Document Type : Research Paper
Authors
1 PHD Student Department of Agriculture and Plant Breeding. Faculty of Agricultural Technology (Abouryhan),University of Tehran. Pakdasht.Iran
2 Associate Professor, Department of Agronomy and Plant Breeding Sciences, Faculty of Agricultural Technology (Aborihan) University of Tehran, Pakdasht, Iran.
3 Assistant Professor, Department of Agronomy and Plant Breeding Sciences, Faculty of Agricultural Technology (Aborihan) University of Tehran, Pakdasht, Iran.
Abstract
The present study was conducted during the agricultural year 2021-2022 in plots with three repetitions at the research farm of Aboureihan Campus, located in the Pakdasht region of Tehran province. In this study, the light level was controlled at four levels (no shading, light-shade, shade-light and complete shading). The main factor was the light control at these four levels, and the secondary factor was the planting date at three levels (20th of April, 10th of May, and 31th of May). Applying complete shading initially, and then transitioning to shade-light treatment along with planting ginger on the 20th of April, had the most significant impact on increasing all the examined traits, including yield components, yield, and the percentage of essential oil in ginger rhizomes. The two mentioned treatments (complete shading and shade-light) led to an approximately 29% increase in the number of rhizomes in ginger plants compared to both the full light treatment and the light-shading treatment. On the other hand, the highest ginger essential oil percentage (1.76%) was obtained in plants planted on the 20th of April, which did not show a significant difference compared to plants planted on the 10th of May (1.66%) but was approximately 25% higher when compared to the essential oil percentage of plants planted on the 31th of May.Therefore, the overall results demonstrated that implementing shading treatment on the planting date of 20st of April could be a promising method for significantly increasing both the quantitative and qualitative yield of ginger under similar climatic conditions.
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