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Water budgeting in conservation agriculture-based sub-surface drip irrigation in tropical maize using HYDRUS-2D in South Asia

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Title Water budgeting in conservation agriculture-based sub-surface drip irrigation in tropical maize using HYDRUS-2D in South Asia
 
Creator Patra, Kiranmoy
Parihar, Chiter Mal
Nayak, Hari Sankar
Rana, Biswajit
Singh, Vinod K
Jat, Shankar Lal
Panwar, Sanjeev
Prihar, Muli D
Singh, Love Kumar
Sidhu, Harminder S.
Gerard, Bruno
Jat, Mangi Lal
 
Subject climate change
agriculture
food security
conservation agriculture
 
Description In water scarce regions of South Asia, diversification of rice with maize is being advocated towards sustainability of cereal-based cropping systems. Adoption of innovative agronomic management practices, i.e., conservation agriculture (CA) and sub-surface drip irrigation (SSDI) are considered as key strategies for much needed interventions to address the challenges of water scarcity under projected climate change. Benefits from CA and SSDI concerning water economy are well-established, however, information about their complementarity and water budgeting in cereal-based systems are lacking. A field study was conducted with process-based model (HYDRUS-2D) to understand water transport, root water uptake and components of soil water balance in maize grown in rotation with wheat after five years of continuous adoption of conservation agriculture. In this study, altogether eight treatments comprising of 6 CA+ treatments (CA coupled with SSDI); permanent beds using sub-surface drip (PB-SSD) with (WR) and without (WOR) crop residue at different N rates, 0, 120 and 150 kg N ha−1 were compared with CA (PB using furrow irrigation-FI with crop residue-120 kg N ha−1) and conventional tillage practices (CT) (CT using FI without crop residue-120 kg N ha−1). Results showed that the model could simulate the daily changes in profile soil water content with reasonable accuracy in all the treatments. Simulated soil water balance indicated higher cumulative root water uptake (CRWU), lower cumulative evaporation (CE) and higher soil water retention in CA+ (PB-SSD+ crop residue at 150 and 120 kg N ha−1) than CA and CT plots. Hydrus-2D model efficiency > 0, RMSE between 0.009–0.026 and R2 value between 0.80–0.92 at P 
 
Date 2021-08-18
2021-11-25T18:54:55Z
2021-11-25T18:54:55Z
 
Type Journal Article
 
Identifier Patra K, Parihar CM, Nayak HS, Rana B, Singh VK, Jat SL, Panwar S, Prihar MD, Singh LK, Sidhu HS, Gerard B, Jat ML. 2021. Water budgeting in conservation agriculture-based sub-surface drip irrigation in tropical maize using HYDRUS-2D in South Asia. Scientific Reports 11:16770.
2045-2322
https://hdl.handle.net/10568/116306
https://doi.org/10.1038/s41598-021-93866-6
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 16770
 
Source Scientific Reports