GROWTH AND YIELD OF BORO RICE BRRI dhan 29 AS INFLUENCED BY NITROGEN APPLICATION AND SEEDLING TYPES

Abstract

A field experiment was carried out at Agronomy Field of Sher-e-Bangla Agricultural University, Dhaka during the period from December 2007 to May 200810 study the growth and yield olfloro rice BRRI dhan29 as iniluenced by N application and seedling types. The experiment was conducted with two levels of treatments viz. A. N application No nitrogen (control) (N 0 ). 2 splits at '/2 at active tillering stage + ½ at paniele initiation stage (N 1 ). 3 splits at 1/3 at 15 DAT 1 1/3 at active tillering stage ± 1/3 at panicle initiation stage (N 2 ). 3 splits at 1/3 at 15 DAT + 1/3 at active tillering stage + 1/3 at paniele initiation stage- additional IC) kg N ha" at flowering stage (N3 ) and Urea Super Granules (N.1 ) and B. Seedling types: normal seedling as produced using farmers' practices (Si ). seedling produced following I3RRI recommendation (52) and robust seedling from modified mat nursery (53 ). The experiment was laid out in split-plot design with 3 replications. Experimental result showed that N application had significant effect on the studied parameters like plant height, number of tillers hilr', dry matter weight plant", number of effective tillers hill", number of non-effective tillers huE', total grains panicle", filled grains paniele", unfilled grains panicle". 1000-grains weight. grain yield, biological yield and harvest index. The highest grain yield (7.27 t ha") was obtained from the Urca Super Granules (N 4 ) and control (N0) gave the lowest grain yield (3.02 I ha"). Seedling types also significantly influenced all the growth and yield attributes. The highest grain yield (6.27 t ha") was obtained from robust seedling from modified mat nursery and the lowest grain yield (5.10 t ha") was recorded from normal seedling as produced using farmers' practices (S i ). The combined effect oIN application and seedling types had also significant effect on growth. yield attributes and yield. The interaction of Super Granule Urea N4 ) with robust seedling from modified mat nursery (5 3) gave the highest grain yield (7.84 t ha").