ROLE OF INORGANIC AND ORGANIC (COMPOST) FERTILIZERS ON THE GROWTH AND YIELD OF SOYBEAN (Glycine max L.)

Abstract

The experiment was conducted at the Research farm of Sher-e-Bangla Agricultural University, Bangladesh to find out the role of inorganic and organic (compost) fertilizers on the growth and yield of soybean (Glycine max L.) during the period from November 2021 to March 2022. Two factors experiment was laid out in RCBD (Randomized Complete Block Design) with three replications. Four different organic (compost) fertilizer levels viz. C 0 (control; no compost), C 1 (compost 6 t ha -1 ), C 2 (compost 8 t ha ) and C 3 (compost 10 t ha -1 ) in association with two treatments of inorganic fertilizers viz. F 0 (control; no chemical fertilizer) and F 1 (Recommended fertilizer dose) were considered for the present study. Regarding the treatments combinations of organic (compost) and inorganic fertilizers, C 2 F 1 (compost 10 t ha -1 × recommended fertilizer dose) showed the best yield contributing parameters and yield of soybean and gave the maximum number pods plant -1 (48.20), pod length (3.60 cm), number of seeds pod

(2.96), 1000 seed weight (124.20 g), seed yield (1.51 t ha -1 ), stover yield (1.71 t ha ), biological yield (3.22 t ha -1 ) and harvest index (46.93%) followed by C 3 (no compost and no chemical fertilizer) showed least performance. Regarding the quality parameters of post harvest soil, the treatment combination C 3 F 1 F 1 whereas C 0 (compost 10 t ha × recommended fertilizer dose) exhibited the best value on organic matter content, available phosphorus and sulphur content while particle density and organic carbon content of post harvest soil did not vary significantly among the treatment combinations. So, it can be concluded that the treatment combination of C 2 F 1 (compost 8 t ha × recommended fertilizer dose) can be considered as the best to achieve higher soybean yield followed.