INFLUENCE OF ORGANIC MANURE AND POTASSIUM ON YIELD AND SEED QUALITY OF SOYBEAN

Abstract

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October, 2019 to March, 2020 to study the influence of organic manure and potassium on yield and seed quality of soybean. The experiment was laid out in Split plot Design (2 factor) replicated with three times. For this study, factor A- V 1 : BARI Soybean 6 and V 2 : BINA Soybean 1 and factor B- T 1 ii : Trichoderma (2 t/ha); T 2 : Trichoderma (2 t/ha) + 70 kg/ha K; T 3 : Trichoderma (2 t/ha) + 90 kg/ha K, T 4 : Biochar (10 t/ha), T 5 : Biochar (10 t/ha) + 70 kg/ha K, T 6 : Biochar (10 t/ha) + 90 kg/ha K, T 7 : Recommended dose of fertilizer (50, 150, 100, 50 & 8 kg/ha of urea, TSP, MoP, Gypsum and boric acid, respectively) and T 0 : Control. The yield attributing characteristics (i.e. plant height (52.18 cm), number of leaves/plant (13.80 leaves), number of pods/plant (49.88 pods), pod length (3.14 cm), seeds per pod (2.50 seeds), 1000 seeds weight (123.5 g), seed yield (2.23 t/ha), stover yield (3.96 t/ha), biological yield (6.19 t/ha) and harvest index (35.90 %)) and seed quality (seed viability (71.88 %) and seed germination (85.00 %)) were highest and the timing of 1 st flowering (30.88 days) and timing of pod maturity (51.63 days) were lowest for BARI Soybean 6. The yield attributing characteristics (i.e. plant height (54.60 cm), number of leaves/plant (15.22 leaves), number of pods/plant (61.50 pods), pod length (3.36 cm), seeds per pod (3.50 seeds), 1000 seeds weight (137.9 g), seed yield (2.55 t/ha), stover yield (4.41 t/ha), biological yield (6.96 t/ha) and harvest index (36.65 %)) and seed quality (seed viability (78.50 %) and seed germination (93.00 %)) were highest and the timing of 1

flowering (28.50 days) and timing of pod maturity (49.50 days) were lowest for Biochar (10 t/ha) + 70 kg/ha K treatment. Again, BARI Soybean6 along with Biochar (10 t/ha) + 70 kg/ha K showed the best performance in the yield attributing characteristics (i.e. plant height (55.89 cm), number of leaves/plant (15.47 leaves), number of pods/plant (66.00 pods), pod length (3.45 cm), seeds per pod (4.00 seeds), 1000 seeds weight (138.8 g), seed yield (2.63 t/ha), stover yield (4.49 t/ha) and biological yield (7.12 t/ha)) and seed quality (seed viability (84.00 %) and seed germination (94.00 %)) and the timing of 1 st flowering (28.00 days) and timing of pod maturity (49.00 days) were lowest. The combined effect of BARI Soybean 6 with Biochar + 70 kg/ha K showed the best performance in case of increasing soybean growth, yield and seed quality compared to other treatments.