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Field experiments were conducted during 2012 at Research farm, Department of Agronomy Dr. PDKV, Akola (Maharashtra) to study the “Significance of marine algal sap as foliar nutrition on quality and nutrient uptake of blackgram”. The foliar spray marine algal saps were applied twice at different concentrations (0, 5, 10 and 15% v/v) of (Kappaphycus and Gracilaria sap). Foliar applications of marine algal sap significantly enhanced the highest protein yield, vigour index macro and micro nutrients. Highest protein yield (340.43 kg ha-1) and vigour index (3529.03%) were recorded with foliar application of Gracilaria sap + recommended dose of fertilizer (RDF). The protein yield increment was computed 31.67% and 25.75% respectively compare to the control. The highest macro nutrients uptake i.e. nitrogen, 54.47 and 27.59, 7.46 and 4.49 kg ha-1 phosphorus and 14.34 and 17.56 kg ha-1 potassium in grain and straw were observed by foliar application of 15% G-sap + RDF. Similarly, highest uptake of micronutrients (Cu, Fe, Mn and Zn) was registered with 15% G-sap + RDF. Presence of some macro and microelements and growth promoter, especially cytokinins, IAA, GA in Kappaphycus and Gracilaria extracts responsible for enhancing protein yield and improving nutrients uptake of blackgram.
Key words: Blackgram, Kappaphycus sap, Gracilaria sap, macronutrients and micronutrients.