Abstract
The effect of commercial inoculant of cyanobacteria on wheat cv. Sakha 69 grown in pot experiments using sterilized or non-sterilized clay and/or sand soils was examined. Treatments were control (water), live cyanobacteria, killed cyanobacteria, live cyanobacteria plus K, P and S, killed cyanobacteria plus K, P and S and K, P and S only. Live inoculant and live inoculant plus K, P and S significantly increased dry weight, total nitrogen, and pigment contents of wheat plants over control and other treatments. The increase in growth parameters could be attributed to the substantial increases of N-2-fixation due to nitrogenase activity of the cyanobacteria. The promotive effect of cyanobacterial inoculant, especially on growth, hold promise for use of such inoculants to enhance the nitrogen status of irrigated plantation crops.