Abstract
This study was conducted to assess the possible role of the integrated use of seed inoculation with plant growth promoting rhizobacteria (PGPR), compost and mineral fertilizers for improving growth and yield of wheat sown at different plant spacing. PGPR were isolated from rhizosphere soil of wheat plants. Four treatments were applied in the main plots viz., T-1 (Recommended N as Chemical Fertilizer @ 120 kg ha(-1) as Control), T-2 (Recommended N as Chemical Fertilizer @ 120 kg ha(-1) + Compost @ 250 kg ha(-1)), T-3 (Recommended N as Chemical Fertilizer @ 120 kg ha(-1) + Compost @ 250 kg ha(-1) + Inoculation with PGPR), T-4 (Recommended N as Chemical Fertilizer @ 120 kg ha(-1) + Inoculation with PGPR). Basal dose of P and K @ 100 and 60 kg ha(-1) as Diammonium phosphate and murate of potash respectively was applied to all treatments at sowing time. Maximum increase in plant height, number of tillers m(-2), and number of spikelets spike(-1), grain and straw yield were recorded with the use of PGPR inoculated seeds in combination with compost and chemical fertilizers. Maximum grain yield and 1000 grain weight were observed where PGPR inoculated seeds were used in combination with recommended chemical fertilizers. Higher N content in grain and straw were recorded with the application of seed inoculation with PGPR along with compost and recommended chemical fertilizers. Planting space had a significant effect and maximum growth and yield was recorded at 25cm plant to plant spacing.