International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (1738) Last page : (1754)
Article doi: http://dx.doi.org/10.18782/2320-7051.5631
Evaluation of CSM-CROPGRO-Cotton Model under Varied Plant Densities and Nitrogen Levels for Simulating Crop Growth, Development and Seed Cotton Yield
T. Nagender1*, D. Raji Reddy2, G. Sreenivas3, P. Leela Rani4, K. Surekha5, Akhilesh Gupta6 and P. D. Sreekanth7
1Department of Agronomy, PJTSAU, Rajendranagar, Hyderabad, India-500 030
2Director of Research, Administrative office, PJTSAU, Hyderabad, India
3Director, Agro Climate Research Centre, ARI, Hyderabad, India.
4Senior Scientist, Agronomy, AICRP on weed control, Hyderabad, India
5Principal Scientist (Soil Science) & Head, IIRR, Rajendranagar, Hyderabad
6Adviser/Scientist-G & Head,Department of Science & Technology, New Delhi, India
7Senior Scientist, Computer Applications in agriculture, NAARM, Hyderabad, India
*Corresponding Author E-mail: nagender.0753@gmail.com
Received: 30.07.2017 | Revised: 11.08.2017 | Accepted: 12.08.2017
ABSTRACT
CSM-CROPGRO-Cotton Model under DSSAT v4.6 has been extensively tested and validated in many studies, mainly in United States. The objective of this study was to test and validate this model in Telangana state of India for dynamic simulation of development, growth and seed cotton yield of two cotton cultivars (MRC 7201 and WGCV 48) under varied plant densities and nitrogen levels. The model was first calibrated with data (phenology, biomass and yield components) collected during 2015 and 2016at Rajendranagar, Hyderabad location against the best performing treatments P2N1 and P2N2 (P2: 55,555 plants ha-1, N1:120 kg N ha-1 and N1:150 kg N ha-1) in field trials. The model was then validated with data recorded against remaining seven treatmentsof 2015. Calibration of CROPGRO-Cotton model with genetic coefficients of Bt and non Bt cultivars MRC 7201 and WGCV-48 for seed cotton yield (kg ha-1) with the values of R2 were 0.96 and 0.83, RMSE were 49.7 kg ha-1 and 169.4 kg ha-1 and d-Stat were 0.98 and 0.92, respectively. Simulation of days to flowering, days from planting to physiological maturity, LAI and seed cotton yield with normalized RMSE (NRMSE) values of less than 10% across all the plant densities and nitrogen were considered excellent.Hence, there is a dire need to assess impact of climate variation on seed cotton yield under various climatic regions of Telangana state to ensure fibre quality and yield in future.
Key words: Gossypium hirsutum L., CSM-CROPGRO-Cotton, simulation, crop growth, phenology, DSSAT, Cotton cultivars.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Nagender, T., Reddy, D.R., Sreenivas, G., Rani, P.L., Surekha, K., Gupta, A. and Sreekanth, P.D., Evaluation of CSM-CROPGRO-Cotton Model under Varied Plant Densities and Nitrogen Levels for Simulating Crop Growth, Development and Seed Cotton Yield, Int. J. Pure App. Biosci. 5(4): 1738-1754 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5631
