (RDF at 200:100:100 kg ha−1) along with foliar sprays of nano-Zn @ 10 ppm at 25 and 50 days after planting excelled other treatments in enhancing potato growth, marketable yield (5.39% and 6.97% higher than 100% RDF with the same irrigation), starch content (16.66% and 16.52%) and benefit–cost ratio (2.45 and 2.35), without depleting soil fertility. Irrigation at 45-mm CPE coupled with 100% RDF maximised soil residual NPK, while Zn level was depleted irrespective of irrigation and nutrient levels. Irrigation schedules significantly impacted soil enzyme activities, but nutrient levels did not influence them. Hence, the study recommended irrigation by 15-mm CPE along with 100% RDF and nano-Zn for optimising potato productivity and profitability in alluvial plains.

Graphical Abstract