EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON GROWTH AND YIELD OF SOYBEAN (Glycine max L.)

Abstract

An experiment was conducted at Sher-e-Bangla Agricultural University Farm Dhaka, Bangladesh to study the effect of organic and inorganic fertilizers on growth and yield of soybean (Glycine max L.) during the period from November 2021 to March 2022 (Rabi season). The experiment was laid out in randomized complete block design (RCBD) with seven organic and inorganic fertilizer treatments i.e. T 1 : 100% RCF (Recommended chemical fertilizer) + 0 t ha

vermicompost, T 2 : 75% RCF + 2 t ha -1 vermicompost, T 3 : 75% RCF + 3 t ha

vermicompost, T 4 : 75% RCF + 4 t ha -1 vermicompost, T 5 : 50% RCF + 2 t ha

vermicompost, T 6 : 50% RCF + 3 t ha -1 vermicompost and T : 50% RCF + 4 t ha -1 7 vermicompost. For the purpose of evaluating the experimental outcomes, data on various parameters were statistically analyzed for evaluation of the different treatment effects. Experimental result revealed that the highest number of branches plant -1 (3.46), fresh weight plant -1 (10.60 g), number of pods plant

(27.53), pod length (4.21 cm), seeds pod -1 (3.97), 1000-seed weight (115.67 g), seed yield (1.86 t ha -1 ), stover yield (2.17 t ha -1 ), biological yield (4.03 t ha ) and harvest index (46.15 %). were found in T treatment. On the other hand, the lowest value of these properties were obtained in T 4 (100% RCF) treatment. Soil pH, organic matter content, N, P, K, S of post harvest soil at surface (0-15 cm) layer, varied significantly amon different treatments. The highest pH in post harvest soil of soybean (6.27), organic matter content (1.86 %), total nitrogen content (0.069 %), available phosphorus (30.07 ppm), available potassium (0.171 meq/100 g soil) and available sulphur (17.66 ppm) were recorded with T 1 (75% RCF + 4 t ha -1 vermicompost) treatment whereas the lowest value were found in T treatment. Therefore, based on the above findings, it could be conclude that the use of vermicompost not only reduce the recommended doses of inorganic fertilizer but also improves the soil physico chemical properties and availability of nutrients in soil in the long run sustaining the soil productivity and improve growth and yield of soybean.