Potassium and Weed Control Methods affected on Yield of Mungbean

Abstract

Mungbean is very promising pulse crop in Bangladesh but imbalance use of fertilizer and inappropriate weed management are the key reason for substantially lower yield of mungbean. Therefore, the experiment was conducted at the research plot of Sher-e-Bangla Agricultural University farm, Dhaka during the period from February, 2017 to June, 2017 to study the effect of potassium levels and weed control methods on the growth and yield of mungbean. The treatment consisted of three potassium level viz. K 0 = Control (No Potassium), K 1 = Recommended dose of Potassium (R), K 2 = 30% increased of R and four weed control methods viz., W 0 = No weeding (control), W 1 = One hand weeding at 15 days after sowing (DAS), W 2 = Two hand weeding at 15 DAS and 30 DAS, W 3 = One paraxon spray at 15 DAS. The experiment was laid out in a two factors randomized complete block design (RCBD) with three replications. The seeds of BARI mung-6 variety were the test materials. The highest plant height (45.30 cm), number of branch (10.54 cm), number of leaflets (17.00) and dry weight plant - 1 (7.30) was observed K 2 ×W 2 treatment. The highest plant height (27.90), pod length (9.48 cm), seeds pod -1 (10.22), weight of 1000 seeds (41.75 g), seed yield (1.63 t ha -1 ), strove yield (2.76 t ha -1 ), biological yield (4.37 t ha -1 ) and harvest Index (37.13%) was observed in the 30% increased of recommended dose of Potassium with two hand weeding (K 2 × W 2 ). The lowest plant height (21.08) was observed control (No Potassium and no weeding) (K 0 × W 0 ). The results indicated that the plants performed better in respect of seed yield and others yield contributing characters in K 2 ×W 2 (30% increased of recommended dose of Potassium with two hand weeding) treatment than the control treatment K 0 ×W 0 showed the least performance. Treatment K 2 ×W 2 (30% increased of recommended dose of Potassium with two hand weeding) was found to the most suitable combination for the highest yield of mungbean. days after sowing (DAS), W 2 = Two hand weeding at 15 DAS and 30 DAS, W 3 = One paraxon spray at 15 DAS. The experiment was laid out in a two factors Split Plot design (RCBD) with three replications. Potassium was used as main plot. There were 12 treatment combinations and 36 unit plots. The unit plot size was 5.52 m 2 (2.4 m X 2.3 m). The fertilizers were applied as basal dose @ N, P and K as 20, 17 and 20 kg ha -1 at final land preparation respectively in all plots and Seeds were sown at the rate of 40 kg ha -1 .