Effect of Seaweed Extracts on Growth and Yield of China Aster cv. Arka Archana under Prayagraj Agro Climatic Conditions

The objective of this study was to assess the effect of seaweed extracts on the growth and yield of China aster (cv. Arka Archana). Thirteen different treatments,along with control were employed in order to investigate their effects. The treatments consisted of two concentrations (2ML/L and 4ML/L) of Ascophyllum nodosum seaweed extract, two concentrations (2ML/L and 4ML/L) of Durvillaea potatorum seaweed extract, and application intervals of 5, 10, and 15 days.To ensure accuracy and reliability, each treatment in the study was replicated three times using a randomized block design (RBD).Various growth parameters, including plant height (cm), number of leaves, number of branches, plant spread (cm), were examined to assess the plant's growth progress. The yield parameter was assessed by examining flower yield per plant, flower yield per plot, and flower yield per hectare.Among the different treatments, treatment T9 (2ML/L Ascophyllum nodosum applied at 15 days interval) demonstrated the highest values for various parameters, including plant height (53.41 cm), number of leaves (172.78), number of branches (25.40), plant spread (53.33 cm), flower yield per plant (367.15 g), flower yield per plot (2202.92 g), and flower yield per hectare (23.13 t). Conversely, the control group (water spray) exhibited the lowest values across all parameters. These findings led to the conclusion that foliar applications of 2ML/L Ascophyllum nodosum at 15 days interval have the potential to significantly enhance flower yield, making it a promising option for improving overall productivity.