Influence of GA3 and MH and their time of spray on morphology, yieldcontributing characters and yield of soybean
2004
Rahman, M.S. | Mohammed, N.I. | Tahar, A. | Karim, M.A.,BangladeshAgricultural Univ., Mymensingh (Bangladesh). Dept. of Crop Botany
The experiment was conducted to study the effect of plant growthregulators and their time of spray on morphology, yield and yield contributingcharacters of soybean. Plants of soybean Cv. PB-1 were sprayed three times(T1, = spray at 15 DAS, T2, = spray at 30 DAS and T3, = spray at 45 DAS)with two concentrations (100 and 200 ppm) of gibberellic acid (GA3) and maleichydrazide (MH). Significant variations exist among the concentrations ofgrowth regulators and with their time of application in respect ofmorphological, yield and yield contributing characters of soybean. T2 followedby T3 produced the tallest plant with the highest number of branches, leaves,flowers, pods per plant, number of seeds per pod, seed yield per plant, 100-seed weight and seed yield (t ha-1). T1 produced the least of them. GA3 wasmore effective than MH. GA3 at 100 ppm followed by GA3 at 200 ppm producedthe highest number of branches, leaves, flowers, pods per plant, number ofseeds per pod, seed yield per plant, 100-seed weight and seed yield (t ha-1)while 200 ppm MH was least effective to produce them. The present studyclearly shows that almost all the plants treated with growth regulatorsperformed better than control. However, interaction effect indicated that 100ppm GA3 treated plants sprayed at 30 DAS (T2C3) showed the bestperformance.
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