Influence of treated tannery effluent along with domestic wastewater on yield attributes, yield and nutrient uptake of cotton

Field experiment was conducted at the common effluent treatment plant (CETP), Dindigul, Tamil Nadu during winter 2013 to investigate the influence of treated tannery effluent along with domestic wastewater on yield attributes, yield and nutrient uptake of cotton. The experiment was laid out in a randomized block design replicated thrice. Treatments comprised six levels of irrigation sources viz 25 per cent treated tannery effluent (TTE) + 75 per cent domestic wastewater (DWW), 50 per cent TTE + 50 per cent DWW, 75 per cent TTE + 25 per cent DWW, 100 per cent TTE, 100 per cent DWW and control (normal water) under factor A and three amendments viz control (without amendment), gypsum and arbuscular mycorrhiza (AM) under factor B. The results revealed that the mixing proportion of 1: 3 ie application of 25 per cent TTE + 75 per cent DWW significantly increased the yield parameters (number of sympodial branches, number of fruiting points and number of bolls per plant), nutrient uptake (nitrogen, phosphorus and potassium) and yield of cotton. Regarding amendments, gypsum application registered higher seed cotton yield and nutrient uptake followed by AM.