EFFECT OF SOWING DATE ON GROWTH AND YIELD OF MUNG BEAN (Vigna radiata L.)

Abstract

Sowing time is an important agronomic factors that significantly affects plant growth development and final production. Similarly, suitable cultivar also plays an appreciable rate in final productivity. Therefore, the experiment was conducted in the research field of the Sher-e-Bangla Agricultural University, Dhaka from March 2020 to June 2020 to study the effect of sowing date on growth and yield of Mung bean (Vigna radiata L). This experiment consisted of three Mung bean varieties viz. V 1 = BARI Mung-5, V 2 = BARI Mung-6, V 3 = BARI Mung-7 sown on three different dates termed as treatments i. e. T 1 = 15 March 2020, T 2 = 30 March 2020, and T 3 = 15 April 2020 and different parameters were recorded. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The experimental plot was fertilized at the rate of 40 kg/ha (Urea), 80 kg/ha (TSP), 30 kg/ha (MoP) and necessary intercultural operations were done. The data regarding plant height, number of leaves and number of branches were recorded at both 30 Days after sowing (DAS) and harvest, and the other parameters were recorded at the time of harvest only. At 30 DAS, the highest plant height (22.67 cm) was observed in V 2

when sown on T 1 and during harvest plant height was found highest (55.17 cm) in the same variety with the same treatment. At 30 DAS and harvest, the highest number of leaves (average 4.33 and 15 respectively) were obtained in V 2 when sown on T 1 . In case of number of branches, at 30 DAS and harvest, the highest number (average 2.67 and 7.67) were observed in V 2 when sown on T 1 and T 3 respectively. The variety V 3

takes longer time for maturity (66 days) and V 1 variety takes less time for maturity (55.67 days). In terms of yield and yield attributes, the highest number of pods per plant (39) were recorded in V 2 when sown onT 1 and the number of fertile seeds per pod were recorded highest (14) in V 2 when sown onT 1 . The maximum pod length (14.67 cm) was recorded in V 2 when sown on T 1 . In case of 1000- seed weight the highest value (53.18 g) was recorded in V 2 when sown on T 1 . The maximum SPAD value (55), the highest yield (1.68 t ha -1 ), maximum biological yield (3.5 t ha ), the highest Stover yield (1.88 t ha -1 ) was recorded in V 2 when sown on T 1 . Finally, the maximum Harvest Index (53.33 %) was calculated in V 2 when sown on T 1 . The results in this study indicated that the variety performed better in respect of growth, yield and others yield contributing characters’ is V 2 (BARI Mung -6) on the sowing time T 1 (15 March 2020).