EFFECT OF SUGAR FACTORY EFFLUENTS ON GERMINATION AND EARLY SEEDLING GROWTH IN MUNGBEAN [VIGNA RADIATA (L.) WILCZEK]K.J. SALUNKE, S.M. KARANDE AND B.J. APPARAO
Effect of different concentrations of both untreated and treated effluents of sugar factory on the germination and early seedling growth of mungbean varieties PM2 and TAP-7 was studied. The Physico-chemical analysis of the effluents showed that the untreated effluent is colourless and acidic in nature, while the treated effluent is faint black in colour and alkaline in nature. The values of most of the parameters of untreated and treated effluents were within the tolerant limits recommended by ISI except BOD, COD oil and grease of untreated effluent. Different concentrations of effluents (25, 50, 75 and 100%) were used. Distilled water treated seeds served as control. Results indicated that none of the concentrations of the effluents could inhibit seed germination in PM-2. However, 10 to 20% inhibition in seed germination could be observed in variety TAP-7 treated with both untreated and treated effluents. Other growth parameters decreased with increasing concentrations above 25%. The vigour index of PM-2 was increased by 1.54% and 17.55% over the control in 100% untreated and treated effluents respectively; while in TAP 7 it was decreased by 20.93% and 24.19% over the control in 100% untreated and treated effluents. This differential behavioral response of seedling growth may be attributed to tolerance ability of the varieties to the effluent. In general the seedling growth parameters were not adversely affected probably due to low levels of pollution load of the effluents.
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