Effect of integrated use of organic manures, inorganic fertilizers and PSB on soil properties and performance of rice (Oryza sativa L.)

A field experiment was conducted during 2011-2012 to investigate the effect of integrated use of organic manures, inorganic fertilizers and PSB on soil properties and performance of rice (Oryza sativa L.). The treatments were control (T1), 100% N through urea + PSB + 20 kg S/ha (T2), 50% N through FYM+50% N through urea+PSB+20 kg S/ha (T3), 25% N through FYM + 75% N through urea+ PSB+20 kg S/ha (T4), 50% N through carpet waste+50% N through urea+PSB+20 kg S/ha (T5) and 25% N through carpet waste + 75% N through urea+PSB + 20 kg S/ha (T6). Application of 50% N through carpet waste + 50% N through urea +PSB+20 kg S/ha recorded significantly higher organic carbon content, available N, P, K, and S as well as higher growth rate in terms of plant height, number of tillers and also yield as compared to other treatments. Effect of carpet waste on availability of nutrients and growth and yield of rice was significantly superior over FYM. Integration of organic and inorganic fertilizers along with biofertilizer (PSB) inoculation increased soil available nutrients (N, P, K and S) status in comparison to chemical fertilizer alone. Application of 50% N through carpet waste+50% N through urea+PSB + 20 kg S/ha recorded significantly higher nutrients (N, P, K & S) uptake by crop as compared to other treatments.