Impacts of treated sewage effluent on seed germination and vigour index of monocots and dicot seeds

The sewage effluent is used as source of irrigation in developing as well as developed countries. The usage of the treated effluent for agricultural purpose and recreational activities are due to the demand of the water worldwide. This study aims to reveal the impact of various concentration of the treated sewage effluent on the germination and physiological parameters of green gram (Vigna radiata), red gram (Cajanus cajan) and paddy (Oryza sativa). Treated sewage effluents collected from three different sewage treatment plants of Mysore City (Kesere, Vidhyarayanapuram, Rayenakare) was used to cultivate the seedling with different concentrations (10, 20, 30, 40, 50, 60, 70, 80, 90 and 100%). It is concluded that the germination percentage of the seedlings are maximum at lower dilutions of 10–30% for all the treated water. The highest shoot length (27.53) and root length (26.91) was reported was for paddy cultivated with Kesare sewage water at an effluent concentration of 10%. The seedling cultivated in Kesare treated sewage effluent exhibited maximum shoot length and root length. The vigour index was reported to be higher for effluent concentration of 10%. This study concludes that the seed germination, root length, shoot length and vigour Index are dependable on the concentration of the effluent used. In 10% concentration of effluent is most effective and stresses the need of proper concentration of the effluent for irrigation.