Phosphate solubilizing rhizospheric bacterial communities of different crops of Korea District of Chhattisgarh, India

Abstract

Occurrence of Phosphate Solubilizing Bacteria (PSB) in the rhizospheric soil of different crops of Korea District of Chhattisgarh, India was studied. Phosphate solubilizing bacteria colonize the plant roots, affect plant growth positively and add nutrients to the soil. A good number of PSB were isolated, purified and identified from twenty-five different representative soil samples collected from five blocks of Korea District of Chhattisgarh, India. The bacterial species were Pseudomonas alcaligenes, Pseudomonas syringae and Bacillus subtilis. The total rhizospheric bacterial (TRBP) population indicated that bacterial population in the rhizospheric soil of Korea District of Chhattisgarh ranged from 3.03 × 10 6 to 4.92 × 10 6 cfu. TRBP was affected greatly by different physico-chemical properties of soil (nitrogen, phosphorus, potassium, organic carbon %, pH and electrical conductivity = EC). All the parameters studied showed positive correlation with TRBP except EC that showed negative correlation. On the basis of correlation co-efficient values, positive significant values are grouped in three. Example – strong (r = >0.5), medium (r = < 0.4 but greater than 0.1) and weak (r < 0.1). The present study indicates 100% distribution of phosphate solubilizing bacteria in soil of Korea district of Chhattisgarh, India, indicating only 14% occurrence of Pseudomonas spp. while 86% bacterial inhabitants belong to genus Bacillus. P (Phosphorus) had strong positive significant correlation with TRBP. N, K & OC% had medium correlation and pH had weak positive significant correlation with TRBP.