Effect of Micronutrients Application Over Different Levels of Rdf on Performance of Mung Bean (Vigna Radiata L.wilczek)

Abstract

The field experiment entitled “Effect of micronutrients application over different levels of RDF on performance of mung bean (Vigna radiata L.Wilczek)” was carried out at CRC main Campus, Sardar Vallabhbhai Patel University of Agriculture and Technology, Modipuram, Meerut (UP), India, during Zaid 2019. The soil of the experimental field was well drained, sandy loam in texture and slightly alkaline in reaction. It was low in organic carbon and available nitrogen, medium in available phosphorus and potassium. Total twenty treatment combinations comprised of five levels of RDF (N1: Control, N2: only Rhizobium N3: 75% RDF + Rhizobium, N4: 100% RDF, N5: 100% RDF + Rhizobium) in main plot and four levels of micronutrient spray (M1: Only water spray, M2: Fe (0.5% solution), M3: Mo (0.05% solution), M4: Fe + Mo (0.5% solution & 0.05% solution), in sub plot were tested in split plot design with three replications. The variety IPM-0203 was sown and harvested on March 29 and June 10, 2019, respectively. The finding revealed that plant growth, yield attributes and yields of mung bean was influenced significantly by the different levels of RDF as well as foliar spray of Iron and Molybdenum. Application of 100% RDF + Rhizobium recorded significantly higher growth parameters, yield attributes and yield of the mung bean, which resulted in higher net return and B:C ratio over 75% RDF + Rhizobium and control. Whereas, foliar spray of Iron @ 0.5% and Molybdenum @ 0.05% at 25 and 40 DAS also recorded the highest value of growth parameters, yield attributes and yield of mung bean, which was significantly higher than control. On an averages 115% increase in grain yield was recorded with 100% RDF + Rhizobium followed by two spray of micronutrients (Fe + Mo @ 0.5 % + 0.05%) at 25 and 40 DAS. The highest B:C ratio 3.14 and 3.72 , net return Rs 47,077 and Rs 51,775 ha-1 was recorded with 100% RDF + Rhizobium followed by two spray of micronutrients ( Fe + @ 0.5% + Mo @ 0.05% solution), respectively. The highest nutrient uptake (N, P2O5, K2O, Fe and Mo) by grains, straw as well as total uptake was recorded with application of 100% RDF + Rhizobium followed by foliar spray of Fe @ 0.5% + Mo @ 0.05% alone or in combination, which was significantly higher than control. However application of 100% RDF + Rhizobium fallowed by two spray of micronutrients (Fe + Mo) recorded marginally higher value of available N, P2O5, K2O in soil after harvest of the crop. Thus it can be concluded from the results of the investigation the application of 100% RDF + Rhizobium supplemented with two foliar spray of Iron @ 0.5% + Molybdenum @ 0.05% at 25 and 40 DAS will be beneficial to get the higher grain yield of mung bean (cv IPM-0203) under well drained, sandy loam soil of western UP.