International Journal of Plant & Soil Science

A field experiment was conducted during spring 2020-21 at Wetland farms of Tamil Nadu Agricultural University, Coimbatore to study the effect of foliar Nanonutrients (N, Zn and Cu) application on the yield and nutrient uptake by rice at harvest. Twelve treatments with three replications were laid out in randomized complete block design. The results revealed that application of 100% NPK + Nano N at active tillering (T₃) and 75% N + 100% PK + Nano N at active tillering (T₄) increased the grain yield (5112 and 5063 kg ha^-1) and N uptake (106.48 and 89.51 kg ha^-1) of rice, respectively and was on par with 100% NPK + Nano Zn at active tillering and panicle emergence (T₁₀). However, significantly higher Zn and Cu uptake were recorded in 100% NPK + Nano Zn at active tillering and panicle emergence (T₁₀, 457.61 g ha^-1) and 100% NPK + Nano Cu at active tillering and panicle emergence (T₁₂, 92.36 g ha^-1), respectively which was followed by 100% NPK + Nano N at active tillering (T₃, 372.45 and 81.51 g ha^-1) and 75% N + 100% PK + Nano N at active tillering (T₄, 355.41 and 84.13 g ha^-1). Thus, it can be concluded that application of foliar Nano N at active tillering along with soil application of either 100% NPK or 75% N + 100% PK can provide better results in terms of grain yield and nutrient uptake.