Nitrogen leaching from paddy field with different nitrogen and water management practices

An experiment was conducted growing rice (cultivar Pusa-44) for assessing leaching losses of inorganic nitrogen as affected by water management practices and nitrogen treatments.

The treatments were unfertilized control, Prilled urea, Neem coated urea (NCU), Leaf colour chart based Neem coated urea (NCU-LCC), and integrated treatment of farm yard manure, neem coated urea and bio fertilizer in continuous flooding and intermittent flooding water regimes. The leachate was collected using porous suction cups installed in different treatment plots and leachate was analysed for nitrate and ammoniacal N. Loss of applied N ranged from 9.23 to 12.53% in different treatments.