International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 2
First page : (1112) Last page : (1120)
Article doi: http://dx.doi.org/10.18782/2320-7051.2568
Evaluation of DSSAT Model ver 4.5 for Soybean under Varied Environmental Conditions at Pune
A. R. Tupe1*, D. W. Thawal2, A. A. Shaikh3, S. B. Kharbade4 and R. Balasubramanian5
1,2,3,4 Department of Agricultural Meteorology, College of Agriculture, Pune, India
5India Meteorology Department (IMD), Shivajinagar, Pune, India
*Corresponding Author E-mail: tupearvind@rediffmail.com
Received: 8.02.2017 | Revised: 19.02.2017 | Accepted: 20.02.2017
ABSTRACT
Field experiments were carried out at research farm of Department of Agricultural Meteorology, College of Agriculture, Pune during kharif seasons of 2012 and 2013 on the clayey soil (medium black) to study evaluation of SOYGRO model with four sowing times (I FN of June S1, II FN of June S2, I FN of July S3 and II FN of July S4) to create different set of environmental conditions for weather variability and three varieties JS-335 (V1), MACS-450 (V2) and DS-228 (V3) was laid out in split plot design (SPD) with four replications.
The evaluation of CROPGRO-soybean model performance in respect of phenological phases was found to be highly reliable. Plant height and LAI was found to be slightly overestimated except that plant height prediction was well matched for MACS-450 (V2).
The observed and predicted mean error per cent of seed yield was underestimated during both the years for all the varieties. The percentage error (PE) was 57.40, 30.27 and 21.53 in 2012 and 18.05, 12.28 and 10.23 in 2013 for varieties JS- 335 (V1), MACS-450 (V2) and DS-228 (V3), respectively, while the degree of agreement was overestimated during both the years. The prediction for seed yield was slightly overestimated for the all varieties. The comparison of observed and predicted simulated yield parameters viz., straw yield and harvest index showed that the model slightly overestimated by for all the varieties. The straw yield was mostly overestimated but it was underestimated when crop sown delayed. The model is capable of predicting the seed yield and harvest index reliably in the cultivars DS-228 (V3) and MACS-450 (V2). Seed yield was slightly overestimated in JS-335 (V1) and MACS-450 (V2).
Key words: DSSATv4.5, CROPGRO-soybean model, Evaluation, Genetic coefficient
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Tupe, A.R., Thawal, D.W., Shaikh, A.A., Kharbade, S.B. and Balasubramanian, B., Evaluation of DSSAT Model ver 4.5 for Soybean under Varied Environmental Conditions at Pune , Int. J. Pure App. Biosci.5(2): 1112-1120 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2568
