Impact of Nano Urea on Crude Fibre, Crude Protein, and Crude Protein Yield of Single Cut Fodder Oat (Avena sativa L.)

Abstract

A field experiment was conducted at Instructional cum research (ICR) farm, Assam Agricultural University, Jorhat, during the rabi season of 2023-24 to study the impact of nano urea on crude fibre, crude protein, and crude protein yield of single cut fodder oat (Avena sativa L.). The experimental crop variety, RO-11-1, was sown during the last week of November. The soil at the experimental site was sandy loam in texture, acidic in nature (pH 5.67), medium in organic carbon content (0.64%) and available K₂O (167.65 kg ha⁻¹), but low in available nitrogen (256.6 kg ha⁻¹).and available P2O5 (21.45 kg ha-1). Ten different treatments were included to compare nano urea with conventional urea across doses and methods, identify optimal nitrogen management, capture variability, ensure statistical reliability, and assess fodder yield. Experimental findings revealed that application of 75% recommended dose of N + nano urea spray @4 ml/l (30 and 50 DAS) (T5) resulted in significantly lower crude fibre (24.17 %) and higher crude protein (12.84 %). The highest crude protein yield (10.31 t ha-1) was recorded with the application of 75% recommended dose of N + nano urea spray @4 ml/l (30 and 50 DAS) (T5).