EFFECT OF POTASSIUM HUMATE AND BIO-INOCULANTS ON COWPEA [Vigna unguiculata L. WALP] INFLUENCE OF SOIL FERTILITY, ENZYMATIC ACTIVITY AND MICROBIAL POPULATION IN SOIL
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 53
Abstract
To study the effect of potassium humate and Bio-inoculants on soil fertility, Enzymatic activity and microbial population in soil of cowpea, a pot experiment was laid out during kharif, 2014 on loamy sand soil, at S.K.N. College of Agriculture, Jobner according to completely randomized block design with three replications. The treatments consisting of three levels of potassium humate (control, 5 and 10 mg kg-1) and five bio-inoculants (no inoculation, Rhizobium + VAM, Rhizobium + PSB, VAM+PSB and Rhizobium + VAM + PSB) were applied. The application of potassium humate @ 10 mg kg-1 and seed inoculation with Rhizobium+VAM, Rhizobium+ PSB, VAM+PSB and Rhizobium+VAM+ PSB significantly increased the organic carbon, available nitrogen, phosphorus and potassium, microbial population (bacteria, fungi, actinomycetes), enzymatic activities (alkaline phosphatase and dehydrogenase activity) in soil at harvest stage of the crop than control, while, pH and EC of soil decreased non significantly at harvest.
Authors and Affiliations
SUNIL KUMAR
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