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Precise irrigation water and nitrogen management improve water and nitrogen use efficiencies under conservation agriculture in the maize‑wheat systems

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Relation http://oar.icrisat.org/12181/
https://www.nature.com/articles/s41598-023-38953-6
https://doi.org/10.1038/s41598-023-38953-6
 
Title Precise irrigation water and nitrogen management improve water and nitrogen use efficiencies under conservation agriculture in the maize‑wheat systems
 
Creator Gupta, N
Singh, Y
Jat, H S
Singh, L K
Choudhary, K M
Sidhu, H S
Gathala, M K
Jat, M L
 
Subject Wheat
Maize
Water Resources
India
 
Description 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.
 
Publisher Nature Publishing Group
 
Date 2023-07-26
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_by
 
Identifier http://oar.icrisat.org/12181/1/Scientific%20Reports_13_01-16_2023.pdf
Gupta, N and Singh, Y and Jat, H S and Singh, L K and Choudhary, K M and Sidhu, H S and Gathala, M K and Jat, M L (2023) Precise irrigation water and nitrogen management improve water and nitrogen use efficiencies under conservation agriculture in the maize‑wheat systems. Scientific Reports (TSI), 13. 01-16. ISSN 2045-2322