- - نويسنده Assistant Professor, Department of Range and Watershed Management, Faculty of Water and Soil, University of Zabol, Zabol, Iran Ebrahimi Mahdieh , - - نويسنده Former M.Sc. Student of Range Management, Department of Range and Watershed Management, Faculty of Water and Soil, University of Zabol, Zabol, Iran Miri Elham
The study was conducted to investigate the effect of humic acid on the germination properties of medicinal plants Borago officinalis and Cichorium intybus in a completely randomized design with five replications. Experimental treatment comprised the following dosages 0, 15, and 30 g l-1. The results revealed that effect of humic acid on the germination properties of C. intybus was significant (p<0.01) except for the germination percentage and mean germination time (p< 0.01). In addition, humic acid was effective on the morphological properties of C. intybus except for radical and pedicel dry weight. Humic acid was also effective on the germination properties of B. officinalis except for the germination percentage (p<1%); it was only effective on morphological properties viz. radical fresh weight, seedlings’ pedical length and allometric coefficient. The most effect was obtained in the 30 g l-1 humic acid.The control treatment had the least effect on the plantʹs properties. In conclusion, the results showed that application of 30 g l-1 humic acid was effective in germination of the plant species and stimulated the plants germination.