Vol. 11, Issue 11 (2022)

Author(s):
S Kaviyazhagan, P Anandan and P Stalin

Abstract:
Field experiment was carried out at Chettikuttai Village of Harur taluk, Dharmapuri district, Tamil Nadu during July- October 2021 to study the “Nitrogen scheduling and conjoined application of nano as well as granular forms of urea in sweet corn (Zea mays var saccharata)”. The soil of the experimental field was sandy clay loam in texture with a pH of 7.7. The experiment was laid out in randomized block design with ten treatments and replicated thrice. Among the different treatments, application of 25% N as granular urea (GU) at basal + 25% N as nano urea (NU) at 4 leaf stage + 25% N as nano urea at 8 leaf stage + 25% N as nano urea at tasseling stage (T₈) proved superiority by registering better growth characters like plant height (197.9 cm) and dry matter production (10567 kg ha^-1), growth analysis viz., Leaf Area Index (LAI) (7.05), Crop Growth Rate (CGR) (10.58gm^-2 day^-1), Absolute Growth Rate (AGR) (105.836 g plant^-1 day^-1), Relative Growth Rate (RGR) (0.01690 g g^-1 day^-1) and Net Assimilation Rate (NAR) (0.1420 g m^-2 day^-1) and Green cob yield (8809 kg ha^-1) and Green fodder yield (13650 kg ha^-1). This was statistically comparable with the 20% N as granular urea at basal + 20% N as nano urea at 4 leaf stage + 40% N as nano urea at 8 leaf stage + 20% N as nano urea at tasseling stage (T₅). However, the treatment control (T₁- without N) registered low values on all the above traits.