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Validation of DSSAT model in simulating nitrogen response of winter maize (Zea mays) grown under different nitrogen and phosphorus fertilization

KrishiKosh

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Title Validation of DSSAT model in simulating nitrogen response of winter maize (Zea mays) grown under different nitrogen and phosphorus fertilization
M Sc
 
Creator Epimaque NSANZABAGANWA
 
Contributor T.K. Das
 
Subject Nitrogen, phosphorus, winter maize, yield, economics, DSSAT-CERES-maize, simulation
 
Description T-8396
A field experiment was conducted at the research farm, Division of Agronomy, Indian Agricultural
Research Institute, New Delhi during winter of 210-11 under irrigated conditions. Four levels of nitrogen
(0, 80, 160 and 240 kg N ha-1) and four levels of phosphorus (0, 13.2, 26.4 and 39.6 kg P ha-1) were
studied individually and in combination. The experiment was laid out in a split plot design with three
replications. It was observed that the single cross maize hybrid HQPM-1 gave significantly higher grain
yield, net returns and B: C ratio at 240 kg N ha-1 than other levels except 160 kg N ha-1. The response to
phosphorus was significantly higher at 26.4 kg P ha-1 in terms of grain yield, net returns and B: C ratio.
The combination of 240 kg N ha-1 and 26.4 kg P ha-1 performed better than other treatment combinations
with respect of these parameters. The economic optimum doses were found to be 196.4 kg N ha-1 and
23.4 kg P ha-1 for winter maize. The required genetic coefficients for tested maize variety were generated
with the help of GenCalc program of DSSAT CERES-Maize. The simulation with CERES Maize model
results on the growth variables and yield of maize such as days to anthesis and maturity, leaf area index,
grain yield, biomass weight, stover yield, weight grain-1 and nitrogen uptake was fair simulated and
within the permissible tendency (less than 10% error) towards over and/or underestimation. It is
concluded that DSSAT CERES-Maize model can be used in predicting the growth and yield of maize as
influenced by different levels of N fertilization and could be used in wider perspective in decision making
on nitrogen management in winter maize under Delhi conditions
 
Date 2016-11-01T10:15:39Z
2016-11-01T10:15:39Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/83084
 
Format application/pdf
 
Publisher IARI, DIVISION OF AGRONOMY