INFLUENCE OF ORGANIC MANURE, PHOSPHORUS - POTASSIUM ON GROWTH, YIELD AND SEED QUALITY OF BLACKGRAM

Abstract

A pot experiment was conducted at the net house of the Department of Agronomy, Sher-eBangla

Agricultural University, Dhaka during the period from April 2019 to August 2019 to investigate the growth, yield performance and seed quality of blackgram as influenced of organic manure, phosphorous and potassium. The experiment was laid out in two factors following Completely Randomized Design (CRD) with three replications. Factor A: Organic manure-3; viz. OM 0 = Control, OM 1 = Cowdung, OM 2 = poultry litter and Factor B: Chemical fertilizer-4; viz. F 0 = Control, F 1 = Recommended dose of chemical fertilizer, F 2 = 25% higher recommended dose of P+K fertilizer, F 3 = 50% higher recommended dose of P+K fertilizer. The rate of urea-40kgha -1 , TSP-70 kgha -1 and mop-35 kgha -1 and the rate of cowdung and poultry litter were 10 and 5 t ha -1 respectively.The resuls revealed that effect of poultry litter (OM 2 ) showed its superiority by producing highest yield (1419.5 kg ha -1 ), which may be attributed to higher blackgram pods plant -1 (23.81), seeds pod -1 (5.49), seed weight plant

(3.89), weight of 1000 seed (39.83 g) as well as highest pod length (5.11 cm), pod diameter (5.21 dm), plant height (49.68 cm), branches plant -1 (7.35) and dry weight plant (36.94 g) in this treatment. On the other hand, 50% higher recommended dose of P+K fertilizer seems promising in blackgram cultivation as this treatment (F 3 ) gave the highest seed yield (1372.6 kg ha -1 ) along with highest pod length (5.08 cm), pod diameter (5.19 dm), pods plant

(25.15), seeds pod -1 (5.44), seed weight plant -1 (4.09 g) and 1000 seed weight (39.49 g). Among the interactions, OM 2 F 3 out yielded by producing highest yield (1529.4 kg ha ) than other interactions. This interactions also produced the tallest plant (53.17 cm), highest number of branches plant -1 (7.75) maximum dry weight plant -1 (40.51 g), pod length (5.4 cm), pod diameter (5.43 mm), pods plant -1 (29.65), seeds pod (4.95g), 1000 seed weight (44.15 g), seed yield (1529.4 kg ha -1 -1 -1 -1 (5.76), seed weight plant ), strover yield (1759.4 kg ha

), biological yield (3288.8 kg ha -1 ), harvest index (46.60%), germination percentage (96.83%), seedling length (23.053cm), seedling dry weight (0.038 g) and lowest EC test value (1621.1 mS cm -1 ). The study clearly indicated that poultry litter as organic manure and 50% higher recommended doses of P+K fertilizer and their interaction seem promising for producing maximum seed yield and the best quality seed of Blackgram.