INFLUENCE OF NITROGEN AND PHOSPHORUS LEVELS ON YIELD AND SEED QUALITY OF RICE

Abstract

The experiment was conducted at the research farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during Boro season from December 2016 to May 2017 to study the influence of nitrogen and phosphorus levels on yield and seed quality of rice. The experiment comprised as two factors, i.e. different fertilizer doses i.e. F 0 = No fertilizer, F 1

= 50% less than recommended dose of fertilizer, F 2 = 25% less than recommended dose of fertilizer, F 3 = Recommended dose of fertilizer, F 4 =25% more than recommended dose of fertilizer, F 5 = 50% more than recommended dose of fertilizer, F 6 = 75% higher than recommended dose of chemical fertilizer; and two varieties i.e. V 1 = BRRI dhan28, V 2 = BRRI dhan74. The experiment was conducted following split plot design with three replications. The result revealed that fertilizer dose F 4 (25% higher than recommended dose) gave highest plant height (91.24 cm), effective tillers hill -1 (11.96), panicle length (19.70 cm), 1000 grains weight (29.42 g) and grain yield (6.91 t ha ). On the other hand, V 1 (BRRI dhan28) was superior by producing tallest plant (90.58 cm) which may be attribute the highest grain yield (5.96 t ha ). Interaction of F 4 V 1 was also superior in producing the highest yield (7.53 t ha1).

In case of seeds quality aspect, F 4 (25% higher than recommended dose) fertilizer dose gave the highest germination percentage (92.66%), shoot length (17.55 cm), root length (8.80 cm), shoot dry weight (20.86 mg) and root dry weight (14.60 mg). The variety V 2 gave highest germination percentage (87.42%), shoot length (16.58 cm), root length (8.75 cm), shoot dry weight (18.95 mg) and root dry weight (16.56 mg). From the result, it can be concluded that F 4 (25% higher than recommended dose) and V 2 (BRRI dhan28) most suitable for yield and seed quality. -1 -1