EFFECT OF INTEGRATED USE OF ORGANIC AND INORGANIC FERTILIZER ON THE GROWTH AND YIELD OF BRRI dhan29

Abstract

A field experiment was conducted at Sher-e-Bangia Agricultural University Farm, Dhaka-1207 during December 2013 to June 2014 LO study the effect of 4 levels of vermicompost viz.• 0 r ha" (Yo). I r ha'i (VI), 2 t ha'i (Y2), 4 t ha'i (V3) and 4 levels of chemical fertilizers viz., Fo = ( 0-0-0-0 kg ha'i N, P, K, S, respectively), FI= low level (50-8-33~ kg ha'i N, P, K, S, respectively), F2o: medium level (100- 16-66-12 kg ha'i N, P, K, S, respectively). FJ = high level (150-24-99-18 kg ha" N. P, K, S, respectively) on the growth, yield and nutrient concentration in grain and straw of boro rice (BRRl dban29). Different levels of vennieompost and NPKS fertilizers showed significant effect on growth. yield and yield contributing characters of BRIU dban29. Results showed that application of medium level of chemical fertilizers with 4 t ha'i vermicompost gave the maximum yield. It was observed that over dose of NPKS fertilizers from chemical source decreased rice yield. Results also revealed that the highest plant height, effective tillers hill'l, flog leaf length, panicle length. filled grains panicle", IOOO-grainweight, grain yield, straw yield and biological yield were obtained from the combination of 4 t ha'i vcrmicompost with 100 kg ha'i N, 16 kg ha" P, 66 kg ha'i K, 12 kg ha·1 S. The highest dose of vcnnieompost and chemical fertilizer increased the concentration of P, K, and S by rice grain and straw significantly at the harvesting stage. Application of chemical fertilizer and vemricompost alone or combined failed to increase the total N content of post-harvest soil Vcrmicompost and chemical fertilizers alone or combined increased the organic matter, P, K and S status of post harvest soil significantly.