IMPACT OF PHOSPHATE SOLUBILIZING MICROORGANISM AND RHIZOBIUM ON GROWTH, NUTRITION AND MICROBIAL LOAD OF COWPEA (VI GNA LINGUICULATA (L.) WALP) FERTILIZED WITH ROCK PHOSPHATEB. KARLINAI SELVI AND A. DAVID RAVINDRAN
Cowpea-was inoculated with phosphate solubilizing microorganism and Rhizobiurn sp. along with rock phosphate in sterilized vermiculite using plastic pots. Plants inoculated with phosphate solubilizing microorganism, Rhizobium sp. with rock phosphate recorded highest seed germination, shoot and root length, Flesh and dry weight of shoot and root, number of nodules and nutrient content as compared to inoculation with either one organism or two organisms. Interaction between host and symbionts also varied with cultivars. From the present study it can be concluded that phosphate solubilizing microorganism and Rhizobium sp. along with rock phosphate combination can have important impact on nodulation, nitrogen fixation and nutrient uptake in cowpea.
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