Impact of Integrated Application of Potassium Fertilization and Several Biostimulants on Morphological Traits, Yield and Essential Oil Content of Caraway | ||
| Journal of Sustainable Agricultural and Environmental Sciences | ||
| Volume 4, Issue 4, December 2025, Pages 145-155 PDF (476.46 K) | ||
| Document Type: Original research paper | ||
| DOI: 10.21608/jsaes.2025.437817.1188 | ||
| Authors | ||
| Ragia M Mazrou* ; Mohamed M Afify; Nourhan Hassan | ||
| Abstract | ||
| The aim of this study therefore was to evaluate the impact of potassium (K) fertilization and/or moringa leaf extract (MLE), seaweed extract (SWE) and yeast extract (YE) on the growth, fruit yield, volatile oil content, oil components and chemical composition of Carum carvi L. plant. K fertilizer was applied at rates of 0 (K0), 50 (K1), and 100 kg/fed (K2) as potassium sulfate. Biostimulants were applied at 1:30 v:v, 5 g/L and 10 mL/L for MLE, YE and SWE, respectively. The results revealed that the growth traits and fruit yield components were significantly enhanced due to K fertilization or biostimulants, more so with the interaction between K2 and SWE in both seasons. Moreover, K fertilization and/or biostim-ulants markedly improved the essential oil content since considerable increases in essential oil per-centage and yield were observed in treated plants compared to the control. Specifically, SWE treatment increased essential oil yield/feddan by 80.76 and 80.58% compared to the control in both seasons, respectively. Interestingly, essential oil composition was also affected by these treatments and GC-MS analysis showed that the main components of caraway essential oil are β-Myrcene, D-Limonene, trans-Dihydrocarvone and Carvone. Furthermore, K fertilization and/or biostimulants (MLE, YE or SWE) considerably enhanced total chlorophyll, carotenoids, and N, P and K elements in caraway compared to the control. Collectively, K fertilizer combined with biostimulants, particularly SWE as promise and ecofriendly bio-stimulant may be used to improve the growth, productivity and essential oil content in caraway. | ||
| Keywords | ||
| Medicinal plants; biostimu-lants; oil yield; chlorophyll | ||
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