National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted at Plasticulture Farm, CTAE, MPUAT, Udaipur (Rajasthan) to calibrate and validate AquaCrop model for potato crop during rabi season from October, 2017 to February, 2018. Three levels of irrigation based on ETc at 100% ETc (I1), 80% ETc (I2), and 60% ETc (I3) were combined with no-mulch (M1) treatment as control and two mulch treatments BP mulch (M2), PPW mulch (M3) laid out with three replications in factorial randomized block design (FRBD). Part of the obtained field data i.e. data for full irrigation treatment (100% ETc under no-mulch – T1) was used for calibration of the model, while the remaining data of remaining treatments were used to validate the model. The observed and simulated canopy cover results show close match which was supported by high value of Nash Sutcliffe coefficient (R2NS) 0.90 with Coefficient of Residual Mass (CRM) having value as -0.141, which indicates that the model overestimates the canopy cover. R2NS values are found as 0.81 for biomass and 0.87 for potato yield which shows close match between observed and simulated biomass and yield, respectively. CRM was found as -0.386 and -0.480 for biomass and potato yield, respectively, which indicates that model overestimates the biomass and potato yield. AquaCrop model is considered a useful tool in predicting water productivity, biomass and yield of potato under the prevailing condition and estimation of water requirement of crop was critically essential for crop planning on farm and, for designing and monitoring the irrigation project.
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