INFLUENCE OF DIFFERENT CO2 LEVELS ON THE GROWTH AND COMPETITION OF SOME IMPORTANT WEEDS IN WHEAT (Triticum aestivum L.)

Pot experiments were conducted to investigate the effects of different CO2 levels on the growth and competition of Avena sterilis, Phalaris minor, Galium tricornatum and Sinapis arvensis which are important weed species in wheat (Triticum aestivum) growing areas. Two CO2 levels (500 ppm as ambient,...

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Bibliographic Details
Published in:Poljoprivreda i šumarstvo 2015-03, Vol.61 (1), p.35
Main Authors: Mese, Gözde, Dogan, M Nedim
Format: Article
Language:English
Subjects:
Carbon dioxide
Competition
Monoculture
Weeds
Wheat
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Summary:Pot experiments were conducted to investigate the effects of different CO2 levels on the growth and competition of Avena sterilis, Phalaris minor, Galium tricornatum and Sinapis arvensis which are important weed species in wheat (Triticum aestivum) growing areas. Two CO2 levels (500 ppm as ambient, 750-800 ppm as elevated) were used in the study. Weeds or wheat plants were sown to pots alone or in competition with each other. Six weeks after emergence above ground fresh and dry biomasses of all plants were determined and compared. Results showed that, biomasses of all plants were significantly increased by elevated CO2 when grown in monoculture. Under competition CO2 showed no significant effect on weed biomasses. Weeds reduced wheat biomass at both CO2 level but only significantly under elevated CO2. Wheat suppressed weeds also to higher degrees under elevated CO2 levels. S. arvensis suppression by wheat was 50% at ambient but about 95% at elevated CO2 conditions. These results show that elevated CO2 improve the growth of weeds under non-competitive conditions significantly.
ISSN:0554-5579
1800-9492
DOI:10.17707/AgricultForest.61.1.04