Response of Phosphorus levels and Bioinoculants on Yield Attributes, Yield, Nutrient Content and uptake of Long duration Pigeonpea [Cajanus cajan (L.) Millsp.]

摘要

A field experiment was conducted during kharif season of 2008-09 and 2009-10 to study the response of phosphorus levels (control, 25, 50 and 75 kgP_2O_5 ha~(-1)) and bioinoculants (untreated control, PSB, PGPR and PSB + PGPR) on yield attributes viz.pod length (cm), pods plant~(-1), pod weight plant~(-1) (g), grains pod~(-1), 1000-grain weight (g), yield (q ha1), nutrient content (%) and uptake (kg ha~(-1)) of pigeonpea. The results showed that the application of 75 kg P_2O_5 ha~(-1) recorded the maximum yield attributes viz. pod length (cm), pods plant~(-1), pod weight plant~(-1) (g), grains pod~(-1),1000-grain weight (g), yield (q ha~(-1)) and it was significantly superior over 25 kg P_2O_5 ha~(-1) and control but, was at par with 50 kg P_2O_5 ha~(-1) during both the years of experimentation. Higher nutrient content and uptake were associated with 75 kg P_2O_5 ha~(-1) which was significantly superior over 25 kg P_2O_5 ha~(-1) and control but at par with 50 kg P_2O_5 ha~(-1) during both the yearsof experimentation. Amongst bioinoculants, dual inoculation of PSB + PGPR produced maximum yield attributes viz. pod length (cm), pods plant~(-1), pod weight plant~(-1) (g), grains pod~(-1), 1000-grain weight, yield, nutrient content and uptake and found significantly superior over sole application of PGPR, PSB and control. Combined application of 75 kg P_2O_5 ha~(-1) + PSB + PGPR was found significantly superior over 25 kg P_2O_5 ha~(-1) + PSB + PGPR and control which was at par with 50 kg P_2O_5 ha~(-1) + PSB + PGPR during both years in respect of grains pod~(-1) 1000-grain weight (g), grain yield (q ha~(-1)) and phosphorus uptake (kg ha~(-1)) in grain.