Evaluation of DSSAT-CANEGRO model for phenology and yield attributes of sugarcane grown in different agroclimatic zones of Punjab, India

Jashandeep Singh Jashandeep Singh,P.k Kingra P.K Kingra,Barun Biswas Barun Biswas,Vikrant Singh Vikrant Singh,S.k Mishra S.K Mishra,Kuldeep Singh Kuldeep Singh

doi:10.54386/jam.v20i4.566

Abstract

DSSAT-CANEGRO model was calibrated and validated for four sugarcane cultivars planted at three dates in two agroclimatic zones of Indian Punjab. For calibration two years (2015-16 and 2016-17) data on phenological stages, growth and yield attributes of sugarcane were recorded from the field experiments conducted under All India Coordinated Research Project (AICRP) on sugarcane at Faridkotwhereas, for validation field experiments were conducted during 2017-18 at Regional Research Station (RRS) of Punjab. Faridkot representing western plain zone and Gurdaspur representing undulating plain zone. The genetic coefficients were derived separately for each cultivar. The results revealed that at Faridkot and Gurdaspur, the observed fresh cane yield was 89.8 and 98.6 (t ha-1), whereas simulated was 90.3 and 105.6 t ha-1 respectively. The mean observed days to reach physiological maturity were 297.9±14.2 at Faridkot and 298±16.5 days at Gurdaspur. Whereas, CANEGRO model simulated 305.4±17.1 and 304.3±17.4 days, respectively. The mean percent error for simulation of aerial dry biomass was 7.02 per cent at Faridkot and 11.5 per cent at Gurdaspur. For different phenological stages, growth as well as yield attributes, the maximum RMSE remained below 8.65 which confirmed the strength of the model. Different statistical procedures adopted for validation of the model proved the efficiency of the DSSAT-CANEGRO model for simulation of the crop growth and production with fair degree of accuracy.

Highlights

The field experiments were carried out at Punjab Agricultural University, Regional Research Stations Faridkot (Lat. 30°40’ N, Long. 74°44’ E and altitude 200 m amsl) and Gurdaspur (Lat. 32°40’ N, Long. 75°40’ E and altitude 241 m amsl) comprising four varieties (CoPb 91, CoJ 88, Co118 and Co238) of sugarcane planted on three planting dates (25th February, 25th March and 25th April) at both the locations during 2017-18
Previous two years (2015-16 and 2016-17) data on growth and yield attributes were collected from field experiments carried out underAICRP on sugarcane at PAU Research Station (RRS), Faridkot
The calibrated genetic coefficients used for validation are presented in Table 2.Simulations using independent data set for validation were carried out for estimated sucrose dry mass (t ha-1), aerial dry biomass (t ha-1), leaf area index and fresh cane yield (t ha-1)

Summary

Introduction

DSSAT-CANEGRO model (v 4.6) has been evaluated to simulate phenology and yield attributes of sugarcane in different agroclimatic zones of Indian Punjab, which can prove useful in decision making to improve productivity of sugarcane. Calibration of DSSAT- CANEGRO model (v 4.6) was done by running the model repeatedly until simulated phenology, growth and yield parameters reached very close to the observed values following Singh et al, (2010) and Mishra et al, (2017).

Results

Conclusion