EFFECT OF NPK BRIQUETTE FERTILIZATION ON THE GROWTH AND YIELD OF AROMATIC RICE VARIETY BRRI dhan70

Abstract

The experiment was conducted during the period of July to November, 2017 in the experimental farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka to assess the effect of NPK briquette fertilization on the growth and yield of aromatic rice variety BRRI dhan70. The experiment comprised of the following 7 treatments as- T 0 : Control i.e. no fertilizer; T 1 ii : 100% RFD; T 2 : 120% RFD; T 3 : 80% RFD; T 4 : 1 NPK briquette in between 4 hills and T 5 : 2 NPK briquette in between 4 hills and T 6 : 80% RFD + 1 NPK briquette in between 4 hills. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Data were recorded on different yield contributing characters, yield and characteristics of post-harvest soil. Statistically significant variation was recorded for different treatments. During harvest, the longest plant (126.06 cm) was recorded from T 6 treatment, while the shortest plant (110.68 cm) from T 0 . The maximum number of effective tillers hill

(22.80) was observed from T 6 treatment, whereas the minimum number (15.40) from T 0 treatment. The longest panicle (26.63 cm) was recorded from T 6 treatment, while the shortest panicle (19.50 cm) from T 0 treatment. The maximum number of filled grains panicle -1 treatment, while the minimum number (101.60) from T 0 (120.60) was observed from T 6 treatment. The highest grain yield (4.72 t ha -1 ) was recorded from T 6 treatment, while the lowest grain yield (2.04 t ha -1 ) from T 0 treatment. In post-harvest soil, the highest total N (0.067%) was found from T 6 treatment, while the lowest soil total N (0.021%) from T 0 treatment. The highest available P (39.32 ppm) was observed from T 6 treatment, whereas the lowest available P (14.40 ppm) from T 0 treatment. The highest exchangeable K (0.177 meq/100 g soil) was observed from T 6 treatment, while the lowest exchangeable K (0.123 meq/100 g soil) from T 0 treatment. Applications of T 6 treatment (80% RFD + 1 briquette NPK) was the superior among the other treatments in consideration of yield contributing characters and yield of aromatic rice variety BRRI dhan70.