抄録
A field experiment was conducted to evaluate the effect of different nitrogen levels on the yield performance of three aromatic rice varieties in the transplanted aman (monsoon) season. The rice varieties including Morichshail, Kachra and Raniselute and five nitrogen levels i.e. 0, 30, 60, 90 and 120 kg N/ha were formed for the treatment variables. The experiment was laid out in a Randomized Complete Block Design (RCBD) with two factors and three replications. During harvest, data were collected on different yield contributing characters and yield of aromatic rice, respectively. All the yield contributing characters were differed significantly due to the variety. Morichsail produced the maximum number of grains per panicle (76.35) and gave the maximum grain yield (2.69 t/ha). Different nitrogen rates also significantly affected the yield and yield attributes of aromatic rice varieties. Plant height, total tillers/hill and biological yield were increased with the nitrogen application. Panicle length, effective tillers/hill, 1000-grains weight, grain yield and harvest index were significantly increased up to 60 kg N/ha application and thereafter decreased. The combination of varieties and nitrogen rates were significantly affected to panicle length, filled grains/panicle and grain yield of aromatic rice varieties. It was observed that interaction of the variety Morichsail with 60 kg N/ha application gave the highest panicle length, filled grain/panicle and grain yield in this experiment.
