Economization of Nitrogen Requirement of Summer Irrigated Cotton through Use of Biofertilizers
Sep 12, 2018


An experiment was conducted on G. hirsutum variety LRA 5166 under summer irrigated conditions in Western Maharashtra to assess the possibility of reducing rates of N fertilizer through the use of bio-fertilizers. The experiment was on a medium deep, black soil, low in N, medium in P2O5 and high in K2O. Experiments were repeated over three years from 1995 to 1887 in split plots with three replications Sixteen treatment combinations consisted of the use of bio-fertilizers Azotobacter and Azospirillium through seed treatment and soil application with four levels of N, 0kg, 40kg, 60kg and 80kg per hectare. P2O5 and K2O were applied as basal dressings of 40 kg/ha. Pooled data indicated no significant differences between Azotobacter and Azospitillium or the method of application. However, bio-fertilizer seed treatment reduced inorganic N requirements by about 25%.

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