Growth, yield and water use of bt cotton under drip fertigation using different phosphorus sources

The field experiment was conducted during Kharif season of 2015–16 at the research farm of Inter Faculty Department of Irrigation Water Management, MPKV, Rahuri, Dist. Ahemdnagar(MS) to study the effect of drip fertigation through different phosphorus sources on growth, yield attributes and water use of Bt Cotton. The experiment consisted of eight treatments, each replicated thrice. Growth attributes and yield of Bt Cotton were significantly influenced by drip fertigation treatments. Application of 100% fertigation through drip was significantly superior over soil application under surface irrigation and registered maximum plant height (179.4cm), monopodial branches (4.90), sympodial branches (18.93), cotton yield(39.85q ha⁻¹) and lint yield (14.01 q ha⁻¹). It was on par with 75% fertigation. The drip resulted in lowest water use (506 mm) as compared to surface irrigation (1131.9 mm) and resulted into 55.63% water saving.