Study on Nitrogen management through nano urea and conventional urea in wheat (Triticum aestivum L.)

Abstract

AVT trial on fodder oats was conducted during rabi 2022-23 at the ICR farm, Assam Agricultural University, Jorhat, Assam. The aim of the experiment was to assess the performance of different fodder oats entries with different doses of nitrogen. In the trial, five fodder oat entries (HFO-917, HFO-1014, JO-03-513, JHO-20-2, and OL-1931), along with two national checks (UPO-212 and JHO-822), were evaluated. The entries were tested under three nitrogen levels (70, 105, and 140 kg/ha) to assess their response. 50% of N was applied as basal (during sowing) and remaining 25% as 1st top dressing (30 DAS) and 25% as 2nd top dressing (after 1st cut, 61 DAS). The experiment was conducted in split plot design with entries in main plot and different doses of nitrogen in subplot and replicated thrice. Findings revealed that highest leaf stem ratio (1.85), no. of tillers/m row length (115.00), no. of leaves (6.67) was demonstrated by JHO-20-2 among all the entries. However, HFO-917 recorded higher plant population/m row length (29.78) which was at par with HFO-1014 (27.33) and JHO-20-2 (26.78). Among the nitrogen treatments, application of 140 (kg/ha) showed higher plant (87.76 cm) which was at par with 105 (kg/ha) with a height of 92.84. Among the entries, highest green fodder yield was showed by JHO-20-2 (363.75 q/ha). Meanwhile, OL-1931 showed higher dry matter yield of 44.18 q/ha which was at par with JHO-20-2 (44.18 q/ha). JHO-20-2 showed highest seed yield of 11.54 q/ha. Application of 105 kg/ha of N gave highest seed yield of 10.33 (q/ha). For crude protein%, 140 kg/ha of N showed 10.45% which was at par with 105 kg/ha (10.37%).