Effect of liquid and cyst formulations of <i>Azospirillum</i> with inorganic nitrogen on the growth and yield of rice
2009
Thamizh Vendan, R. | Thangaraju, M.
The nitrogen-fixing rhizobacterium <i>Azospirillum</i> lives in close association with plant roots, where it exerts beneficial effects on the plant growth and yield of many crops of agronomic importance. As carrier-based inoculants have a short shelf life and poor quality, new liquid and cyst formulations of inoculants have been developed and standardized for <i>Azospirillum</i> . In the present investigation, experiments were conducted to study the effect of liquid and cyst formulations of <i>Azospirillum</i> , combined with inorganic nitrogen, on the growth and yield of rice. Inoculation with the cyst formulation of <i>Azospirillum</i> enhanced the plant height, biomass and N uptake of the plants, the available nitrogen content of the soil and the yield of rice to the greatest extent when compared to carrier-based <i>Azospirillum</i> , followed by the liquid formulation. The results of the present study clearly indicated that the cyst and liquid formulations of <i>Azospirillum</i> could be used as bioinoculants more effectively than the carrier-based one.
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