Green Farming
Bi-monthly Journal
NAAS RATING : 4.38
UGC Approved Jr.No. : 45500
ISSN 0974-0775
International Journal of Applied Agricultural & Horticultural Sciences
  • 22 October, 2017
Our Mission:
Innovative Eco-Safe Agri-Horticulture Technology for Greener Environment, Global Energy & Food Security.
Vol. 8 (3) : May-June 2017 issue
Green Farming Vol. 8 (3) : 581-584 ; May-June, 2017
Application of CERES-Maize model to optimize planting window and nitrogen levels for hybrid maize under irrigated conditions of semi arid environment
G. SREENIVASa1*, P. LEELA RANIb2 and D. RAJI REDDYc3
aAgro Climate Res. Centre, ARI, bAICRP on Weed Management, Daimond Jublee Block, College of Agriculture,
cAdministrative Office, P.J. Telangana State Agricultural University, Rajendranagar - 500 030, Hyderabad (Telangana)
Designation :  
1Director *(gsreenivas2016@gmail.com), 2Senior Scientist, 3Director of Research
Subject : Environment Science and Climate Resilient Agriculture, Agro-Climate, Climate Change
Paper No. : P-6119
Total Pages : 4
Received : 07 November 2016
Revised accepted : 10 March 2017
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Citation :

G. SREENIVAS, P. LEELA RANI and D. RAJI REDDY. 2017. Application of CERES-Maize model to optimize planting window and nitrogen levels for hybrid maize under irrigated conditions of semi arid environment. Green Farming Vol. 8 (3) : 581-584 ; May-June, 2017

ABSTRACT
Successful maize cultivation requires an understanding of various management practices as well as environmental conditions that affect crop production. Sowing time is the most important non-monitory input subjected to variation due to the difference in weather at sowing time. Delay in sowing beyond a given date results in a progressive reduction in the yield since crop experiences excess moisture stress due to high rainfall, low temperature and high relative humidity during early stage. CERES-Maize model was calibrated using experimental data to evaluate the ability of CERES-Maize model to simulate the effect of planting window and nitrogen levels on growth and yield of maize (Zea mays L.) under irrigated conditions. Model validation confirmed that, model can be used as a research tool under irrigated conditions up to 21 July sowings to guide alternate ways of improving maize production in different agro climatic zones of Telangana State as the model simulation for phenology and physiological maturity was considered as excellent with NRMSE value being less than 10%. Whereas, simulation of LAI, number of grains per cob, grains m-2 and grain yield was considered as good with simulation values ranging in between 10.1 to 20%. Further calibrated model was used to identify the optimum sowing window and nitrogen level for irrigated maize using DSSAT seasonal tool using 30 years historical daily weather data from 1981 to 2010. Based on seasonal analysis, optimum sowing window for irrigated maize would be from 6 July to 27 July and optimum nitrogen would be 250 kg ha-1.
Key words :
DSSAT seasonal tool, Irrigated maize, Nitrogen levels, Planting window.