Effect of Humic Acid on Seed Germination and Seedling Growth of Borago officinalis and Cichorium intybus

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 ۰, ۱۵, and ۳۰ g l-۱. The results revealed that effect of humic acid on the germination properties of C. intybus was significant (p<۰.۰۱) except for the germination percentage and mean germination time (p< ۰.۰۱). 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<۱%); it was only effective on morphological properties viz. radical fresh weight, seedlings’ pedical length and allometric coefficient. The most effect was obtained in the ۳۰ g l-۱ humic acid.The control treatment had the least effect on the plant's properties. In conclusion, the results showed that application of ۳۰ g l-۱ humic acid was effective in germination of the plant species and stimulated the plants germination.

کلیدواژه ها:

Allometric coefficient ، Medical plants ، Seed management