Effect of Rhizobium and molybdenum inoculant on nodulation, growth and yield of green gram (Vigna radiata L.)

Abstract

The present investigation entitled “Effect of Rhizobium and molybdenum inoculant on nodulation, growth and yield of green gram (Vigna radiata L.)” was carried out during kharif season 2024 at the Instructional Cum Research Farm, Barrister Thakur Chhedilal College of Agriculture and Research Station, Bilaspur (C.G.). The experiment was laid out in RBD with three replications. The treatments consisted of seven nutrient management practices viz., Control with 100% PK (T1), 100% RDF @ 25:50:25 kg N:P: K ha-1(T2), 100% PK+ Rhizobium @ 5g kg-1 seeds (T3), 100% RDF+ Mo seed treatment @ 5g kg-1 seeds (T4), 100% RDF+ Rhizobium @ 5g kg-1 seeds (T5), 100% PK+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seeds (T6), 100% RDF+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seeds (T7).The results showed that growth parameters, viz., plant population, plant height, number of branches, number of nodules, dry weight of nodules and yield attributes viz., pod length, number of grains, number of pods, test weightwasfoundtobehigherundertreatmentT7-100% RDF+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seedsstatisticallybeingatparwithT5-100% RDF+ Rhizobium @ 5g kg-1 seeds and being significantly superior than all the other treatments. The yield parameters like grain yield and straw yield, recorded maximum yield under T7-100% RDF+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seeds, this treatment was being statistically at par with T5-100% RDF+ Rhizobium @ 5g kg-1 seeds and significantly superior than all the other treatments. The economic parameters like gross returns, net returns and B:C ratio was significantly superior under treatment T7-100% RDF+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seeds. The highest gross return (132330.74₹ha-1) and net return (101826.35₹ha-1) were obtained under T7-100% RDF+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seeds, followed by the treatment T5 -100% RDF+ Rhizobium @ 5g kg-1 seeds and T4-100% RDF+ Mo seed treatment @ 5g kg-1 seeds. The highest benefit: cost ratio (3.33) recorded under the treatmentofT7-100% RDF+ Rhizobium @ 5g kg-1 seeds + Mo seed treatment @ 5g kg-1 seeds. However, minimum gross return, net returns and benefit: cost ratio was obtained under control plot (T1).