EFFICACY OF DI-AMMONIUM PHOSPHATE (DAP) FERTILIZER FOR THE GROWTH AND YIELD OF BRRI dhan89 AS BORO RICE

Abstract

An experiment was conducted at the Research Farm, Sher-e-Bangla Agricultural University, Dhaka during the period from November 2019 to May 2020 in boro season to find out the efficacy of di-ammonium phosphate (DAP) fertilizer for the growth and yield of BRRI dhan89 as boro rice. The experiment consisted of nine treatments viz.T 1 (No fertilizer; Control), T 2 P 20(from DAP) K 70 S 15 Zn 1.5 kg/ha), T 8 (Recommended Fertilizer Dose, N 140 K 70 S 15 Zn 1.5 kg/ha), T 6 (N 180 kg/ha), T 4 (N 140 P 10(from TSP) (N 100 P 15(from TSP) K 70 S 15 Zn 1.5 P 20(from TSP) K 70 S 15 P 20 (from TSP) Zn 1.5 K 70 kg/ha) and T 9 S 15 K 70 Zn 1.5 kg/ha), T 7 (N 180 S 15 Zn 1.5 kg/ha), T 5 (N 140 kg/ha), T 3 (N 100 P 15(from DAP) P 10(from DAP) K 70 BRRI dhan89 was used as a test crop for the experiment. The experiment was laid out following Randomized Complete Block Design (RCBD) with three replications. Results showed that longest plant (108.92 cm), the highest number of effective tillers hill (13.54), the maximum number of filled grains panicle -1 (166.66), weight of 1000 grains (26.38 g), grain yield (8.48 t ha DAP) K 70 S 15 -1 Zn 1.5 ) and straw yield (10.90 t ha -1 ) were observed from treatment, T 5 S 15 kg/ha). The lowest results on the respected parameters were found from T 1

(No fertilizer; control). The highest value of the N and K content in post-harvest soil was obtained from treatment 9 T

(N 180 P 10(from DAP) K 70 S 15 Zn 1.5 kg/ha) and T 1 (No fertilizer; control) treated soil showed the lowest.

(N 140 P 20 (from DAP) K 70 S 15 Zn 1.5 -1 (N 100 Zn 1.5 kg/ha). P 20 (from