The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Year 2015, Volume 61 Issue 1
| Year : | 2015 |
| Volume : | 61 |
| Issue : | 1 |
| Authors : | Gözde MEªE, M.Nedim DOĞAN |
| Title : | INFLUENCE OF DIFFERENT CO2 LEVELS ON THE GROWTH AND COMPETITION OF SOME IMPORTANT WEEDS IN WHEAT (Triticum aestivum L.) |
| Abstract : | 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 CO2when 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. Although weed growth was not directly affected by elevated CO2 under competitive conditions, they caused higher biomass reduction of wheat. However, the growth of wheat plants was so improved by elevated CO2, that they still produced as much biomass as of those grown without competition at ambient CO2. These results suggest that global CO2 increase might cause increase in wheat growth, but weed control will still be important issue to maintain maximum yield. |
| For citation : | Gözde MEªE, M.Nedim DOĞAN: INFLUENCE OF DIFFERENT CO2 LEVELS ON THE GROWTH AND COMPETITION OF SOME IMPORTANT WEEDS IN WHEAT (Triticum aestivum L.). Agriculture & Forestry, Vol. 61 Issue 1: 35-39, 2015, Podgorica |
| Keywords : | Wheat, weed, CO2, competition, herbicide |
| download paper | |