Response of Bt cotton hybrids to plant densities and fertilizer levels.

摘要

A field experiment was conducted to determine the suitable plant density and NPK fertilizer level for Bacillus thuringiensis (Bt) cotton hybrids under rainfed conditions of Marathwada (Maharashtra, India) during 2005/06 and 2006/07. The highest plant density, i.e. 27 777 plants/ha (60x60 cm plant spacing) performed better than lower plant densities, i.e. 18 518 (90x60 cm) and 12 345 plants/ha (90x90 cm) for Bt cotton hybrids. Application of the highest level of NPK, i.e. 100:50:50 kg/ha, proved beneficial than the lower levels (80:40:40 and 60:30:30 kg/ha). Bt hybrid NCS-145 performed better than RCH-2, with 42.45% higher seed cotton yield.