Direct and Residual Effect of Phosphorus Fertilizer with AM Fungi in Maize- green Gram Cropping Sequence on Nutrients Content and Uptake

The field experiment was conducted at the College Farm, Navsari Agricultural University, Navsari in the year 2015-16 and 2016-17 to study the direct and residual effect of phosphorus fertilizer with AM fungi in maize-green gram cropping sequence on nutrients content and uptake during 2015-16 and 2016-17. Application of phosphorus fertilizer SSP and RP (composted) alone or combined with AM fungi significantly increases the NPK content in maize grain and in straw during both years of the study and in the pooled analysis. The treatment 75% P as RP+AM (290.83, 251.36 and 266.19%) increased total nitrogen uptake and 333.11, 345.44 and 340.35% total phosphorus uptake by maize (grain + straw) over control T2 during both the years as well as in pooled analysis, respectively. The total potassium uptake by maize (grain + straw) in treatment 75% P as RP+AM increased 231.1 and 124.3% over control T2 during the first year of the study and in pooled analysis, respectively and in the treatment 75% P as SSP+AM increased (92.67%) of total potassium uptake by maize (grain + straw) over control T2 during the year 2016-17. Application of treatment 75% P as RP+AM applied to preceding rabi maize increased 425.14%, 320.03 and 358.20% of total nitrogen uptake 561.54, 377.78 and 450.24% of total phosphorus uptake and 290.21, 147.00 and 191.62% total potassium uptake by green gram (grain + stover) during 2015-16, 2016-17 and in pooled analysis respectively over control T2.