Conference Paper


Conference: National Seminar on Ecology and Enviroment, Volume: Special Issue


Seaweeds or marine macro-algae are important renewable plant resources occurring in the seas, brackish waters and lagoons across the globe. Application of liquid extract from these organisms as foliar spray and/or seed treatment showed positive result on enhancement of vegetative growth and yield of several crops. In addition they increase the biochemical constituents of plants and possess environmental stress mitigating potential. Amendment of seaweed liquid fertilizer (SLF) to soils improves the soil health by enhancing the micronutrient quantity and quality, and microbial activity. The research work carried out so far on the beneficial role of SLF in agriculture has been reviewed. The seaweed resources of the Indian coast and the methods so far followed for preparation of SLF and their mode of application to crops is presented.

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    ABSTRACT: A field experiment conducted in the research farm of Birsa Agricultural University, Ranchi (JH) during kharif 2012-13 and 2013-14 with maize variety HQPM-1 in a randomized block design and replicated thrice, with two sources of seaweed sap namely Kappaphycus alvarezii and Gracilaria edulis at 6 concentrations (0.0, 2.5,5.0, 7.5,10.0 and 15.0% )with 100%RDF (150:60:40 kg N,P2O5 andK2O ha-1) and 4 concentrations (0.0, 7.5, 10.0 and 15%) with 50 % RDF,revealed that application of either 7.5% K sap or 5% G sap along with 100% RDF enhanced the grain yield by 34 and 30% respectively than application of 100% RDF alone (41.92 q ha-1). Application of 7.5% either of K sap or G sap along with 50% RDF produce similar grain yield (38.42 and 38.83 q ha-1 respectively) as that with 100% RDF alone and thereby saving 50% fertilizer need of the crop as well as maintained grain quality. Productivity of maize variety “HQPM-1” can be enhanced by more than 30% by the application of either 7.5%K sap or 5% G sap along with 100%RDF and can also save 50% fertilizer need of maize production with 50%RDF.