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Calibration and Validation of Reproductive Stages of Wheat Varieties with CERES-Model under Sowing Environments in Irrigated Conditions of Jammu, India

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Title Calibration and Validation of Reproductive Stages of Wheat Varieties with CERES-Model under Sowing Environments in Irrigated Conditions of Jammu, India
 
Creator Gupta, Vikas
Gupta, Meenakshi
Sandhu, S S
Singh, Mahender
Bharat, Rajeev
Kour, Sarabdeep
Sood, K K
Gupta, Moni
Singh, A P
 
Subject DSSAT 4.6
Heat stress
Nitrogen levels
Phenology
Thermal indices
 
Description 1058-1065
Impact of heat stress during March and April months have significant reflections on the occurrence of phenological
stages of wheat. The current investigation aimed to analyze the impact of three varieties of wheat planted in three different
environments (dates of sowing) and three levels of nitrogen to study their effects with respect to the occurrence of
reproductive stages. Field experiments were conducted with three wheat varieties viz., HD 2967, RSP 561 and WH 1105,
which were sown in 3 sowing environments/dates, viz., 25th October-early, 14th November-normal and 4th December-late
and 3 levels of nitrogen, viz., 100, 125 and 150 kg/ha randomized in 3 replications under a split-split plot design in
rabi season 2015–16 and 2016–17. The experiment was sown at the Agromet Research Farm of Sher-e-Kashmir University
of Agricultural Sciences and Technology of Jammu (SKUAST-J), Chatha. Experimental conditions and results obtained
from the experiments were used as a database for calibration of Crop Environment Resource Synthesis (CERES)-a Wheat
model under Decision Support System for Agrotechnology Transfer (DSSAT) version 4.6 package for studying the effects of
changing climatic conditions on wheat phenology. The varietal specific genetic coefficients were calibrated and validated for all
the 3 wheat varieties. On comparison of the results obtained from the calibration and validation data of various wheat varieties;
the researchers came to a very good and valid conclusion to predict the days of occurrence of various phenological stages of
wheat. The parametres R2, d-stat, RMSE and nRMSE were used for comparing CERES-Wheat model results with the actual
data and the values were excellent.
 
Date 2024-10-21T10:38:22Z
2024-10-21T10:38:22Z
2024-10
 
Type Article
 
Identifier 0022-4456 (Print); 0975-1084 (Online)
http://nopr.niscpr.res.in/handle/123456789/64729
https://doi.org/10.56042/jsir.v83i10.5668
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source JSIR Vol.83(10) [October 2024]