Paddy and Water Environment

, Volume 13, Issue 3, pp 281–290

Prediction of root zone water and nitrogen balance in an irrigated rice field using a simulation model

  • Ch. Jyotiprava Dash
  • A. Sarangi
  • D. K. Singh
  • A. K. Singh
  • Partha Pratim Adhikary
Article

DOI: 10.1007/s10333-014-0439-x

Cite this article as:
Jyotiprava Dash, C., Sarangi, A., Singh, D.K. et al. Paddy Water Environ (2015) 13: 281. doi:10.1007/s10333-014-0439-x

Abstract

In irrigated semi-arid regions, knowledge of groundwater recharge and nitrate leaching is essential for sustainable management of water resources. In this study, the potential recharge and nitrate leaching below the root zone of rice crop were estimated using a root zone modelling approach through simulation with HYDRUS-1D model. The field data collected for a single season were used for calibrating the model and validated for the next season. The simulated results, when compared with the measured soil water and nitrate contents at different soil depths showed good agreement between the HYDRUS-1D simulation and field data. The validated results indicated that 55.5 % of the applied water percolated below the root zone. Nitrogen balance within 120 cm deep soil profile indicated that volatilization, denitrification, plant uptake and leaching losses were 24.0, 18.9, 109.0 and 28.5 kg N ha−1, respectively. The magnitude of nitrate leaching was 23.7 % of added fertilizer. Different nitrate leaching scenarios were generated using different fertilizer application rates exceeding the optimal dose. These scenarios showed an increasing trend with increase of fertilizer rates, fitted with a second-order polynomial equation (R2 = 0.99). The equation can be used for estimation of nitrate leaching below root zone under different fertilizer input scenarios of rice grown in similar hydro-agro-climatic regions.

Keywords

Rice Nitrate leaching Groundwater HYDRUS-1D Fertilizer use scenario 

Copyright information

© The International Society of Paddy and Water Environment Engineering and Springer Japan 2014

Authors and Affiliations

  • Ch. Jyotiprava Dash
    • 1
    • 2
  • A. Sarangi
    • 1
  • D. K. Singh
    • 1
  • A. K. Singh
    • 1
    • 3
  • Partha Pratim Adhikary
    • 1
    • 2
  1. 1.Water Technology CentreIndian Agricultural Research Institute, PUSANew DelhiIndia
  2. 2.Central Soil and Water Conservation Research and Training Institute, Research CentreKoraputIndia
  3. 3.Rajmata Vijayaraje Scindia Krishi Vishwa VidyalayaGwaliorIndia