EFFECT OF POPULATION DENSITY AND VARIETY ON GROWTH AND YIELD OF MUNGBEAN

Abstract

The experiment was conducted at the Agronomy field laboratory, Sher-e-Bangla Agricultural University, Dhaka during April 10 to July IS. 2007 to study the effect of different population density viz, (25cm x 5cm, 25cm x 10cm, 25cm x 15cm and 25cm x 20cm) 80, 40. 25 and 20 plants m 2 respectively on the growth, yield, and yield attributes of four summer mungbean varieties (BARImung-4, l3ARImung-2. BARlmung-5 and L3INAmung-5). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Data on growth and yield parameters were recorded from vegetative growth to Maturity. All the collected data were statistically analyzed and the mean differences among the treatments were compared by Duncan's Multiple Range Test (DMRT). The results showed that all the growth, yield and yield attributes were significantly influenced by the population density. Lower population density, 25cm x 20cm (20 plants m 2 ) produced the highest root length, number of nodules and leaves planf',RCR at 66 days to maturity, number of branches and pods plant' weight, seed yield plant - ] , pod length, number of seeds pod', 1000-seed ' and harvest index. Yield performance of individual plant was significantly higher at lower population density, 25cm x 20cm (20 plants m while the total seed yield was higher at the population density of 25cm x 10cm (40 plants n1). The highest seed yield (1124Kg ha) was obtained from 25cm x 10cm (40 plants m 2 ) which was significantly different from 80. 25 and 20 plants m produced the highest plant height, CGR,RGR at 56-65 [)AS. It was concluded that out of the four population Higher population density, 25cm x 5cm (80 plants m 2 ) densities, 25cm x 10cm (40 plants rn") appeared to be optimum population density for seed yield in summer mungbean. Among the varieties BINAmung-5 showed better performance than the others. The highest seed yield (1640 kg hi') was obtained from BlNAmung-5 with 25cm x 10cm (40 plants nf 1 ). From the results of the experiment, it could be concluded that. for obtaining maximum seed yield of BlNAmung-5, might be grown with 40 plants m in summer season