Relative Influence of organic manures in combination with chemical fertilizer in Improving rice productivity of lateritic soil
2003
Bhadoria, P.B.S. | Prakash, Y.S.
Field experiments were carried out to evaluate relative efficacy of organic manures in combination with chemical fertilizers (CF) against application of only CF in improving the productivity of rice in a lateritic soil. Organic manures were applied at 50 percent recommended N equivalent basis and balanced with chemical fertilizers to attain the recommended N, P and K levels. The effect of three commercial manures: processed city waste (PCW) + CF, vermicompost (VC) + CF, and oil cake pellets (OC) + CF and locally available farmyard manure (FYM) + CF were assessed in comparison to chemical fertilizer. Results indicate that organic manure treatment on balancing with chemical fertilizers to the recommended dosage of N, P and K favored higher dry matter production and grain yield as compared to application of only CF. Among the different manures tested, the increases in yield was maximum with FYM + MC + CF and minimum with OCP + CF. The percentage increase in grain yield of different organic treatment plus chemical fertilizer over chemical fertilizer only varied from, 4% for OC + CF and 26% for FYM + MC + CF, respectively. The uptakeof N, P and K by rice plants was significantly greater in treatments with organic manures in combination with CF. Among the commercial manures PCW + CF showed high promise and emerged as a potential alternative to FYM.
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