Work

Modelling the response of paddy water balance on groundwater level fluctuations in Central Punjab

Year: 2020

Type: article

Abstract: The present study employs a process-based DSSAT (Decision Support System for Agrotechnology Transfer) model for estimating agriculture water use and its evaluation for simulating groundwater fluctuations. A field experiment was performed during kharif season with PR 121 variety (rice) at Punjab Agricultural University, Ludhiana. There were six treatments with three dates of transplanting – June 5 (D1), June 20 (D2) and July 5 (D3), one cultivar – PR121 (V) and two irrigation regimes – 2-day drainage (I1) and tensiometer-based (I2). Both simulation and experimental results showed that paddy transplanted on June 20 (D2) and tensiometer-based irrigation treatment (I2) gave 23 and 32% higher yield in comparison to June 5 (D1) and July 5 (D3) with maximum water use efficiency of 1.69 kg/m3. The validated DSSAT model was simulated for a historical time slice (1998–2014) and indicated that 66% of applied water in the form of rainfall or irrigation in paddy fields was lost as drainage component. The simulated change in storage (rainfall minus evapotranspiration) was able to explain groundwater level fluctuations in terms of trends/magnitude in most of the years.

Source: Journal of Hydroinformatics

DOI: 10.2166/hydro.2020.058

Authors: Samanpreet Kaur, Ramandeep Singh, Bharat Bhusan Vashisht, K. K. Gill, Rajan Aggarwal

Institution: Punjab Agricultural University

Language: English

Topic: Rice Cultivation and Yield Improvement

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDGs: Clean water and sanitation, Zero hunger

Open Access status: bronze

Funder: Indian Council of Agricultural Research