Document Type : Research Paper
Authors
1
Department of Agronomy and Plant Breeding, Tabriz Branch, Islamic Azad University, Tabriz, Iran
2
Department of Agronomy and Agroecology, Urmia Branch, Islamic Azad University, Urmia, Iran,
3
Horticulture Crop Science Research Department, West Azarbaijan Agricultural and Natural Resources Research and Education Center, (AREEO) ,Urmia, Iran.
10.22034/saps.2025.64975.3321
Abstract
Background and Objective: This study aimed to investigate marigold plants' antioxidant and physiological properties in response to foliar application of biostimulants under various fertilizers.
Materials and methods: The study took place at the Agricultural and Natural Resources Research Center of Urmia, utilizing a factorial design based on a randomized complete block design with three replications. Modifier biostimulant treatments (i.e., CON: control, SUC: sucrose, SEW: seaweed, and HUM: humic acid) were considered as the first factor and fertilization including (i.e., CON: control, VER: vermicompost, UWC: urban waste compost, NPK: chemical fertilization, VER+NPK, UWC+NPK, and VER+UWC+NPK) were considered as the second factor.
Results: The results of this study indicated that applying a combination of VER, UWC, and NPK, along with foliar spraying of the HUM, led to the highest levels of total phenols, flavonoids, catalase, soluble sugars, and anthocyanins. Additionally, when combined with SEW, the mentioned treatment resulted in the maximum chlorophylla and b content. The results indicated that the application of SUC, SEW, and HUM increased the percentage of essential oil by 2.88%, 3.25%, and 37.50%, respectively, compared to the control group. Additionally, the extent of these increases for the treatments VER, UVC, NPK, VER + NPK, UWC + NPK, and VER + UWC + NPK, compared to the control, were 46.32%, 49.15%, 23.16%, 67.79%, 22.99%, and 60.45%, respectively.
Conclusion: The application of NPK chemical fertilizer combined with foliar spray and organic fertilizer treatments was superior to its separate application in essential oil yield and other quantitative and qualitative characteristics.
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