Effect of Treated Dairy Effluent Water on Yield, Nutrient Content and Uptake by Castor-Sorghum Sequence

With increasing dairy industrial development, safe disposal of industrial effluent has become an ecological challenge. Finding suitable eco-friendly techniques for the potential utilization of these released effluents as a source of nutrients become essential. The present investigation was carried out to screen the effect of dairy effluent water in combination with FYM @ 5 t ha -1 , gypsum @1 t ha -1 and sewage-sludge @ 3 t ha -1 on the yield, nutrient content and uptake by castor-sorghum sequence as well as physico-chemical properties of soil. The findings revealed a remarkable effect on yield and nutrient uptake by crop with primary treated dairy effluent water when combined with FYM and gypsum. The application of FYM @ 5 t ha -1 or gypsum @ 1 t ha -1 in the soil, increased the yield, nutrient content and uptake by castor as well as succeeding fodder sorghum crop, when applied with tube well, as well as treated effluent water. Further work was carried out to study the effectiveness and suitability of dairy effluent on soil properties after harvest of the crop. Application of treated effluent water alone increased EC and reduced the availability of nutrients (N, P, K, S), while combination with FYM enhanced the soil fertility.