Dr. Kavita AravindakshanCHANDRA SHEKHAR PATIDAR2024-06-182024-06-182023https://krishikosh.egranth.ac.in/handle/1/5810210529A field experiment was conducted to study the “Effect of Seaweed Extract on growth, yield and quality of onion (Allium cepa L.)” during the rabi season, 2021-22 at the Department of Vegetable Science, College of Horticulture and Forestry, Jhalrapatan city, Jhalawar (Rajasthan). The experiment consisted of nineteen treatment combinations including seaweed granules as soil application, seaweed extract as foliar application (single and double foliar spray) and combine application of seaweed granules and extract in various doses including control. The experiment was laid out in a randomized block design (RBD) with three replications. Data were collected on different growth, yield and quality contributing characters of onion. Among different treatments of seaweed extract (soil and foliar), T19 (Seaweed extract granules @ 20 kg ha-1 + Seaweed extract 0.6 %) was found significantly superior as it exhibited maximum number of leaves per plant at 60 and 90 DAT (5.8 and 11.5), length of leaves at 60 and 90 DAS (43.87 and 56.13cm) , plant height at 60 and 90 DAT (47.72 and 59.21 cm), total chlorophyll content of leaves (0.52 mg/g), pseudostem diameter at 90 DAT (21.68 mm) average weight of bulb (59.55g), diameter of bulb (6.05 cm), bulb length (5.84 cm) yield of bulb per plot (5.95 kg), estimated yield of bulb per hectare (365q./ha), TSS (13.57 %), dry matter content (14.63%), net returns (223009 /ha), B:C ratio (3.23), organic carbon (0.60%), N (328.93 kg ha-1), P (28.95 kg ha-1), and K(230.95kg ha-1) were recorded as compared to control, respectively. Further, treatment T10 (Seaweed extract 0.6 % double foliar spray at 30 and 60 DAT) exhibited maximum value for nitrogen content in bulb (0.45 %), crude protein (2.83%) and pungency in bulb (9.05 μ mol./g) were recorded as compared to control, respectively. From the present investigation it may concluded that seaweed higher growth, yield and quality of onion can be obtained by soil application of Seaweed extract granules @ 20 kg ha-1 and foliar spray of seaweed extract @ 0.6%.EnglishThesis