The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Year 2014, Volume 60 Issue 3
| Year : | 2014 |
| Volume : | 60 |
| Issue : | 3 |
| Authors : | Ralitsa NAKOVA, Ganka BAEVA |
| Title : | A STUDY OF SHOOT AND ROOT COMPETITION IN AMARANTHUS HIBRIDUS |
| Abstract : | The pot experiment was carried out in a greenhouse of the Plant Protection Institute, Kostinbrod, in 2011 and 2012. Treatments included five levels of Amaranthus hibridus densities (1, 2, 4, 6, 8 plants per pot). Weed plants were harvested at 90 days after emergence. Shoot height, root length, fresh and dry weight of shoots and roots were determined. It was established Competition Index (CI) and Relative Competitive Ability Index (RCAI). The results presented in this paper show that there was difference in the competitive ability of Amaranthus hibridus in intra-specific competition. The weed had a higher shoot competitive ability on 90 days after emergence. The Relative Competitive Ability Index (RCAI) of the weed in different densities was highest in the growth parameter - shoot height. It was found significant density x shoot competition interaction for shoot height and above-ground weight. There was also density x root competition interaction for root length and weight. Increasing the density from 2 to 8 plants per pot increased competition for light and nutrients and water. The radiation absorption through the weed canopy declined when density increased, which may explain the higher reduction in Amaranthus hibridus above-ground parameters 90 days after emergence. The results suggest that it may be possible to select crops for greater competitive ability against Amaranthus hibridus. |
| For citation : | Ralitsa NAKOVA, Ganka BAEVA (2014): A STUDY OF SHOOT AND ROOT COMPETITION IN AMARANTHUS HIBRIDUS.Agriculture and Forestry, Vol. 60. Issue 3: 65-72, Podgorica |
| Keywords : | Amaranthus hibridus, density, shoot competition, root competition, growth parameters |
| download paper | |