Screening of advanced lines of slender rice against major diseases of rice under natural conditions and their yield performance

Abstract

Field experiment was conducted during kharif season of 2012 and 2013 in maize crop (Var. HQPM-1) at research farm of Birsa Agricultural University, Kanke Ranchi Jharkhand, India. The experiment was laid out in randomized block design with Eighteen treatment combinations, consisting of two seaweed saps (Kappaphycus alvarezii and Gracilaria edulis), and each of which applied in 5 concentrations (2.5; 5.0; 7.5; 10 and 15%) at 100% RDF and 3 concentrations (7.5;10 and 15%) at 50% RDF and control (two) at each fertilizer level. Seaweed saps were sprayed as per treatments on the foliage of maize thrice at 20 days interval starting from 30 days after sowing (DAS) till 70 DAS. The experimental results revealed that application of 7.5% K sap and 5% G Sap produced 34 and 30% higher grain yield over 100% RDF respectively, as well as 7.5% K sap and 5% G sap at 50% RDF produced as high yield as 100% RDF alone without significant change in available nitrogen in soil with similar net return.