Influence of Different Doses and Methods of Phosphorous Solubilizing Bacteria and Phosphorus Levels on the Phosphorus Solubilizing Bacteria Population and Phosphorous Use Efficiency in Sunflower and Chickpea

Abstract

A field experiment was conducted to study The effect of the application method and different doses of phosphate solubilizing bacteria (PSB) application and the phosphorus levels on sunflower during Rabi, 2020 at College of Agriculture, PJTSAU, Rajendranagar, Hyderabad. The experiment was laid out in Randomized Block Design, comprising eleven treatments with three replications. Initial soil parameters of experimental site indicated that the soil belongs to sandy loam texture, with alkaline in soil reaction, non-saline, low in O.C, low in available nitrogen, medium in available phosphorus, available potassium and available sulphur. The results showed that due to addition of PSB in powdered and liquid form there was an increase in PSB population in the soil, the increase in population is with the application of 75% phosphorus + PSB at 6 kg/ha in both crops. The increase in population is more with the soil application than the Drenching. Due to this there is also an increase in the phosphorous use efficiency. The above study indicated that combined application of PSB with reduced P levels could help in saving fertilizer dose to the extent of 25% in sunflower and 50% in chickpea.