Increasing Productivity of Paddy (Oryza sativa L.) Through Use of Seaweed Sap. Patel Vipul P.1, Deshmukh Swapnil1,*, Patel Amrutbhai1, Ghosh Arup2 1Regional Rice Research Station, Navsari Agricultural University, Vyara, Gujarat, India 2CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat, India *email: swapnil.deshmukh056@yahoo.in
Online published on 13 January, 2016. Abstract An attempt was made to study Kappaphycus alvarezii and Gracilaria edulis sap on paddy undertaken at Regional Rice Research Station, Vyara, Gujarat (India) during summer season of 2012. The different levels (2.5, 5, 7.5, 10 and 15%) of K-Sap and G-Sap extracted from Kappaphycus alvarezii and Gracilaria edulis, respectively combined with recommended dose of fertilizer (120: 30: 00 kg N, P2O5, K2O/ha) along with control (water spray+RDF) and 7.5% K-sap+ 50% RDF were tested in randomized block design with three replications. Significantly higher plant height, number of tillers per hill and grain yield (kg ha−1) of paddy were obtained with application of seaweed sap neither considering types nor levels coupled with RDF as compared to control (water spray+RDF) and treatment TM (7.5% K-sap + 50% RDF). Among the different levels of K and G types of sap, 10% K-sap + RDF recorded maximum value for plant height, number of tillers per hill, grain yield and straw yield. This might be due to the effect of plant growth regulators viz., indole 3-acetic acid, gibberellin GA3, kinetin and zeatin that coupled with RDF increased growth and yield of paddy crop. Top Keywords Seaweed sap, Kappaphycus alvarezii, Gracilaria edulis, Paddy, Biostimulant. Top |