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Gupta, N. K., Singh, Y., Jat, H., Singh, L., Choudhary, K., Sidhu, H., Gathala, M. K., & Jat, M. (2023). Precise irrigation water and nitrogen management improve water and nitrogen use efficiencies under conservation agriculture in the maize-wheat systems. Scientific Reports, 13(1), 12060. https://doi.org/10.1038/s41598-023-38953-6
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Abstract
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A 3-year field experiment was setup to address the threat of underground water depletion and sustainability of agrifood systems. Subsurface drip irrigation (SDI) system combined with nitrogen management under conservation agriculture-based (CA) maize-wheat system (MWS) effects on crop yields, irrigation water productivity (WPi), nitrogen use efficiency (NUE) and profitability. Grain yields of maize, wheat, and MWS in the SDI with 100% recommended N were significantly higher by 15.8%, 5.2% and 11.2%, respectively, than conventional furrow/flood irrigation (CT-FI) system. System irrigation water savings (~ 55%) and the mean WPi were higher in maize, wheat, and MWS under the SDI than CT-FI system. There was saving of 25% of fertilizer N in maize and MWS whereas no saving of N was observed in wheat. Net returns from MWS were significantly higher (USD 265) under SDI with 100% N (with no subsidy) than CT-FI system despite with higher cost of production. The net returns were increased by 47% when considering a subsidy of 80% on laying SDI system. Our results showed a great potential of complementing CA with SDI and N management to maximize productivity, NUE, and WPi, which may be economically beneficial and environmentally sound in MWS in Trans-IGP of South Asia.
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Journal
Scientific Reports
Journal volume
13
Journal issue
1
Article number
12060
Place of Publication
London (United Kingdom)
Publisher
Nature Publishing Group
Donor or Funder
Indian Council of Agricultural Research (ICAR)
CGIAR Trust Fund
CGIAR Trust Fund
Related Datasets
CGIAR
Initiative
Excellence in Agronomy
Transforming Agrifood Systems in South Asia
Transforming Agrifood Systems in South Asia
Impact Area
Nutrition, health & food security
Action Area
Resilient Agrifood Systems