摘要 : A field experiment was conducted on clayey soils during kharif season of 2005-06 at the Farm of Agronomy, Dr. PDKV, Akola, India to evaluate the effect of sources (single superphosphate (SSP), diammonium phosphate (DAP) and rock p... 展开 A field experiment was conducted on clayey soils during kharif season of 2005-06 at the Farm of Agronomy, Dr. PDKV, Akola, India to evaluate the effect of sources (single superphosphate (SSP), diammonium phosphate (DAP) and rock phosphate) and levels of phosphorus (25, 50 and 75 kg P/ha) with and without phosphate solubilizing bacteria (PSB) inoculation on yield, uptake and economics of soyabean. The results indicated that the application of phosphorus through SSP recorded significantly more number of pods, yield per plant, seed and straw yield, phosphorus uptake, gross and net monetary returns than DAP and rock phosphate. Seed-inoculated PSB culture recorded significantly higher yield attributes, yield, nitrogen and phosphorus uptake, gross and net monetary returns over non-inoculation. Increase in phosphorus level from 25 to 50 and 50 to 75 kg/ha resulted in significant increase in yield attributes, yield, nitrogen and phosphorus uptake, gross and net monetary returns. 收起