EFFECT OF ORGANIC AND INORGANIC FERTILIZER APPLICATION ON RICE PRODUCTION (BRRI dhan29)

Abstract

The experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from December 2020 to May 2021 to examine the effect of organic and inorganic fertilizer application on rice production (BRRI dhan29). The experiment consisted of eight treatments viz. T ii 0 (control; no nutrient application), T

(100% RDCF: N 120 P 20 K 40 S 20 Zn 2.5 kg ha -1 ), T 2 (100% cowdung - 10 t ha (100% poultry manure - 5 t ha -1 ), T 4 (50% RDCF + 50% cowdung),

T (50% RDCF + 50% poultry manure), T 6 (25% RDCF + 75% cowdung) and T 7 5 (25% RDCF + 75% poultry manure). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Results showed that a significant variation among the treatments was found while different nutrient levels (organic and inorganic) applied in different combinations. The treatment T 1 (100% RDCF: N 120 P 20 K 40 S ) exhibited the highest plant height at 60, 90 DAT and at harvest (83.73, 95.87 and 94.37 cm, respectively) while the treatment T (50% RDCF + 50% cowdung) showed the highest number of tillers hill -1 4 (13.13, 15.33 and 17.73, respectively) whereas control treatment T (no nutrient application) showed the minimum results. Again, the treatment T 4 0 (50% RDCF + 50% cowdung) showed the highest number of effective tillers hill -1 (16.33), flag leaf length (24.28 cm), number of filled grains panicle (165.40), panicle length (25.94 cm), 1000 seed weight (21.90 g), grain yield (7.66 t ha -1 ), straw yield (8.96 t ha -1 ) and harvest index (46.09%) followed by T (50% RDCF + 50% poultry manure) and T (25% RDCF + 75% poultry manure) whereas the control treatment T 0 7 (no nutrient application) performed the lowest results on the respected parameters. In case of post harvest soil, different treatments of organic and inorganic fertilizers combinations showed non-significant variation on particle density, pH and organic carbon content but available P and S of post harvest soil affected significantly. The treatment T (50% RDCF + 50% cowdung) showed highest P (23.42 ppm) and S (27.40 ppm) content of post harvest soil whereas the lowest P and S content was obtained from control treatment T 4 (no nutrient application). So, the treatment T 4 0 (50% RDCF + 50% cowdung) can be considered as very promising treatment for rice production (BRRI dhan29) to obtain higher grain yield.