Author(s): CH. S. KAR , D. K. BASTIA AND S. TRIPATHY

Abstract: Field experiments were conducted during 2011-2013 in Organic Block of Central Research Station, Orissa University of Agriculture and Technology, Bhubaneswar. The experiment was laid out in a randomized block design with twelve treatments and three replications in kharif season and all the corresponding treatments were the same in summer season except green manuring with Sesbania aculeata. The soil of the experimental site was sandy loam with pH 6.35, BD 1.58 t m-3, PD 2.651 m-3, high in organic carbon (9.7 g kg-1) and medium in available N-P2O5-K2O (375.0, 34.49 and 221.25 kg ha-1, respectively). Microbial population was highly influenced by organic nutrient management and Biozyme formulations during the crop growing period. Maximum microbial population (Bacteria 1.1×107 and 1.08×107, Actinomycetes 9.6×106 and 9.3×106, Fungi 9.6×104 and 9.3×104 cfu g-1 of soil) was observed at 90 DAT of crop and decreased thereafter. The bacterial, fungal and actinomycetes population during crop growing period had strong positive linear relationship with crop yield (R2=0.82 and 0.85, 0.95 and 0.95 and, 0.92 and 0.91 in kharif and summer, respectively). Organic nutrient management and Biozyme formulations, expressed conspicuous effect on microbial population which, in turn, resultedin maximumrice yield for treatment receiving Dhanicha+FYM+Vermicompost+BSP+BG+BPPL in kharif (5.09 t/ha) and corresponding treatment receiving FYM+Vermicompost+BSP+BG+BPPL in summer (4.95 t/ha). Soil status after system yield (N-P2O5-K2O 358, 36, 229 kg ha-1; OC 12.0 g kg-1; pH 6.6; EC 0.115 dSm-1; BD and PD 1.54 and 2.63 t m-1) was very close to or improved from those of initial status of soil.

Download Full Article: Click Here