Effect of Number of Seedlings Hill-1 and Rate and Time of Nitrogen Application on the Yield of Late Transplant Aman Rice (cv. Br23)

Abstract

A field experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to examine the effect of number of seedlings hill^‑1 and rate and time of nitrogen application on the yield of late transplant Aman rice (cv. BR23). The experiment comprised three levels of number of seedlings hill^-1 viz. 2, 4, and 6, three nitrogen rates viz. 0, 60 and 120 kg N ha^-1 and three levels of time of nitrogen application viz. nitrogen application in two equal splits at 15 DAT and early tillering stage (ET); nitrogen application in three equal splits at 15 DAT, ET and panicle initiation (PI) stage; nitrogen application in four equal splits at 15 DAT, ET, PI and flowering (F) stages. The experiment was laid out in a randomized complete block design with three replications. Number of effective tillers hill^‑1, grain yield and straw yield were the highest when 6 seedlings were transplanted hill^‑1 while all yield contributing characters, grain and straw yields were the highest at 120 kg N ha^-1. In case of interaction, the highest grain yield was recorded in combination of 6 seedlings hill^-1 × 120 kg N ha^-1 and 120 kg N ha^-1 × three times of nitrogen applications (15 DAT + ET + PI). The highest number of effective tillers hill^-1 and grain yield were recorded in 6 seedlings hill^-1 × 120 kg N ha^-1 × three times N application (15 DAT + ET + PI) and thus this practice appears as the promising one for late transplant Aman rice ( cv. BR23) cultivation.

Int J Appl Sci Biotechnol, Vol 3(4): 692-698