YIELD AND AROMATIC QUALITY OF FRAGRANT RICE AS INFLUENCED BY NITROGEN AND SULPHUR FERTILIZERS

Abstract

The study was conducted in the experimental field of Sher-e-Bangla Agricultural

University, Sher-e-Bangla Nagar, Dhaka during June to December 2018 to assess the yield and aromatic quality of fragrant rice influence of nitrogen and sulphur fertilizers. BRRI dhan34 was selected as variety for the experiment. The experiment 1 consisted of two factors: Factor A: Levels of nitrogen (4 levels) as- N , N 2 : 41.47 kg N ha -1 , N 3 : 46.08 kg N ha -1 , N 4 : 50.69 kg N ha -1 1 and Factor B: Levels of sulphur (4 levels) as- S 1 : 6.4 kg S ha -1 , S 2 : 7.2 kg S ha -1 , S 3 : 36.87 kg N ha : 8.0 kg S ha : 8.8 kg S ha -1 . The experiment was laid out in split-plot design with three replications placing N levels in the main plot and sulphur in the sub-plot. Data were recorded on growth characters, yield and quality. Statistically significant variations were recorded for most of the characters due to different treatments. Nitrogen and/or sulphur levels had significant effect on effective tillers, filled grains, weight of 1000 grains, grain yield, milled rice, protein content, amylose content, proline content and grain 2-AP content. Maximum 1000 grain weight and grain yield were found from N Protein and Zn content showed as increasing trends with increasing N levels while amylose, proline and grain 2-AP content decreased with the same. Results of S levels revealed that protein and Zn contents decreased with increasing levels whereas, amylose, proline and grain 2-AP content increased with increasing S levels. Among the treatment combinations, the highest 1000 grains weight (12.13-13.21 g) and yield (4.92-5.48 t ha -1 ) significantly recorded from N 2 S 1 , N 2 S 2 , N 2 S 3 and N The highest protein content (9.03%) was recorded from N 4 S 2 2 S 4. -1 and S

and the lowest (7.40%) was in N . The highest amylose content (27.0%) was recorded from N 1 S

and the lowest (14.73%) was from N 4 S 1 . The maximum proline content (24.0 mg g 4 dry weight) was recorded from N 1 S 2

while the lowest (16.67 mg g -1 -1 2 . dry weight) was in N . The highest grain 2-AP content (0.980 µg g -1 dry weight) was recorded from N

and the lowest (0.493 µg g -1 dry weight) was found from N 4 S . The fertilizer levels 41.47 kg N ha -1 and 6.4 kg S ha -1 1 showed the best performance when considered yield and in case of amylose, proline and grain 2-AP content, 36.87 kg N ha and 8.8 kg S ha -1 produced good aromatic quality of rice .