Competition of Different Densities of Wild Mustard (Brassica kaber) and Rapeseed (Brassica napus) in Greenhouse

A greenhouse experiment was conducted to evaluate the competitive effects of different densities of wild mustard as against rapeseed. The experiment was performed in a randomized complete block design with four replications using replacement series in which wild mustard and rapeseed were respectively planted in different ratios of 4:0, 3:1, 2:2, 1:3 and 0:4 plants per pot. Results indicated that the maximum height, number of siliques per plant, silique length and number of seeds per silique in rapeseed vs. the maximum height, silique length and number of seeds per silique in wild mustard were obtained in their monoculture states. Overall evaluation of relative yield showed that both species were exploiting the resources in different ways or even somehow benefiting each other. Relative crowding coefficient of rapeseed as against wild mustard in the 3:1 treatment was greater than that in the other plant ratio treatments. Competition indices revealed that rapeseed benefited from a more competitive ability than wild mustard.