Role of seaweed extract application on physiological planting value of rice (Oryza sativa L.)
Elavarasan E, S Padmavathi, P Satheeshkumar, S Suganthi, A Kamaraj
Seaweed extract have been used for several decades to enhance plant growth and productivity and the use of seaweed formulations as a bio stimulants in crop is well established. Seaweed extracts was applied as a seed treatment to enhance the seed quality. Knowing the quality of rice seed will enable one to decide the appropriate practices that could help to maintain or improve the performance of seed lots. The seeds of rice cv. ADT 36 were imposed with priming treatment with seaweed extract of two species viz., Gracilaria carticata and Sargassum wightii at different concentration for 20 hoursalong with control and the seeds were evaluated for the seed quality under laboratory condition. From the results, it was concluded that seeds treated with 1% of Sargassam wightii seaweed extract recorded higher values for the initial seed qualities viz., germination percentage (91%), speed of germination (34.69), root length (28.78 cm), shoot length (13.52 cm), seedling fresh weight (2.57 g), seedling dry weight (0.28 g), vigour index I (3849.30) and vigour index II (25.48) and the lower values were recorded by the untreated seeds. Hence, rice seeds primed with 1% Sargassam wightii seaweed extract could be recommended for priming seed treatment for improving the planting value of seed.