Author(s): L Baskaran, P Sundaramoorthy, ALA Chidambaram, K Sankar Ganesh
The present research work has been carried out to understand the effect of different concentrations of sugar mill effluent on growth, yield, biochemical contents and enzymatic activities of greengram (Vigna radiata (L.) Wilczek). The increasing pace of industrialization in public and private sectors along with urbanization, population explosion and green revolution are reflected in varying degree of pollution of water, soil and air. The sugar mill effluent is having a higher amount of organic and inorganic elements. The physico-chemical analysis showed that it was acidic in nature and yellowish in colour. It was rich in total suspended and dissolved solids with large amount of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). The higher amount of chloride, calcium, magnesium, sodium, potassium and iron were also present in the effluent. The effluents severally affect crop plants and soil properties when used for irrigation. Pot culture experiments were conducted with greengram at different concentrations of sugar mill effluent. The growth parameters such as germination percentage, shoot length, root length, Fresh Weight (FW), Dry weight (DW) and leaf area were measured at 15,30,45 and 60 Days After Sowing (DAS). The pigment analyses viz. chlorophyll ‘a’, chlorophyll ‘b’, total chlorophyll, protein, amino acid, sugar contents and enzymes activities were analysed at 15 and 60 DAS. The yield parameters of greengram plants were recorded at the time of harvest. All morphological growth parameters, biochemical contents, enzyme activities and yield parameters were found to increase at 10% effluent concentration and it decreased from 25% effluent concentration onwards. So, these results reflect that the sugar mill effluent is toxic to crop and it can be used for irrigation purpose after a proper treatment with appropriate dilutions.