فیزیولوژی محیطی گیاهی (Sep 2020)
The effect of different levels of humic acid on some morpho-physiological traits and essential oils of garden savory (Satureja hortensis L.) under vermicompost application
Abstract
Soil fertility is an effective factor on quantity and quality of crops and medicinal plants. In order to investigate the effect of vermicompost and humic acid on quantitative and qualitative traits of savory(satureia hortensis L.), an experiment was conducted as factorial based on completely randomized design in Payame Noor University of Sabzevar under natural condition. Treatments were vermicompost in three levels (0, 25, and 50 percent in volume) and humic acid in four levels (0, 250, 500, and 750 mg.l-1). In this study, plant height, root length, branch number as well as leaf, root, and shoot dry weights and essential oil percentage and yield were measured. Results indicated that vermicompost affected stem height, branch number per m2, dry weight of leaf, stem, and root, and leaf to stem ratio significantly while this treatment did not have a significant effect on essential oil percentage and yield of savory. The highest stem height and dry weight of leaf, stem, and root were observed in 50% vermicompost. The effect of humic acid was also significant on stem and leaf dry weight and leaf to stem ratio, statistically. In general, results showed that both organic fertilizers had synergistic effect as the highest dry weight of leaf, stem, and root and also essential oil yield were obtained under vermicompost 50% and humic acid 750 mg.l-1 treatment.
