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RESPONSE OF BLACK GRAM [VIGNA MUNGO (L.) HEPPER] TO BRADYRHIZOBIUM JAPONICUM INOCULATION UNDER DIFFERENT SOIL AMENDMENT SYSTEMS

ARSHAD JAVAID* , RUKHSANA BAJWA AND TEHMINA ANJUM

Abstract: Growth, nodulation and yield response of Black gram [Vigna mungo (L.) Hepper] to inoculation by two strains of Bradyrhizobium japonicum viz., TAL-102 and MN-S was studied in different soil amendment systems. Soil was used either un-amended or amended with farmyard manure (FYM), Trifolium alexandrianum L., green manure (GM) or NPK fertilizers. In FYM and GM amendments, inoculation failed to induce any change in nodulation while in un-amended and NPK amended soils inoculation resulted in an increase in number and biomass of nodules. Effect of inoculation was more pronounced in NPK than in un-amended soil. In un-amended and FYM amendment, inoculation failed to induce any significant change in shoot biomass and grain yield while in GM amendment inoculation resulted in a significant reduction in the said parameters. In NPK fertilizers amendment, the enhanced nodulation in response to bradyrhizobial inoculation resulted in a subsequent increase in shoot biomass and grain yield. Grain yield was positively correlated with nodule biomass in FYM and NPK fertilizers amendments.

Department of Mycology and Plant Pathology, University of the Punjab, Quaid-e-Azam Campus Lahore, Pakistan.
Corresponding Author: arshadjpk@yahoo.com