كليدواژه :
جوانه , ريزوم , وزن خشك , ني , گره
چكيده لاتين :
Common reed (P. australis) is a perennial and rhizomatous weed that expand mainly by rhizome. In this study, in order to investigate the effects of type and diameter of rhizome on germination and growth, two experimental designs were carried out at the Faculty of Agriculture, University of Tehran in 2006. The effect of type and diameter of rhizome on germination was studied using two factors, including rhizome diameter at three levels (1, 1.5 and 2 cm) and rhizome type at two levels (vertical and horizontal). The results revealed no significant differences among treatments, in the second experiment, the effects of type and diameter of rhizome on the growth were studied and the results showed that narrower rhizome produced shorter stems and fewer flowers. Moreover, in order to determine the effect of desiccation on common reed rhizomes, a factorial experiment was established using rhizome diameter (1, 1.5 and 2 cm) and time of desiccation (8, 15, 24, 32, 48 and 60 h). All treatments had significant effect on percentage of desiccation. Percentage of desiccation increased but percentage of germination decreased with increasing desiccation. Narrower rhizomes desiccated sooner than thicker rhizomes. So the remaing rhizomes on the ground level exposed to the sunlight for 3-4 days will damage them.
