ROOT GROWTH AND YIELD OF SUMMER MUNGBEAN IN RESPONSE TO RESIDUAL EFFECT OF DIFFERENT LIMING CONDITIONS

Abstract

A field experiment was conducted to investigate the root growth and yield potential of summer mungbean under residual effect of different levels of lime. Different doses of dolomite (CaCO;.MgCO3) lime were used for liming materials (T;= 0 kg lime ha”, T= 500 kg lime ha’, T3= 1000 kg lime ha', Ty= 1500 kg lime ha’', T= 2000 kg lime ha™', T= 2500 kg lime ha’, T7= 3000 kg lime ha’, Ts= 3500 kg lime ha’'). Mungbean root growth was slightly increased due to residual effect of lime. Root length and weight significantly increased under liming condition. The highest number of leaf number plant’! (22.23) was found in T7 followed by T2, T3, Ty, Ts, Te, and Ts. The lowest leaf plant’! (18.00) was obtained in T, plant. The highest plant height (28.23 cm) was recorded in T> followed by T;, Ty, Ts, Ts, Tz and Ts and the lowest leaf plant’ (21.47 cm) was originated in T; at 35 days after sowing. The highest plant height (56.10 cm) was recorded in T followed by Ty, Ts, Ts and T7. Conversely, the lowest plant highest (45.50 cm) was increased in T, similar to that of T3; at 70 days after sowing. The highest number of pod plant’ (25.33) was found in Ts which was similar to that of Ts, T7 and Ts. The lowest number of pod plant’! (11.67) was found in T, plants. Liming effect on the number of seed pod’! was found statistically significant. The highest number of seed pod’! (12.00) was obtained in Ts similar to that of Ty, Ts, T7 and Tg plants. The lowest number of pod plant’ (9.00) was recorded in T,. Liming effect on grain yield was highly significant. The highest grain yield (1365 kg ha’') was found in Ts similar to that of T; and Ts. The lowest grain yield (1210 kg ha") was observed in T). Liming effect on dry biomass plot’! was found statistically significant. This study reveals that lime application at the rate of 2000 kg ha is recommended for better root growth and higher yield in summer mungbean in the study area.