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The nutrient use efficiency of maize (Zea mays L.) due to NPK fertilization alone is low, while, an integrated use of nutrients enhances the uptake and efficiencies of applied nutrients. A field study was carried out to test the effect of fertilizer NPK, microbial seed treatment and panchagavya on grain yield, nutrient uptake and use efficiencies of relay cropped maize during the summer season of 2018 in Annamalai University Experimental Farm, Annamalainagar, Tamil Nadu. Thirteen treatments comprised of 100, 75 and 50% of RDF in combination with and without seed treatment of microbial consortia and 3% panchagavya foliar spray at knee high and pre-tasseling stages. The maximum grain yield, NPK uptake, physiological efficiency, internal efficiency and unit area efficiency were registered with integrated application of 100% RDF (250:75:75 kg N, P2O5 and K2O/ha) along with seed treatment with microbial consortium and foliar application of panchagavya at knee high and pre-tasseling stages. However, grain yield and NPK uptake were statistically on par with integrated application of 75% RDF (188: 56: 56 N, P2O5 and K2O kg/ha), seed treatment with microbial consortium (20 ml/kg) and 3% panchagavya foliar application at knee high and pre-tasseling stages. The agronomic efficiency, apparent nutrient recovery, value cost ratio was high in integrated application of 75% RDF, seed treatment with microbial consortium and 3% panchagavya foliar application at knee high and pre-tasseling stages and was considered as an effective agro-technology.

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NUTRIENT UPTAKE AND USE EFFICIENCY OF MAIZE (ZEA MAYS L.) AS INFLUENCED BY MICROBIAL SEED INOCULATION, NPK FERTILIZATION AND PANCHAGAVYA FOLIAR APPLICATION