Response of Bt. Cotton {Gossypium hirsutum L.) to Plant Densities and Fertilizer Levels Under Different Irrigation Methods

摘要

Drip irrigation along with 125 per cent general recommended dose of fertilizer (125:62.5:62.5 kg N, P_2O_5 and K2O ha~(-1) + 10 t FYM ha~(-1)), coupled with nitrogen fertigation upto 60 days recorded significantly maximum growth and yield attributes and seed cotton yield (43.22 q ha~(-1)) as compared to lower level of fertilizer dose and surface irrigation. The high plant density of 18,518 plants ha~(-1) (180 x 30 cm) recorded significantly higher seed cotton yield than low plant densities (11, 111 and 12, 345 plants ha~(-1)). Significantly higher uptake of nitrogen, phosphorus and potassium by Bt. cotton was registered with application of 125 per cent general recommended dose of fertilizer. The maximum water use efficiency was observed in drip irrigation method than surface irrigation method.