بررسی اثر عمق‌های مختلف دفن بر خصوصیات رشدی ریزوم حلفه (Imperata cylindrica L. Beauv)

Cogongrass is the most problematic weed species in the world and rhizome is the most important factor in its establishment and spreading. Although farmers believe that deep plowing is a good control measure for this weed species, scientific research has not yet been done in this case .This experiment was done to determine the effect of burial depth on the rhizome characteristics at the experimental greenhouse of the Research and Training Institute for the Development of Sugar Industry in Khuzestan. The experiment was based on randomized complete block design with 6 treatments of burial depth (2.5, 5, 10, 20, 30 and 40 cm) and 3 replications. Results showed that rhizomes buried at soil depths greater than 30 cm did not have the ability to emerge. Moreover, results showed that rhizomes had the greatest potential of emergence and growth at burial depths range of 2.5 to 10 cm. Based on these results, plowing with depths greater than 30 cm can be an effective control measure for cogongrass, provided that the following cultivations are accomplished at lower depths to prevent bringing the buried rhizomes to the lower soil depths again.