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Effect of elevated CO2 on phenology and yield attributes of durum wheat in field trial
Bhimsen Chaulagain

Last modified: 2017-08-31

Abstract


An experiment was carried out at University of Hohenheim in 2014 to study the response of elevated CO2 on phenology, yield and yield attributes of durum wheat genotypes in Germany. Free Air CO2 Enrichment (FACE) experiment was set up at Heidfeldhof, University of Hohenheim, Germany. The experiment was laid out in RCBD with 3 replications. 5/5 samples each for Miradoux and Duramant were taken from FACE, Control and ambient for data analysis. CO2 fumigation was done from tillering stage upto senescence stage of wheat. FACE, control and ambient were 3 levels of CO2 treatment for wheat. Ambient plots did not receive any fumigation. In FACE experiment received highest CO2 fumigation upto 600ppm whereas in control, fumigation reaches 450ppm while ambient plots grew on atmospheric CO2 (400ppm).  Wheat was sown on 10th March 2014 with row spacing of 15 cm. Fertilization was done with Urea Ammonium Nitrate 28 (N-28%). Total nitrogen applied was 77kg/ha in three split doses. Harvesting of crops was done on 25th July 2014 from mini-plot of 0.675 m2 (1.5x0.45) areas from each plot. The statistical analysis of data was performed using SAS software and Microsoft Office Excel 2007. No interaction of CO2 and genotype, CO2 level was found. Lower fertilization, dryness in early days of experiment and higher temperature followed by less precipitation in heading and fruit development gave lower yield. Proper nutrient management coupled with adequate soil moisture could perform better in elevated CO2 condition which is anticipated in upcoming days.

Keywords: FACE, elevated, CO2, durum


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