COMBATING FERTILIZER CRISIS IN SUGARCANE BY USE OF GLUCONACETOBACTER DIAZOTROPHICUSS. V. Nalawade, R.A., Pandhare, D.V. Indi, J.B. Mali and S.M. Pawar
A field experiment was conducted in a randomized block design with three replications on sugarcane variety Co 86032 for 3 years in preseason during 2004-05 to 2006-07. The effect of pre-planting sett treatment and/or soil application with Gluconacetobacter diazotrophicus or composite culture consisting of Azotobacter, Azospirillum, G. diazotrophicus and PSB with varying levels of fertilizer nitrogen was studied. The treatment T5 i.e. application of 50 per cent recommended dose of N and 100 % recommended P2O5 and K2O coupled with pre-planting sett treatment with G. diazotrophicus for 30 minutes @ 10 kg in 100 lit water ha-1 recorded the highest cane yield (119.49 t ha-1) and was also the most beneficial treatment as revealed through the highest gross monetary returns (Rs. 1,60,871/- ha-1), net monetary returns (Rs. 92,413/- ha-1) and benefit : cost ratio (2.36). Thus, sett treatment with G. diazotrophicus at the time of planting could save 50% of chemical fertilizer nitrogen with equivalent cane yield and higher monetary returns of Rs. 5,682/- ha-1 as compared to only recommended dose of fertilizers (100 % NPK).
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